====================== PROTODESI_FPC ====================== :Summary: Data model for protoDESI Fiber Photometry Camera images for ProtoDESI. :Naming Convention: ``PROTODESI_FPC_{EXPID}.fits``, where ``{EXPID}`` is the 8-digit exposure ID. :Regex: ``PROTODESI_FPC_[0-9]{8}.fits`` *Give a regular expression for this filename. For example, a six-digit number would correspond to ``[0-9]{6}``.* :File Type: FITS, 16 MB *This section gives the type of the file and its approximate size.* Contents ======== ====== ======= ======================== =================== Number EXTNAME Type Contents ====== ======= ======================== =================== HDU0_ PRIMARY NPIX1xNPIX2 float image Raw image ====== ======= ======================== =================== FITS Header Units ================= HDU0 ---- EXTNAME = PRIMARY Raw image Header Keywords (dump) ~~~~~~~~~~~~~~~~~~~~~~ ======== ======================================== ===== ============================================== KEY Example Value Type Comment ======== ======================================== ===== ============================================== NAXIS1 3352 int length of data axis 1 NAXIS2 2532 int length of data axis 2 BZERO 32768 int offset data range to that of unsigned short BSCALE 1 int default scaling factor or unsigned short DEVICE FPC str imaging device DATE-OBS 2016-08-17T17:49:22.235092 str datetime at observation start (UTC) TIME-OBS 17:49:22.235092 str time at observation start (UTC) MJD-OBS 57617.74261846 float MJD at observation start OPENSHUT 2016-08-17T17:49:22.235092 str time at shutter open (UTC) LST 08:09:06.860 str LST at observation start (HH:mm:ss.ss) EXPREQ 1.0 float [s] Requested Exposure duration, also defined as REQTIME FILENAME /data/images/PROTODESI_FPC_00000050.fits str absolute path of file on desirpi1 CCDTEMP -1.907 float CCD temperature **before or after exposure?** CCDSET -9.788 float setpoint of CCD TEC CCDPOWER 100.0 float cooling power of TEC TECFROZE F bool whether TEC is frozen or not INSTRUME PROTODESI str instrument EXPNUM 50 int exposure ID CCDCOOL T bool whether TEC is enabled or not CHECKSUM R2QLS1OIR1OIR1OI str HDU checksum updated 2016-08-17T17:49:25 DATASUM 2903024359 str data unit checksum updated 2016-08-17T17:49:25 ======== ======================================== ===== ============================================== Other Header Keywords (not currently present) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ======== ======================================== ===== ============================================== KEY Example Value Type Comment ======== ======================================== ===== ============================================== XTENSION BINTABLE, IMAGE str binary table written by MWRFITS v1.8 BITPIX 16 int required value NAXIS 2 int required value PCOUNT 0 int normally 0 (no varying arrays) GCOUNT 1 int required value TFIELDS int number of columns in table TIMESYS UTC str time system EXPTIME 1500.1 float measured exposure time CCDBIN1 1 int pixel binning, axis 1 CCDBIN2 1 int pixel binning, axis 2 TELEQUIN 2000.0 float equinox of telescope coordinates TELRA 19:17:34.440 str [HH:MM:SS] telescope RA RA 19:17:34.440 str [HH:MM:SS] RA TELDEC 20:39:59.760 str [DD:MM:SS] telescope DEC DEC 00:00:48.240 str [DD:MM:SS] DEC HA 20:39:59.760 str [HH:MM:SS] telescope hour angle ZD 30.7000 float [deg] telescope zenith distance AIRMASS 1.1620 float Airmass TELFOCUS 1.22, 145.3, 2.9, 4300.1, 0.2,0.0 str DESI hexapod settings TELSTAT Track str telescope tracking status FIELDID 2321 int DESI field identifier OBSTYPE object str observation type: zero, dark, dome flat, sky flat, object, test, calibration, guider SEQID 4x4 dither str sequence name SEQNUM 2 int number of image in sequence SEQTOT 16 int total number of images in sequence ======== ======================================== ===== ============================================== ======== ======================================== ===== ============================================== KEY Example Value Type Comment ======== ======================================== ===== ============================================== F0-RA float fiber 0 RA F0-DEC float fiber 0 DEC F1-RA float fiber 1 RA F1-DEC float fiber 1 DEC F2-RA float fiber 2 RA F2-DEC float fiber 2 DEC FIPOS T bool fiber positioner data available if true CYCLES 3 int number of positioner iterations ONTARGET 3 int number of fibers on target FAILED 5 int number of failed fiber assignments MAXRES 12.5 float [micron] maximum target-fiber position residual ======== ======================================== ===== ============================================== ======== ======================================== ===== ============================================== KEY Example Value Type Comment ======== ======================================== ===== ============================================== GS-FILE str guide Star filename GS-RA float guide ref pixel RA GS-DEC float guide ref pixel DEC GS-X float guide ref pixel X GS-Y float guide ref pixel Y ======== ======================================== ===== ============================================== ======== ======================================== ===== ============================================== KEY Example Value Type Comment ======== ======================================== ===== ============================================== GUIDER 1 int guider (0-absent,1-ok,2-lost star,3-lost all stars) G-MODE auto str guider operation mode G-CCDNUM 4 int number of active guide CCDs G-FEEDBK 0.75 float guider feedback percentage G-MEANX 0.1 float Guider x-axis mean offsets G-MEANY 0.2 float Guider y-axis mean offsets G-MEANX2 12.1 float Guider x-axis second moment mean offsets G-MEANY2 12.1 float Guider y-axis second moment mean offsets G-MEANXY 12.1 float Guider cross-axis second moment mean offsets G-MAXX 0.9 float Guider x-axis maximum offset G-MAXY 0.9 float Guider y-axis maximum offset G-FLXVAR 12.4 float Guide stars flux variance G-TRANSP 0.8 float Guider average sky transparency G-SEEING 0.5 float [arcsec] Guider average seeing G-LATENC 0.15 float [s] Guider average latency between exposures G-EXPTIM 0.5 float [s] Guider average exposure time ======== ======================================== ===== ============================================== Data: FITS image [int16, 3352x2532] Notes and Examples ================== The missing keywords listed above in the Other Keywords section, grouped roughly by categories, are either found in an older version of data model, or defined in DESI-1229 and deemed relevant for protoDESI run. While this data model is up to date, FPC and GFA images may not be in their final shape and are subject to change.