Changes between Version 21 and Version 22 of Notes/ExampleReduction


Ignore:
Timestamp:
03/31/09 14:48:47 (15 years ago)
Author:
JamieStevens
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • Notes/ExampleReduction

    v21 v22  
    306306
    307307Let's look at some of the restor'd maps now.
     308
     309[[Image(rnovalmc_4668_image.png)]]
     310
     311Above is an image of the field with central frequency 4668 MHz. The ToO target is at RA = 05h40m44.2s Dec = -66d40m11.6.
     312So it seems that we have not detected the target, but there are two other sources apparent in the image. Using
     313NED we can identify these sources as SUMSS J054003-663939 (RA = 05h40m03.7s Dec = -66d39m40s, top right source) and
     314SUMSS J054125-664307 (RA = 05h41m25.2s Dec = -66d43m07s, bottom left source). Let's look at all the images together
     315in the image below.
     316
     317[[Image(rnovalmc_montage.png)]]
     318
     319In this image, the central frequency is increasing in each successive plot to the right and down. We can see here another
     320effect of the increasing central frequency. The two sources are seen to "move" towards the edge of the field in successive
     321images, and this is because the primary beam of the antenna gets smaller with increasing frequency.
     322