export in FITS format

[herpin@…]

Hi As we are more familiar with CLASS software we intend to export the rpfits data via ASAP in a FITS format readable by CLASS. But the only format available is SDFITS which can't be read by CLASS. Having the possibility to export in a more common format like FITS would be very very useful (of course with all the header informations).

Moreover, the following informations are missing or impossible through ASAP:

• image band frequency
• RA/DEC of the source
• LST time

Thanks

[Malte Marquarding]

Hi,

unfortunately FITS is not as standard as it should be, specifically CLASS FITS. I had plenty of discussion with other people and previous versions of ASAP did export to FITS, but bottom line was that you would need to set a few other CLASS header parameters by hand anyway, so just use ASCII export with appropriate header items.

Time, position are already available in the ASCII header. I don't know what you mean by image band frequency. Do you mean the reference value, that alone wouldn't be enough (refpix and increment are also necessary). The abcissa values are already in the unit you ghave selected in ASAP.

[Malte Marquarding]

In the next release, the frequency set-up will be part of the ASCII header.

[Malte Marquarding]

Gary Fuller was kind enough to give me some ideas. Attached is the tarball of his work. I need to incorporate this into ASAP.

[Malte Marquarding]

ASAP can now export to CLASS specific FITS format scantable.save(name ='xyz.fits',format="CLASS")

[Malte Marquarding]

FITS header items are not yet satisfactory.

[Malte Marquarding]

Have added several fits header items like tsys