[406] | 1 | Duchamp version 1.1.3 (2008/01/08) |
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| 2 | ---------------------------------- |
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[404] | 3 | |
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| 4 | A minor update that just improves the build process. The location of |
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| 5 | the wcslib include files was not specified correctly, so that some |
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| 6 | machines were unable to find them. The configure script has been fixed |
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| 7 | so that the compilation should work in all cases. |
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| 8 | |
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[405] | 9 | Some minor changes have also been made to the code in the PixelMap |
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| 10 | directory, to fix warnings that may appear in compilation. |
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[404] | 11 | |
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[405] | 12 | However, there are no changes to the actual workings of the code in |
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| 13 | this minor version, so if you have a working version of Duchamp 1.1.2 |
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| 14 | there is probably no reason to update. |
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| 15 | |
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[389] | 16 | Duchamp version 1.1.2 (2007/12/07) |
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| 17 | ---------------------------------- |
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[349] | 18 | |
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[363] | 19 | Compilation: |
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| 20 | |
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[349] | 21 | * The compilation had problems working correctly when the cfitsio and |
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[373] | 22 | wcs libraries were not in standard locations. The configure script |
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[349] | 23 | has been tweaked to make sure the libraries are found. |
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| 24 | |
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| 25 | * Problems with compiling in the absence of pgplot have been fixed, |
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| 26 | and it should now compile fine. |
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| 27 | |
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[362] | 28 | * Improved the configure script for use with Mac OS X and gfortran. |
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[349] | 29 | |
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[363] | 30 | |
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| 31 | Bugfixing: |
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| 32 | |
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[362] | 33 | * A major problem with the text-based output was fixed. The widths of |
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| 34 | the columns were not being calculated correctly, and were running |
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[373] | 35 | together. This should no longer be the case. |
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[349] | 36 | |
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[374] | 37 | * There was a bug in the way Duchamp interpreted spectral axes, |
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| 38 | particularly AIPS types such as FELO-HEL, leading to incorrect |
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| 39 | scaling of the velocity axis. This has been fixed, so that |
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| 40 | non-standard types are now dealt with appropriately and the velocity |
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| 41 | scaling should be accurate. |
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[362] | 42 | |
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[376] | 43 | * Another bug meant the beam correction was always applied to the |
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| 44 | integrated spectra, regardless of whether the flux units involved |
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| 45 | the beam (e.g. Jy/beam). This has been fixed. Note that the values |
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| 46 | of the integrated flux presented in the results table were always |
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| 47 | calculated correctly. |
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| 48 | |
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[389] | 49 | * Other minor changes to improve the speed and efficiency, especially |
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| 50 | of the merging code. |
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| 51 | |
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[363] | 52 | New user parameters: |
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| 53 | |
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[381] | 54 | * There is now the possibility to save a FITS file that contains a |
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| 55 | mask array, indicating where the detected objects are. This is |
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| 56 | governed by the flagOutputMask parameter. |
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| 57 | |
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[363] | 58 | * The header information that is printed at the start of the results |
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| 59 | file -- that is, the list of parameters, the statistics of the cube, |
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| 60 | and the number of detections -- can now be written to a separate |
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| 61 | file. Set the flagSeparateHeader parameter to true or 1 and it will |
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| 62 | go to the file indicated by the headerFile parameter (the default is |
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| 63 | duchamp-Results.hdr). |
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| 64 | |
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[362] | 65 | * A "scaleMax" parameter has been added, so that the wavelet |
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| 66 | reconstruction can include only a specified range of scales (for |
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[373] | 67 | instance, if one wants to search just for narrow features such as |
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[362] | 68 | absorption lines). |
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| 69 | |
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[389] | 70 | * A "flagRobustStats" parameter has been added. This allows the user |
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| 71 | to elect to use robust statistics (median and median absolute |
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| 72 | deviation from the median) to estimate the noise parameters. If set |
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| 73 | to false, the mean and standard deviation will be used. The default |
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| 74 | value is true. |
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[362] | 75 | |
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[369] | 76 | New Feature: |
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[362] | 77 | |
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[369] | 78 | * When Duchamp is run on a 2D image (i.e. with no spectral output), it |
