Name: spPlate-YYYY-ZZZZZ.fits, where YYYY is the plate ID and ZZZZZ is the MJD the plate was observed. If the same mapping of this plate was observed on several nights, then this MJD corresponds to the last night it was observed.
Produced by: spectro2d
Used by: spectro1d
Archived? Yes. Tracked file.
In summary, this file contains the following:
HDU #0 = Flux in units of 10^(-17) erg/cm/s/Ang [FLOAT] HDU #1 = Inverse variance (1/sigma^2) for the above [FLOAT] HDU #2 = AND mask [32-bit INT] HDU #3 = OR mask [32-fit INT] HDU #4 = RMS resolution at each pixel (=FWHM/2.35) in pixels [FLOAT] HDU #5 = Plug-map structure from plPlugMapM file [BINARY FITS TABLE] HDU #6 = S/N vectors for g,r,i [FLOAT] HDU #7 = Synthetic magnitude g,r,i Vectors [FLOAT] HDU #8 = SN_SCI, SN_SMEAR, and 3 legendre coefficients of smear correction (not applied) [BINARY FITS TABLE]
SIMPLE = T / FIT STANDARD BITPIX = -32 / FITS BITS/PIXEL NAXIS = 2 / NUMBER OF AXES NAXIS1 = 3849 / WIDTH (TOTAL!) NAXIS2 = 640 / HEIGHT (TOTAL!) EXTEND = T / TAI = 4474845874.54 / 1st row - Number of seconds since Nov 17 1858 RA = 261.30167 / 1st row - Right ascension of telescope boresigh DEC = 60.926492 / 1st row - Declination of telescope boresight (d EQUINOX = 2000.00 / RADECSYS= 'FK5 ' / AZ = 212.819513333 / 1st row - Azimuth (encoder) of tele (0=N?) (de ALT = 48.0575580000 / 1st row - Altitude (encoder) of tele (de AIRMASS = 1.28831 / FOCUS = -999999999999.999999 / 1st row - Focus piston (microns?) DATE-OBS= '2000-09-05' / 1st row - TAI date TAIHMS = '04:27:02.14' / 1st row - TAI time (HH:MM:SS.SS) (TAI-UT = appr TIMESYS = 'tai ' / TAI, not UTC TAI-BEG = 4474843863.00 / Exposure Start Time TAI-END = 4474846879.00 / Exposure End Time MJD = 51792 / MJD of observation MJDLIST = '51792 ' / VERSION = 'v3_17_5_4' / version of IOP CAMVER = 'SPEC2 v4_5' / Camera code version OBSERVER= 'sjnk ' OBSCOMM = 'science ' TELESCOP= 'SDSS 2.5-M' / Sloan Digital Sky Survey NEXP = 12 / Number of exposures in this file EXPID00 = 'b1-51792-00006429-00006426-00006427' / ID string for exposure 0 EXPID01 = 'b1-51792-00006430-00006426-00006427' / ID string for exposure 1 EXPID02 = 'b1-51792-00006431-00006437-00006427' / ID string for exposure 2 EXPID03 = 'b2-51792-00006429-00006426-00006427' / ID string for exposure 3 EXPID04 = 'b2-51792-00006430-00006426-00006427' / ID string for exposure 4 EXPID05 = 'b2-51792-00006431-00006437-00006427' / ID string for exposure 5 EXPID06 = 'r1-51792-00006429-00006426-00006438' / ID string for exposure 6 EXPID07 = 'r1-51792-00006430-00006426-00006438' / ID string for exposure 7 EXPID08 = 'r1-51792-00006431-00006437-00006438' / ID string for exposure 8 EXPID09 = 'r2-51792-00006429-00006426-00006438' / ID string for exposure 9 EXPID10 = 'r2-51792-00006430-00006426-00006438' / ID string for exposure 10 EXPID11 = 'r2-51792-00006431-00006437-00006438' / ID string for exposure 11 EXPT_B1 = 2700.00 / b1 camera exposure time (seconds) EXPT_B2 = 2700.00 / b2 camera exposure time (seconds) EXPT_R1 = 2700.00 / r1 camera exposure time (seconds) EXPT_R2 = 2700.00 / r2 camera exposure time (seconds) EXPTIME = 2700.00 / Minimum of exposure