==== thru ==== :Summary: Throughput data file. :Naming Convention: ``thru-{ARM}.fits``, where ``{ARM}`` is 'b', 'r', 'z'. :Regex: ``thru-[brz]\.fits`` :File Type: FITS, 1 MB Contents ======== ====== ========== ======== ============================= Number EXTNAME Type Contents ====== ========== ======== ============================= HDU0_ PRIMARY IMAGE Empty HDU1_ THROUGHPUT BINTABLE Throughput model HDU2_ FIBERINPUT BINTABLE Geometric loss at fiber input ====== ========== ======== ============================= FITS Header Units ================= HDU0 ---- EXTNAME = PRIMARY This HDU has no non-standard required keywords. Empty HDU. HDU1 ---- EXTNAME = THROUGHPUT Throughput model. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ ======== ================= ===== ======================================= KEY Example Value Type Comment ======== ================= ===== ======================================= NAXIS1 32 int length of dimension 1 NAXIS2 24651 int length of dimension 2 EXPTIME 1000.0 float default exposure time [sec] GEOMAREA 86787.09421000001 float geometric area of mirror - obscurations FIBERDIA 1.52 float average fiber diameter [arcsec] WAVEMIN 3533 int Minimum wavelength [Angstroms] WAVEMAX 5998 int Maximum wavelength [Angstroms] EXTNAME THROUGHPUT str extension name ======== ================= ===== ======================================= Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ========== ======= ======== =========== Name Type Units Description ========== ======= ======== =========== wavelength float64 Angstrom Wavelengths throughput float64 Throughput losses not due to atmosphere or fiber inputs extinction float64 Atmospheric extinction fiberinput float64 DEPRECATED; fiber input losses (point-source?) ========== ======= ======== =========== HDU2 ---- EXTNAME = FIBERINPUT Typical fiber input geometric throughput for various object types. 0 = no transmission; 1 = all light makes it into the fibers. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ ======= ============= ==== ===================== KEY Example Value Type Comment ======= ============= ==== ===================== NAXIS1 40 int length of dimension 1 NAXIS2 24651 int length of dimension 2 EXTNAME FIBERINPUT str extension name ======= ============= ==== ===================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ========== ======= ======== =========== Name Type Units Description ========== ======= ======== =========== wavelength float64 Angstrom Wavelengths at which loss is modeled elg float64 throughput for typical ELG lrg float64 throughput for typical LRG star float64 throughput for typical point source sky float64 throughput for uniform source ========== ======= ======== ===========