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| 79 | now produces a postscript file that shows information each |
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| 80 | individual source plus the image cutout of the source. This is |
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| 81 | similar to the spectral output file, but without the spectra. The |
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| 82 | filename is given by the spectraFile parameter. |
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| 83 | |
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[381] | 84 | * Ability to save a FITS file containing a mask array, with pixel |
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| 85 | values of 1 for pixels in a detected object, and 0 elsewhere. |
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[369] | 86 | |
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[381] | 87 | |
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[328] | 88 | Duchamp version 1.1.1 (2007/07/20) |
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| 89 | ------------------------------------ |
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| 90 | |
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[329] | 91 | Minor update to the release, with just a few changes: |
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[328] | 92 | |
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| 93 | * The verification script was generating diffs due to differences in |
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| 94 | the precision of some calculations when done on different machines. |
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| 95 | One of these was the integrated flux, and this has been corrected so |
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| 96 | that the same value should appear on all machines. |
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| 97 | The verification script has also changed so that just the number of |
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| 98 | sources and their positions are tested, as well as the |
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| 99 | logfiles. This should avoid the reporting of spurious differences. |
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| 100 | |
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| 101 | * The grey-scale used in the image cutouts (in the spectral plots) has |
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| 102 | been inverted. This makes it consistent with the scale used in the |
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| 103 | maps, and hopefully easier to see when printing. |
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| 104 | |
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[338] | 105 | * The configure/make system has been altered to make it easier to |
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| 106 | install, and to specify different external libraries. In particular, |
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| 107 | it is now not necessary to have PGPLOT installed on your system to |
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| 108 | run Duchamp. In the absence of PGPLOT, Duchamp will run as normal, |
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| 109 | just without any graphical output. Some source code needed to be |
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[344] | 110 | restructured to make this work. Please read the README file, or the |
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| 111 | Installation appendix in the User's Guide, for complete details. |
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[328] | 112 | |
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[329] | 113 | * The time of completion is now written to the log file, so that the |
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| 114 | user can have some idea of how long the program took. |
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[328] | 115 | |
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| 116 | |
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[310] | 117 | Duchamp version 1.1 (2007/05/17) |
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[259] | 118 | ------------------------------------ |
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| 119 | |
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| 120 | Changes made since the last numbered release: |
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| 121 | |
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[295] | 122 | EFFICIENCY OF EXECUTION: |
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| 123 | |
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[259] | 124 | * Major change to the way detections are stored. They are now recorded |
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| 125 | via run-length encoding in the x-y plane, and stored as collections |
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| 126 | of channel-maps. This improves the memory usage and the speed of |
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[298] | 127 | execution (particularly for routines such as the merging |
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| 128 | routines). The memory usage has also been improved by changing the |
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| 129 | way the list of detected objects is stored. |
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[259] | 130 | |
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[295] | 131 | SMOOTHING: |
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| 132 | |
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[279] | 133 | * Addition of ability to spatially smooth the cube before |
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| 134 | searching. This is done with a Gaussian kernel, the size and shape |
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[287] | 135 | of which can be specified by the user, using the parameters kernMaj |
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| 136 | & kernMin (which are the FWHM for the major & minor axes -- if |
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| 137 | kernMin is not given it is assumed to match kernMaj) and kernPA (the |
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| 138 | position angle of the major axis). There is a new parameter |
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[279] | 139 | smoothType that distinguishes this method from the spectral (Hanning) |
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| 140 | smoothing already in use. |
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| 141 | |
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[295] | 142 | DETECTIONS: |
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| 143 | |
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[264] | 144 | * Changed the way detection is done -- now only search in 2D images, |
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| 145 | keeping all detections (ie. no minimum-pixel requirement). This |
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| 146 | should be the same as doing both the 1D and 2D searches with the |
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| 147 | minimum pixel requirement in, but simpler. The rejection is done at |
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[295] | 148 | the end after all the merging and growing has been done. This leads |
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| 149 | to a larger number of intermediate detections (ie. the number |
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| 150 | before merging), which may increase the run-time slightly, although |
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| 151 | this is offset by the changes to the efficiency (see above). |
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[264] | 152 | |