times for all cameras SPCOADD = 'Fri Jun 28 15:25:10 2002' / SPCOADD finished FLAVOR = 'science ' / Flavor of this sequence (e.g., dome flat, etc.) QUALITY = 'unknown ' / night/image quality RADEG = 2.61302400000000E+02 / Right Ascension. (degrees) DECDEG = 6.09272200000000E+01 / Declination. (degrees) PLATEID = 354 / Plate Id TILEID = 153 / Tile Id CARTID = 2 /Cartridge used in this plugging REDDEN = '0.1291 0.0950 0.0689 0.0522 0.0370' / Median reddening vector for pla MAPID = 5179001 / Map Id NAME = '0354-51790-01' / Name of target; PlateId-MJD-Mapper ReRun NGUIDE = 27.0000 / Number of guider frames during exposure SEEING20= 1.40667 / 20% seeing during exposure (arcsec) SEEING50= 1.50333 / 50% seeing during exposure (arcsec) SEEING80= 1.65667 / 80% seeing during exposure (arcsec) RMSOFF20= 0.308173333333 / 20% RMS offset of guide fibers (arcsec) RMSOFF50= 0.430279000000 / 50% RMS offset of guide fibers (arcsec) RMSOFF80= 0.549163333333 / 80% RMS offset of guide fibers (arcsec) COLBIN = 1 / Binning factor perpendicular to the columns ROWBIN = 1 / Binning factor perpendicular to the rows PROGRAM = 'binning 1 1 ' / Identifying name for CCD program SECFOCUS= -3.0000000000000E+02 / Secondary Mirror Position as reported by TCC GUIDEIMG= '/data/spectro/guider/gimg0084.fits' / Last archived guider image WTIME = 968128309.000 / weatherData(timeStamp) AIRTEMP = 16.8000000000 / weatherData(airtemp) DEWPOINT= -0.433333333333 / weatherData(dewpoint) DEWDEP = 17.2333333333 / weatherData(dewpointDep) DUSTA = 85468.0000000 / weatherData(dusta) DUSTB = 957.333333333 / weatherData(dustb) DUSTC = 99940.0000000 / weatherData(dustc) DUSTD = 955.333333333 / weatherData(dustd) GUSTD = 1.32300000000000E+02 / weatherData(gustd) GUSTS = 21.7000000000 / weatherData(gusts) HUMIDITY= 30.9333333333 / weatherData(humidity) HUMIDOUT= 30.6666666667 / weatherData(humidout) PRESSURE= 21.7000000000 / weatherData(pressure) WINDD = 132.000000000 / weatherData(windd) WINDS = 17.5333333333 / weatherData(winds) TEMP01 = -93.6200000000 / CCD 01 Temperature TEMP02 = -93.3600000000 / CCD 02 Temperature TEMP03 = -92.5800000000 / CCD 03 Temperature TEMP04 = -92.8400000000 / CCD 04 Temperature AZ_OFF = 0.00000000000000E+00 / Azimuth Offset (Diamond Pointing) ALT_OFF = 0.00000000000000E+00 / Altitude Offset (Diamond Pointing) AUTHOR = 'Scott Burles & David Schlegel' / VERSIDL = '5.4 ' / Version of IDL VERSUTIL= 'v4_9_7 ' / Version of idlutils VERSREAD= 'v4_9_8 ' / Version of idlspec2d for pre-processing raw dat VERS2D = 'v4_9_8 ' / Version of idlspec2d for 2D reduction VERSCOMB= 'v4_9_8 ' / Version of idlspec2d for combining multiple spe VERSLOG = 'Unknown ' / Version of SPECLOG product VERSFLAT= 'v1_4 ' / Version of SPECFLAT product OPBC = 'opBC-50000.par' / OPCONFIG= 'opConfig-50000.par' / OPECALIB= 'opECalib-51577.par' / XSIGMA = 0.947553247927 / XSIGMIN = 0.842633000000 / XSIGMAX = 1.11480998993 / WSIGMA = 0.937792500000 / WSIGMIN = 0.898409000000 / WSIGMAX = 0.988289000000 / PLUGFILE= 'plPlugMapM-0354-51790-01.par' / LAMPLIST= 'lamphgcdne.dat' / SKYLIST = 'skylines.dat' / HELIO_RV= 3.38344063555 / Heliocentric correction (added to velocities) VACUUM = T / Wavelengths are in vacuum SFLATTEN= T / Superflat has been applied PSFSKY = 3 / Order of PSF skysubtraction SKYCHI2 = 0.967572500439 / Mean chi^2 of sky-subtraction SCHI2MIN= 0.931639000000 / SCHI2MAX= 1.01598000526 / PREJECT = 0.200000 / Profile area rejection threshold SPEC1_G = 19.9614 /(S/N)^2 for spec 1 at mag 20.20 SPEC1_R = 30.2269 /(S/N)^2 for spec 1 at mag 20.25 SPEC1_I = 25.6335 /(S/N)^2 for spec 1 at mag 19.90 SPEC2_G = 18.0590 /(S/N)^2 for spec 2 at mag 20.20 SPEC2_R = 28.4687 /(S/N)^2 for spec 2 at mag 20.25 SPEC2_I = 23.9591 /(S/N)^2 for spec 2 at mag 19.90 LOWREJ = 5 / Extraction: low rejection HIGHREJ = 8 / Extraction: high rejection SCATPOLY= 5 / Extraction: Order of scattered light polynomial PROFTYPE= 3 / Extraction profile: 1=Gaussian NFITPOLY= 1 / Extraction: Number of parameters in each profil XCHI2 = 1.38691 / Extraction: Mean chi^2 XCHI2MIN= 1.20964 / XCHI2MAX= 1.66991 / ROFFSET1= 0.0261908 /Mean r-band mag difference (spectro - photo) RSIGMA1 = 0.0648688 /Stddev of r-band mag difference (spectro - photo GROFF1 = 0.114613 /Mean (g-r) color difference (spectro - photo) GRSIGMA1= 0.200775 /Stddev of (g-r) color difference (spectro - phot ROFFSET2= 0.0129974 /Mean r-band mag difference (spectro - photo) RSIGMA2 = 0.0450179 /Stddev of r-band mag difference (spectro - photo GROFF2 = -0.00129504 /Mean (g-r) color difference (spectro - photo) GRSIGMA2= 0.0852536 /Stddev of (g-r) color difference (spectro - phot NWORDER = 2 / Linear-log10 coefficients WFITTYPE= 'LOG-LINEAR' / Linear-log10 dispersion COEFF0 = 3.57920000000 / Central wavelength (log10) of first pixel COEFF1 = 0.000100000000000 / Log10 dispersion per pixel UNAME = 'fnpc73 ' / SMEARUSE= T / Smear image used? TSOBJNAM= 'tsObj-0595-52023-02.fit' / Name of tsObj file used SFD_USED= T / SFD dust maps used? XYGRSIG1= 0.0514657 / Sigma of (g-r) offsets as a fcn of plate x/y XYGRSIG2= 0.0363202 / Sigma of (g-r) offsets as a fcn of plate x/y MPGRSIG1= 0.0346769 / Sigma of (g-r)_model - (g-r)_photo Spec 1 MPGRSIG2= 0.0280914 / Sigma of (g-r)_model - (g-r)_photo Spec 2 MPGROFF1= 0.0627630 / Mean of (g-r)_model - (g-r)_photo of Spec 1 MPGROFF2= 0.0108098 / Mean of (g-r)_model - (g-r)_photo of Spec 2 FBADPIX = 0.0189197 / Fraction of bad pixels FBADPIX1= 0.0178169 / Fraction of bad pixels on spectro-1 FBADPIX2= 0.0200191 / Fraction of bad pixels on spectro-2 WAT0_001= 'system=linear' / WAT1_001= 'wtype=linear label=Wavelength units=Angstroms' / CRVAL1 = 3.57920000000 / Central wavelength (log10) of first pixel CD1_1 = 0.000100000000000 / Log10 dispersion per pixel CRPIX1 = 1 / Starting pixel (1-indexed) CTYPE1 = 'LINEAR ' / DC-FLAG = 1 / Log-linear flag BUNIT = '10E-17 erg/cm/s/Ang' / END
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = -32 / NAXIS = 2 / NAXIS1 = 3848 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group WAT0_001= 'system=linear' / WAT1_001= 'wtype=linear label=Wavelength units=Angstroms' / CRVAL1 = 3.57980000000 / Central wavelength (log10) of first pixel CD1_1 = 0.000100000000000 / Log10 dispersion per pixel CRPIX1 = 1 / Starting pixel (1-indexed) CTYPE1 = 'LINEAR ' / DC-FLAG = 1 / Log-linear flag END
