SIMPLE = T / FITS STANDARD BITPIX = 8 / Binary Data NAXIS = 0 / No image data array present EXTEND = T / There may be standard extensions DATE = '17/11/97' / Date file was written ORIGIN = 'ASC ' / Organization creating file FILENAME= 'null_image ' / ZERO LENGTH DUMMY IMAGE COMMENT COMMENT ACIS gain parameter file, for conversion of PHA to PI COMMENT MISSION = 'AXAF ' / Advanced X-ray Astrophysics Facility TELESCOP= 'AXAF ' / Telescope used INSTRUME= 'ACIS ' / AXAF CCD Imaging Spectrometer CREATOR = 'ACIS_cal_hack' / Program creating this file ASCVER = 'ACIS_cal_0.1' / Format spec for this file HISTORY Checkered. HISTORY Gain coefficients originally derived from Steve Bukowski's TaxDay97 HISTORY (4/15/97, just-pre-phase-H-XRCF) analysis of flight CCDs with flight HISTORY electronics. HISTORY (See file: /nfs/coeus/d2/jhk/SDS/memos/ACIScal/flightCCDs_gain) HISTORY Mark C-D produced a STSDAS table from Steve's results. HISTORY JHK converted to FITS, added a few header keywords and this HISTORY history...and voila! END XTENSION= 'TABLE ' / Ascii table extension BITPIX = 8 / 8-bits per 'pixels' NAXIS = 2 / Simple 2-D matrix NAXIS1 = 58 / Number of characters per row NAXIS2 = 40 / The number of rows PCOUNT = 0 / No 'random' parameters GCOUNT = 1 / Only one group TFIELDS = 4 / Number of fields per row EXTNAME = 'acis_gain.tab' / Name of table TTYPE1 = 'ccd_id ' / TBCOL1 = 1 / TFORM1 = 'I12 ' / TUNIT1 = 'none ' / TDISP1 = 'I3 ' / %3d TTYPE2 = 'ccdnode ' / TBCOL2 = 14 / TFORM2 = 'I12 ' / TUNIT2 = 'none ' / TDISP2 = 'I3 ' / %3d TTYPE3 = 'gain ' / TBCOL3 = 27 / TFORM3 = 'E15.7 ' / TUNIT3 = 'eV/ADU ' / TDISP3 = 'F8.5 ' / %8.5f TTYPE4 = 'offset ' / TBCOL4 = 43 / TFORM4 = 'E15.7 ' / TUNIT4 = 'eV ' / TDISP4 = 'F8.3 ' / %8.3f GAIN0 = 3.8461 / average gain of CCD 0 OFFSET0 = -6.058 / average offset of CCD 0 GAIN1 = 3.8628 / average gain of CCD 1 OFFSET1 = -6.071 / average offset of CCD 1 GAIN2 = 3.6100 / average gain of CCD 2 OFFSET2 = -3.302 / average offset of CCD 2 GAIN3 = 3.8984 / average gain of CCD 3 OFFSET3 = -10.125 / average offset of CCD 3 GAIN4 = 3.8210 / average gain of CCD 4 OFFSET4 = 3.139 / average offset of CCD 4 GAIN5 = 4.4511 / average gain of CCD 5 OFFSET5 = 144.315 / average offset of CCD 5 GAIN6 = 3.7756 / average gain of CCD 6 OFFSET6 = 0.282 / average offset of CCD 6 GAIN7 = 4.5548 / average gain of CCD 7 OFFSET7 = 99.349 / average offset of CCD 7 GAIN8 = 4.3253 / average gain of CCD 8 OFFSET8 = 2.614 / average offset of CCD 8 GAIN9 = 4.1325 / average gain of CCD 9 OFFSET9 = -0.512 / average offset of CCD 9 HISTORY Created Thu 09:18:34 17-Apr-97 CCDNAME0= 'w203c4r ' / name of CCD 0 CCDNAME1= 'w193c2 ' / name of CCD 1 CCDNAME2= 'w158c4r ' / name of CCD 2 CCDNAME3= 'w215c2r ' / name of CCD 3 CCDNAME4= 'w168c4r ' / name of CCD 4 CCDNAME5= 'w140c4r ' / name of CCD 5 CCDNAME6= 'w182c4r ' / name of CCD 6 CCDNAME7= 'w134c4r ' / name of CCD 7 CCDNAME8= 'w457c4 ' / name of CCD 8 CCDNAME9= 'w201c3r ' / name of CCD 9 END ccd_id ccdnode gain offset none none eV/ADU eV 1 0 0 3.813900E0 -6.102000E0 2 0 1 3.903200E0 -5.074000E0 3 0 2 3.775000E0 -5.662000E0 4 0 3 3.892600E0 -7.396000E0 5 1 0 3.828500E0 -7.657000E0 6 1 1 3.921600E0 -3.921000E0 7 1 2 3.862500E0 -6.180000E0 8 1 3 3.838800E0 -6.526000E0 9 2 0 3.673800E0 -5.878000E0 10 2 1 3.546100E0 2.128000E0 11 2 2 3.558700E0 -2.135000E0 12 2 3 3.661700E0 -7.323000E0 13 3 0 3.886500E0 -1.010500E1 14 3 1 3.877500E0 -9.306000E0 15 3 2 3.946300E0 -7.498000E0 16 3 3 3.883500E0 -1.359200E1 17 4 0 3.695500E0 2.956000E0 18 4 1 3.757900E0 4.509000E0 19 4 2 3.909300E0 2.345000E0 20 4 3 3.921600E0 2.745000E0 21 5 0 4.275300E0 1.274050E2 22 5 1 4.621100E0 1.612750E2 23 5 2 4.514600E0 1.444690E2 24 5 3 4.393600E0 1.441120E2 25 6 0 3.859500E0 -3.860000E-1 26 6 1 3.700900E0 -7.400000E-1 27 6 2 3.805200E0 7.610000E-1 28 6 3 3.736900E0 1.494000E0 29 7 0 4.462300E0 9.147700E1 30 7 1 4.683800E0 9.695500E1 31 7 2 4.621000E0 1.016630E2 32 7 3 4.452300E0 1.073020E2 33 8 0 4.317800E0 3.022000E0 34 8 1 4.418900E0 2.651000E0 35 8 2 4.363000E0 4.363000E0 36 8 3 4.201700E0 4.200000E-1 37 9 0 3.973000E0 -7.940000E-1 38 9 1 3.910800E0 -3.910000E-1 39 9 2 3.872900E0 -3.870000E-1 40 9 3 4.773300E0 -4.770000E-1