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| 153 | * Increased the range over which objects can be grown to match the |
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| 154 | threshSpatial & threshVelocity parameters, as well as rejecting new |
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| 155 | pixels based on the BLANK and MW tests. |
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| 156 | |
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[295] | 157 | INPUTS: |
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[259] | 158 | |
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[287] | 159 | * There has been a subtle change in the way BLANK pixels are dealt |
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| 160 | with. To enable trimming of BLANK pixels, users should use the new |
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| 161 | parameter flagTrim. The parameters flagBlankPix and blankPixVal are |
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[295] | 162 | no longer accessible via the parameter file -- warning messages are |
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| 163 | given if they are provided in the parameter file. |
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[287] | 164 | |
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[295] | 165 | * Added ability to specify a statsec, so that the statistics are only |
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| 166 | calculated from a given subsection of the cube, rather than the full |
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| 167 | cube. |
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| 168 | |
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| 169 | * The subsections can also specify the ability to remove a border of n |
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| 170 | pixels from the edges of an axis (ie. n from the start and from the |
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| 171 | end) -- as requested in Trac ticket #5. |
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| 172 | |
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| 173 | * Changed the default value of the reconDim parameter from 3 to 1, and |
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| 174 | the default value of the flagATrous parameter to false. |
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| 175 | |
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| 176 | OUTPUTS: |
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| 177 | |
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[279] | 178 | * The output now includes three different estimates of the "centre" of |
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| 179 | the detection: peak location, centroid (flux-weighted), or average. |
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| 180 | |
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[295] | 181 | * Some slight improvements to the user feedback during execution. |
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| 182 | |
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[282] | 183 | * Spectral output now includes the baseline, if one was fitted. The |
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| 184 | format of the plot headers is slightly changed, to stop information |
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| 185 | falling off the edge of the page. |
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[279] | 186 | |
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[295] | 187 | * Added command-line option -x to directly disable the PGPLOT X-window |
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| 188 | map plotting. This overrides the setting of flagXOutput in the |
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| 189 | parameter file. |
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[259] | 190 | |
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[295] | 191 | * Fallback spectral units (in case the FITS header fails to record |
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| 192 | them) changed to SPC, but code has been fixed so that any problem |
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| 193 | should be caught before this becomes an issue. |
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| 194 | |
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| 195 | BUGFIXES: |
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| 196 | |
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[259] | 197 | * Fixed bug (Trac ticket #4) that meant the velocity units were not |
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| 198 | correctly dealt with. Duchamp should be more robust for different |
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| 199 | velocity axis setups now. |
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| 200 | |
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| 201 | * Fixed bug (ticket #9) with the VOTable output, where the tags were |
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| 202 | not closing. |
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| 203 | |
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[305] | 204 | * Fixed a bug that meant the integrated fluxes were not calculated |
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| 205 | properly -- no allowance was made for the number of spatial |
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| 206 | pixels. This should also work properly for 2D images now as well. |
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| 207 | |
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[264] | 208 | * Fixed minor bug in calculating the flux threshold from the p-value |
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| 209 | threshold when the FDR method is used. This did not affect the |
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| 210 | actual thresholding, merely the quoted flux threshold in the results |
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| 211 | file. Also, the MW channels are kept out of the p-value threshold |
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| 212 | determination if they are being flagged. |
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| 213 | |
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[259] | 214 | |
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| 215 | |
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[211] | 216 | Duchamp version 1.0.7 (2006/11/22) |
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| 217 | ---------------------------------- |
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| 218 | |
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| 219 | One new feature, and some improvements and bug-fixes. |
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| 220 | |
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[264] | 221 | * The user can now elect to Hanning-smooth the spectral direction of |
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| 222 | the cube before the searching is done. This can be done instead of the |
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| 223 | wavelet reconstruction (although if both are selected, the |
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| 224 | reconstruction takes precendence). This functionality is switched on |
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| 225 | and off by the flagSmooth parameter, and the width of the Hanning |
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| 226 | kernel is governed by the hanningWidth parameter. |
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[211] | 227 | |
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[264] | 228 | * The smoothed array can also be written to a FITS file and read in at |
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| 229 | the start in the same manner as the reconstructed array. |