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = 32 / NAXIS = 2 / NAXIS1 = 3848 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group WAT0_001= 'system=linear' / WAT1_001= 'wtype=linear label=Wavelength units=Angstroms' / CRVAL1 = 3.57980000000 / Central wavelength (log10) of first pixel CD1_1 = 0.000100000000000 / Log10 dispersion per pixel CRPIX1 = 1 / Starting pixel (1-indexed) CTYPE1 = 'LINEAR ' / DC-FLAG = 1 / Log-linear flag END
There are two masks, an "AND" mask and an "OR" mask. The spectra are constructed from 3 or more 15-minute observations, and the "AND" mask bits are set if that bit is set for each and every input observation. The "OR" mask bits are set if that bit is set for any of the observations.
The mask bits are set as follows:
0 NOPLUG Fiber not listed in plugmap file
1 BADTRACE Bad trace from routine TRACE320CRUDE
2 BADFLAT Low counts in fiberflat
3 BADARC Bad arc solution
4 MANYBADCOLUMNS >10% pixels are bad columns
5 MANYREJECTED >10% pixels are rejected in extraction
6 LARGESHIFT Large spatial shift between flat and object pos'n
7 BADSKYFIBER Sky Fiber shows extreme residuals
8 NEARWHOPPER Within 2 fibers of a whopping fiber (inclusive)
10 SMEARIMAGE Smear available for red and blue cameras
11 SMEARHIGHSN S/N sufficient for full smear fit
12 SMEARMEDSN S/N only sufficient for scaled median fit
16 NEARBADPIXEL Bad pixel within 3 pixels of trace
17 LOWFLAT Flat field less than 0.5
18 FULLREJECT Pixel fully rejected in extraction (INVVAR=0)
19 PARTIALREJECT Some pixels rejected in extraction
20 SCATTEREDLIGHT Scattered light significant
21 CROSSTALK Cross-talk significant
22 NOSKY Sky level unknown at this wavelength (INVVAR=0)
23 BRIGHTSKY Sky level > flux + 10*(flux_err)
AND sky > 1.25 * median(sky,99 pixels)
24 NODATA No data available in combine B-spline (INVVAR=0)
25 COMBINEREJ Rejected in combine B-spline
26 BADFLUXFACTOR Low flux-calibration or flux-correction factor
27 BADSKYCHI Chi^2 > 4 in sky residuals at this wavelength
28 REDMONSTER Contiguous region of bad chi^2 in sky residuals
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = 32 / NAXIS = 2 / NAXIS1 = 3848 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group WAT0_001= 'system=linear' / WAT1_001= 'wtype=linear label=Wavelength units=Angstroms' / CRVAL1 = 3.57980000000 / Central wavelength (log10) of first pixel CD1_1 = 0.000100000000000 / Log10 dispersion per pixel CRPIX1 = 1 / Starting pixel (1-indexed) CTYPE1 = 'LINEAR ' / DC-FLAG = 1 / Log-linear flag END
Contains the RMS resolution at each pixel in units of pixels. To
get the FWHM resolution, multiply the pixel values by sqrt(8*ln(2))
∼ 2.35. Since the spectra are binned with constant logarithmic
dispersion, the pixel size is fixed in velocity space at 69 km/s =
ln(10) * c * 0.0001, where 0.0001 is the log10 dispersion
per pixel (stored in the header field CD1_1). To convert
to resolution in wavelength units, multiply by the local pixel size in
wavelength units, which is ln(10) * lambda * 0.0001 where lambda is
the wavelength of the pixel and 0.0001 is again the log10 dispersion.
