Hubble Space Telescope

Hubble Space Telescope COS filenames

COS filenames

Note: The COS files names are all starting with the letter 'L'

Note: The 9th character of an association of simple observation is always '0' at CADC

Note: Please consult the full documentation Here

COS data utilizes a modified naming convention from other HST instruments. In, particular COS FUV files can have TWO suffixes. The first suffix identifies the filetype and the second suffix if present identifies the FUV detector segment. For the remainder of this document the use of "suffix" will refer to the first suffix which identifies the filetype and will always include filetypes with the additional FUV segment suffix if they exist.

CADC file names File Suffix Description Units Type Access Example
lxxxxxxx_rawaccum.fits _RAWACCUM.FITS Raw NUV ACCUM image RAW la8p01frq_rawaccum.fits
lxxxxxxx_asn.fits _ASN.FITS Association file RAW lb2a13030_asn.fits
lxxxxxxx_trl.fits _TRL.FITS Trailer file with a historical record of generic conversion processing RAW lb2a13zgq_trl.fits
lxxxxxxx_spt.fits _SPT.FITS Support, planning and telemetry information RAW lb2a13zgq_spt.fits
lxxxxxxx_rawtag_a.fits
lxxxxxxx_rawtag_b.fits
_RAWTAG_A.FITS
_RAWTAG_B.FITS
Raw FUV ACCUM image RAW lb2a13zgq_rawtag_a.fits
lxxxxxxx_corrtag_a.fits
lxxxxxxx_corrtag_b.fits
_CORRTAG_A.FITS
_CORRTAG_B.FITS
FUV TIME-TAG events list with calibrated values CAL lb2a13zgq_corrtag_a.fits
lxxxxxxx_corrtag.fits _CORRTAG.FITS NUV TIME-TAG events list with calibrated values CAL la8p01frq_corrtag.fits
lxxxxxxx_flt.fits _FLT.FITS NUV flat-fielded science image CAL la8p01frq_rawaccum.fits
lxxxxxxx_flt_a.fits
lxxxxxxx_flt_b.fits
_FLT_A.FITS
_FLT_B.FITS
FUV flat-fielded science image CAL lb2a13zgq_flt_a.fits
lxxxxxxx_fltsum.fits _FLTSUM.FITS Summed flat-fielded image (imaging only). Final calibrated association product for all COS imaging datasets CAL la8p011p0_fltsum.fits
lxxxxxxxx_lampflash.fits _LAMPFLASH.FITS 1-D extracted TAGFLASH (FLASH=yes) spectra CAL lb2a13zgq_lampflash.fits
lxxxxxxxx_x1dsum3.fits _X1DSUM3.FITS Averaged 1-D extracted spectra for multiple exposures with the same grating, central wavelength, aperture and FP-POS="n" CAL lb2a13030_x1dsum3.fits
lxxxxxxxx_x1dsum.fits _X1DSUM.FITS Final combined 1-D extracted spectra for multiple exposures with the same grating, central wavelength and aperture combining all FP-POS. Final calibrated association product for all COS spectroscopic datasets. CAL lb2a13030_x1dsum.fits
lxxxxxxxx_x1d.fits _X1D.FITS 1-D extracted spectra for a single exposure CAL lb2a13zgq_x1d.fits
lxxxxxxx_prev.fits _PREV.FITS Preview in FITS format PREVIEW la8p01frq_prev.fits
lxxxxxxx_prev.png _PREV.PNG Preview in PNG format PREVIEW la8p01frq_prev.png
lxxxxxxx_jitter.png _JITTER.PNG Graphical representation of the JITTER information OMS la8p01frq_jitter.png