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[211] | 230 | |
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[264] | 231 | * Several improvements have been made to the memory |
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| 232 | management. Several memory leaks were fixed, and the memory usage of |
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| 233 | Duchamp is considerably less, which will be a help for running it on |
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| 234 | large cubes. The speed of some routines has also been improved, by |
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| 235 | removing unnecessarily repetitive loops. |
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[211] | 236 | |
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[287] | 237 | * The sorting routines have been changed, and should now be slightly quicker |
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[215] | 238 | (and a bit more robust). |
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| 239 | |
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[287] | 240 | * Enabled the scale bar (plotted on the 0th moment map in the spectral |
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| 241 | output file) to be able to deal with much finer spatial scales (as |
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| 242 | may be expected from VLBI data). |
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[211] | 243 | |
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[215] | 244 | * Other minor changes to code and presentation. |
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[211] | 245 | |
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| 246 | |
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[194] | 247 | Duchamp version 1.0.6 (2006/11/01) |
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| 248 | ---------------------------------- |
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| 249 | |
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| 250 | Some incremental improvements and changes to the code: |
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| 251 | |
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| 252 | * The statistics used for the detection are now calculated once for |
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| 253 | the entire cube, rather than being calculated separately for each |
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| 254 | channel map and spectrum. This results in a uniform threshold value |
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| 255 | across the entire cube. The way the statistics calculations are |
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| 256 | implemented in the code was changed, using a new statistics class. |
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| 257 | |
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| 258 | * This means we can report a peak signal-to-noise value for each |
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| 259 | detection. This is given in the text-based output, as well as in the |
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| 260 | summary information above the spectral output for each source. |
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| 261 | |
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[195] | 262 | * The user can now elect not to have the moment map displayed in a |
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| 263 | PGPlot window, through the use of the new flagXOutput |
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| 264 | parameter. This should help in cases of running Duchamp on a dumb |
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| 265 | terminal (with no X-display capabilities), or as part of a batch |
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| 266 | script where the continual popping-up of the PGPlot window might |
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| 267 | become annoying. |
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| 268 | |
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[265] | 269 | * There are different Flags reported for the case of an object lying on |
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[194] | 270 | the spatial edge and spectral edge of the cube (E and S respectively). |
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| 271 | |
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| 272 | * A few minor bug fixes: |
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| 273 | - When providing a subsection, any axes with the range given by * |
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| 274 | had the pixel values offset incorrectly. This has been fixed. |
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| 275 | - Negative searches now correctly invert the reconstructed array |
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| 276 | when it is read in from a file. |
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| 277 | |
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| 278 | * Other minor changes to the code, to improve memory handling and |
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| 279 | remove redundant arrays and variables. |
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| 280 | |
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| 281 | |
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[146] | 282 | Duchamp version 1.0.5 (2006/09/06) |
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[142] | 283 | ---------------------------------- |
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| 284 | |
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[146] | 285 | Since version 1.0, there have been a range of mostly minor |
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| 286 | changes. These are generally bug-fixes, thanks to feedback from a |
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[157] | 287 | number of users, as well as a few extra features. |
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[146] | 288 | |
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[157] | 289 | Here is a summary of the changes since version 1.0: |
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[142] | 290 | |
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[157] | 291 | USER INTERFACE: |
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[146] | 292 | |
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[142] | 293 | * The user is now able to enter the value of flag parameters in the |
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| 294 | parameter file as strings, as well as integers (so one can enter |
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| 295 | true or 1 to give the same result). |
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| 296 | |
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[157] | 297 | GRAPHICAL OUTPUT: |
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| 298 | |
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[142] | 299 | * Added a new function that draws the edge of the blank region on the |
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[146] | 300 | maps and image cutouts. There is a new flag parameter -- |
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| 301 | drawBlankEdges -- that controls the use of this function (the |
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| 302 | default is true). |
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| 303 | Also, the edge of the field is plotted on the image cutouts as a |
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| 304 | yellow line. This distinguishes it from the purple blank pixel |
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| 305 | dividing line. |
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[142] | 306 | |
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[146] | 307 | * The size of the tick mark in the image cutout (indicating the |
