History Keyword

PypeIt will update the HISTORY keyword in the FITS header with information about how a file was created and what raw data the file was reduced from.

Each history entry will start with a date in ISO 8601 format and the string PypeIt. Because of the limited length allowed in the FITS standard, entries may wrap to the next HISTORY keyword. To make it easier to detect if this has happened to a filename, all filenames are wrapped in double quotes ".

Examples

Reduction:

HISTORY 2021-03-05T23:56 PypeIt Reducing target HIP15339
HISTORY Combining frames:
HISTORY "S20161108S0087.fits.gz"
HISTORY "S20161108S0090.fits.gz"
HISTORY Subtracted background from frames:
HISTORY "S20161108S0088.fits.gz"
HISTORY "S20161108S0089.fits.gz"
HISTORY Callibration frames:
HISTORY arc,science,tilt "S20161108S0069.fits.gz"
HISTORY arc,science,tilt "S20161108S0070.fits.gz"
HISTORY arc,science,tilt "S20161108S0071.fits.gz"
HISTORY arc,science,tilt "S20161108S0072.fits.gz"
HISTORY pixelflat,trace "S20161108S0078.fits.gz"

Coadding:

HISTORY 2021-01-23T02:12 PypeIt Coadded 4 objects from 3 spec1d files
HISTORY File 0 "spec1d_DE.20170425.53065-dra11_DEIMOS_2017Apr25T144418.240.fits"
HISTORY File 1 "spec1d_DE.20170425.51771-dra11_DEIMOS_2017Apr25T142245.350.fits"
HISTORY File 2 "spec1d_DE.20170425.50487-dra11_DEIMOS_2017Apr25T140121.014.fits"
HISTORY Object ID SPAT0692-SLIT0704-DET08 from file 0
HISTORY Object ID SPAT0695-SLIT0706-DET04 from file 2
HISTORY Object ID SPAT0691-SLIT0704-DET08 from file 2
HISTORY Object ID SPAT0695-SLIT0706-DET04 from file 1

Fluxing:

HISTORY 2021-03-09T01:21 PypeIt Flux calibration "sens_b24-Feige66_KASTb_2015May
HISTORY 20T041246.960.fits"