The dimensions are the same as the primary HDU.
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = -32 / NAXIS = 2 / NAXIS1 = 3848 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group WAT0_001= 'system=linear' / WAT1_001= 'wtype=linear label=Wavelength units=Angstroms' / CRVAL1 = 3.57980000000 / Central wavelength (log10) of first pixel CD1_1 = 0.000100000000000 / Log10 dispersion per pixel CRPIX1 = 1 / Starting pixel (1-indexed) CTYPE1 = 'LINEAR ' / DC-FLAG = 1 / Log-linear flag END
XTENSION= 'BINTABLE' /Binary table written by MWRFITS BITPIX = 8 /Required value NAXIS = 2 /Required value NAXIS1 = 169 /Number of bytes per row NAXIS2 = 640 /Number of rows PCOUNT = 0 /Normally 0 (no varying arrays) GCOUNT = 1 /Required value TFIELDS = 16 /Number of columns in table COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = '5J ' / TFORM2 = '6A ' / TFORM3 = 'D ' / TFORM4 = 'D ' / TFORM5 = '5E ' / TFORM6 = 'E ' / TFORM7 = 'E ' / TFORM8 = 'E ' / TFORM9 = '19A ' / TFORM10 = 'D ' / TFORM11 = 'D ' / TFORM12 = 'J ' / TFORM13 = 'J ' / TFORM14 = 'J ' / TFORM15 = 'J ' / TFORM16 = 'J ' / TFORM17 = '5J ' / TFORM18 = '5J ' / COMMENT COMMENT *** Column Names *** COMMENT TTYPE1 = 'OBJID ' / TTYPE2 = 'HOLETYPE ' / TTYPE3 = 'RA ' / TTYPE4 = 'DEC ' / TTYPE5 = 'MAG ' / TTYPE6 = 'STARL ' / TTYPE7 = 'EXPL ' / TTYPE8 = 'DEVAUCL ' / TTYPE9 = 'OBJTYPE ' / TTYPE10 = 'XFOCAL ' / TTYPE11 = 'YFOCAL ' / TTYPE12 = 'SPECTROGRAPHID ' / TTYPE13 = 'FIBERID ' / TTYPE14 = 'THROUGHPUT ' / TTYPE15 = 'PRIMTARGET ' / TTYPE16 = 'SECTARGET ' / TTYPE17 = 'TSOBJID' / TTYPE18 = 'TSOBJ_MAG ' / COMMENT COMMENT *** End of required fields *** COMMENT END
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = -32 / NAXIS = 2 / NAXIS1 = 3 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group END
XTENSION= 'IMAGE ' / IMAGE extension BITPIX = -32 / NAXIS = 2 / NAXIS1 = 3 / NAXIS2 = 640 / PCOUNT = 0 / No Group Parameters GCOUNT = 1 / One Data Group END
XTENSION= 'BINTABLE' /Binary table written by MWRFITS BITPIX = 8 /Required value NAXIS = 2 /Required value NAXIS1 = 20 /Number of bytes per row NAXIS2 = 640 /Number of rows PCOUNT = 0 /Normally 0 (no varying arrays) GCOUNT = 1 /Required value TFIELDS = 16 /Number of columns in table COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = '1E ' / TFORM2 = '1E ' / TFORM3 = '3E ' / COMMENT COMMENT *** Column Names *** COMMENT TTYPE1 = 'SCI_SN ' / TTYPE2 = 'SMEAR_SN' / TTYPE3 = 'LEGENDRE_COEFF ' / COMMENT COMMENT *** End of required fields *** COMMENT END