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| 308 | spatial scale of the image) is now adaptable, so that it shows the |
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| 309 | scale that best fits the image (ranging from 1 arcsec to 15 |
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| 310 | degrees). (This is a change from the previous standard length of 15 |
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| 311 | arcmin.) |
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[142] | 312 | |
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[113] | 313 | * The zoomed spectrum had its flux scale determined by all points in |
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[146] | 314 | the zoom box,including those flagged by the Milky Way (MW) |
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| 315 | range. This has been fixed so that any MW channels will not affect |
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| 316 | the flux scaling, potentially improving the appearance of objects |
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| 317 | detected close in velocity to strong MW emission or absorption. |
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[112] | 318 | |
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[157] | 319 | * Improved Karma Annotation file output, so that files without good |
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| 320 | WCS are dealt with appropriately. |
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| 321 | |
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| 322 | TEXT-BASED OUTPUT: |
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| 323 | |
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[113] | 324 | * The position resolution in the IAU-format names has been increased, |
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| 325 | so that distinct objects close to one another are more readily |
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| 326 | distinguished. Overlapping sources at different velocities may |
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| 327 | still have the same name, but this is a more general problem. |
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[112] | 328 | |
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[146] | 329 | * The presentation of the results in tabular format has been improved, |
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| 330 | so that the precision of faint sources is sufficient to show their |
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| 331 | flux, for instance, is not 0. This also applies to the information |
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| 332 | presented above the spectral plots. |
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[112] | 333 | |
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[146] | 334 | * Improved error and warning reporting, so that the formatting and |
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| 335 | presentation of information is clearer. |
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| 336 | |
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[157] | 337 | FITS I/O RELATED: |
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| 338 | |
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[172] | 339 | * The previous version was did not deal well with 4 (or greater) |
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| 340 | dimensions in the FITS file -- the memory allocation was badly done, |
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| 341 | and the axes needed to be in a particular order. This has been |
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| 342 | fixed, so that the FITS I/O routines can now handle any sized FITS |
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| 343 | file, with axes in any order (as long as there are two spatial and one |
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| 344 | spectral axes). |
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[157] | 345 | |
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| 346 | * When the FITS file does not have a rest frequency defined, there is |
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| 347 | no way to transform the frequency axis into velocity. In this case, |
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| 348 | the spectral axis is left as frequency, and put into units of MHz. |
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| 349 | |
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[172] | 350 | * If the beam size is not indicated by the FITS header (through the |
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| 351 | BMAJ and BMIN keywords), the user can manually specify the size |
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| 352 | through the parameter file (using parameter beamSize). |
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| 353 | |
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| 354 | * The FITS I/O routines make use of the command fits_file_exists. This |
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| 355 | was introduced into the CFITSIO package from version 2.5, so Duchamp |
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| 356 | will only work with this version or higher. Version 3+ is preferred. |
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| 357 | |
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[157] | 358 | OTHER BUG-FIXING: |
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| 359 | |
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| 360 | * Several bugs related to the blank-pixels were dealt with. |
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| 361 | The correct values were not propagating through correctly, meaning |
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| 362 | that the default values were being used. Also, there was the |
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| 363 | potential for blank pixels to be detected when the FDR method was |
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| 364 | used. Finally, the image cutout displays occasionally did not |
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| 365 | obscure the blank pixels. All these problems should be fixed now. |
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| 366 | |
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| 367 | * The FDR setup routine was occasionally failing with a segmentation |
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| 368 | fault, due to it accessing unallocated memory. This has been fixed. |
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| 369 | |
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| 370 | * Fixed bugs that affected the way 2D images (rather than 3D cubes) |
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| 371 | were dealt with. The minChannels test failed when minChannels=0. |
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| 372 | |
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[165] | 373 | * If there is no beam information in the FITS header, the user can now |
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| 374 | enter a beam size as a parameter. |
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| 375 | |
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[146] | 376 | * Other minor fixes to the code, to improve its structure and |
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| 377 | robustness. |
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| 378 | |
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| 379 | |
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[112] | 380 | Duchamp version 1.0 (2006/06/30) |
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| 381 | -------------------------------- |
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| 382 | |
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[113] | 383 | The first full release version. |
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| 384 | |
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| 385 | Several major changes compared to previous version: |
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| 386 | |
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| 387 | * Incorporated a FitsHeader class, to keep track of header information |
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| 388 | (including WCS) from the FITS file. All units-related calculations |
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| 389 | are done with this class, such as conversion to velocity, and |
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| 390 | pixel-to-WCS conversion. The main advantage of this is improved |
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| 391 | speed of execution, more adaptable to different units, and improved |
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| 392 | code (easier for me!). |
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| 393 | |
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| 394 | * Able to select the dimensionality of the reconstruction, rather than |
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| 395 | just doing it in 3-D. |
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| 396 | |
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| 397 | * Robust text output, so that the columns are sized correctly given |
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| 398 | the data being written, and the relevant units (derived from the |
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| 399 | FITS header) are included in the output table. |
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| 400 | |
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| 401 | * Improved the way the reconstructed image is saved and read back in, |
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| 402 | with a better naming scheme and a better set of new FITS header |
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| 403 | keywords. The MW headers are now not written. |
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| 404 | |
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| 405 | Other, more minor changes include: |
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| 406 | |
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| 407 | * MW channels now not set to 0, but just ignored for searching |
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| 408 | purposes (and for the scaling of the spectral output -- they are |
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| 409 | plotted though and highlighted with a hashed box). |
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| 410 | |
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| 411 | * The scale bar in the moment map in the spectral output file has its |
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| 412 | length indicated. |
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| 413 | |
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| 414 | * Improved VOTable output, with more information about the way Duchamp |
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| 415 | was run. |
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| 416 | |
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| 417 | * Made sure all statistics calculations in the reconstruction are |
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| 418 | based on robust (ie. median) methods. |
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| 419 | |
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| 420 | Also moved to an autoconf based configure/make compilation, for ease of use. |
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| 421 | |
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| 422 | |
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| 423 | Duchamp version 0.9.2 (2006/06/27) |
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| 424 | -------------------------------- |
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| 425 | |
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| 426 | * Added the use of warning flags for detections: for either edge |
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| 427 | location or negative enclosed flux. |
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| 428 | |
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| 429 | * A new command line option added so that the user can specify a FITS |
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| 430 | file to be searched with the default parameters, rather than giving |
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| 431 | a full parameter file. |
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| 432 | |
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| 433 | * The scale bar on the moment cutout now works in general case, using |
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| 434 | an iterative process to get to the correct length. |
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| 435 | |
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| 436 | * RA axes are now done correctly on the full-scale maps. |
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| 437 | |
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| 438 | * Various coding fixes, improving the readability of the code, |
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| 439 | particularly regarding the declaration of temporary variables. |
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| 440 | |
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| 441 | * Changed the way the time of execution is called : now using time.h |
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| 442 | functions, rather than a system call. |
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| 443 | |
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| 444 | * Changed output in Detection/outputDetection.cc for the pixel |
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| 445 | information of detected objects (the info printed above the spectral |
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| 446 | plots) -- now print out number of voxels in object, and have |
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| 447 | improved the formatting a little. |
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| 448 | |
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| 449 | * Improved the functionality of saving the FITS file containing the |
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| 450 | reconstructed array. Added ability to save and read back in the MW |
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| 451 | parameters when saving a reconstructed cube (if a reconstructed cube |
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| 452 | has different MW range to that being considered, it would cause |
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| 453 | problems). ReadRecon now just returns a FAILURE and will reconstruct |
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| 454 | the cube anew. |
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| 455 | |
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| 456 | * Changed default value of flagGrowth to 0. |
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| 457 | |
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| 458 | |
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| 459 | |
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| 460 | Duchamp version 0.9 (2006/05/05) |
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| 461 | -------------------------------- |
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| 462 | |
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| 463 | First public release version. |
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