; ; ; ; copy this file to grismspec.dat in order to make NICMOSlook ; work for ACS grism. ; ; ; ; ; calibration files November 98: ; wavelength calibrations are average values of all 1998 calibration ; observations. For data taken Jan 98 or earlier, these values might ; not be accurate. ; flux calibration are average values of all flux calibrator observations. ; ; For details on the calibration, see http://ecf.hq.eso.org/nicmos/nic3_calib ; ; Image specification and dispersion database for NICMOSlook ; ; This file is read by NICMOSlook and specifies: ; - whether NICMOSlook treats an image as a direct image or a grism image ; - the in case of a grism image, what dispersion and distortion in used. ; - flatfield file to be used for flatfield extraction ; - PSF points speread function for file used for object searching ; - BCK default background file ; - RSP response curve for grism ; ; Each entry has to start with the keyword in the image header which is used ; to identify the image. Next, the value for this keyword and the ; corresponding image type (d= direct image, s= spectrum). ; ; The next entry should be the dispersion order this entry describes. ; ; If the image is a grism image, a number of additional parameters are ; given. First, the range of dispersion of the spectrum is given in pixels. ; The first number is the value (microns) for the shortest wavelengths, and ; the second number is the value (microns) for the longest wavelength. ; These values are used to determine the range of the extraction ; process. ; ; What follows is the dispersion relation, parametrized as ; ; lambda = a0 + a1*x + a2*x^2 + a3*x^3 ; ; where x is the x-position in pixels and lambda is the wavelength in micron. ; ; Finally, the image distortion (in y direction) is specified parametrized as ; ; delta_y = b0 + b1*r + b2*r^2 + b3*r^3 ; ; where r = sqrt(x^2 + y^2) is the radius position in pixels and ; delta_y is the y-deviation in pixels of the spectrum from a horizontal line. ; ; In addition, the angle th(eta) specifies a possible small global rotation ; of the spectrum relative to an exact alignment along a row. The ; angle is measured in the usual mathematical fashion, i.e. ; counterclockwise in units of degrees. ; ; The initial data file was created with parameters for the dispersion ; relations determined from a fit to the output of Rodger Thompson's program ; grismoutput and the distortions set to zero. ; ; column FF specifies the flatfield file (cube) to be used for extraction of ; the spectra, or a filelist (*.list) containing narrow band flatfields. ; ; MODIFICATION HISTORY ; $Date: 2000/03/31 15:08:12 $ ; ;keyword value disp dispersion relation distortion ; range lambda = sum(ai * x**i) delta = sum(bi * r**i) ; a0 a1 a2 a3 b0 b1 b2 b3 th SO FF PSF BCK RSP FILTER G096 s 0 0.7900000 1.210000 7.550000 -0.04000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.960000 -4.440000 flats_jan98.list F205.conv bckG096.fits G096_0.dummy prf.dat distort.dat weight_G096.fits FILTER G096 s 1 0.7900000 1.210000 0.9487000 -0.005369000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.960000 -4.440000 flats.coeff F205.conv bckG096.fits g096.response prf.dat distort.dat weight_G096.fits FILTER G096 s 2 0.8300000 1.050000 0.5206000 -0.002825000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.960000 -4.440000 flats_jan98.list F205.conv bckG096.fits g096_2.response prf.dat distort.dat weight_G096.fits FILTER G141 s 0 1.110000 1.890000 15.0 -0.0800000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -1.260000 -6.660000 flats_jan98.list F205.conv bckG141.fits G141_0.dummy prf.dat distort.dat weight_G141.fits FILTER G141 s 1 1.050000 1.950000 1.401000 -0.007992000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -0.8572140 -6.678565 flats_jan98.list F205.conv bckG141.fits g141.response prf.dat distort.dat weight_G141.fits FILTER G141 s 2 1.110000 1.890000 0.6900000 -0.004220000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -0.7400000 -6.660000 flats_jan98.list F205.conv bckG141.fits g141_2.response prf.dat distort.dat weight_G141.fits FILTER G206 s 0 1.450000 2.450000 200.039300 -0.01105000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -1.700000 -2.150000 flats_jan98.list F205.conv fbckg206.fits G206_0.dummy prf5.dat distort.dat weight_G206.fits FILTER G206 s 1 1.450000 2.500000 2.045000 -0.01152000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -1.700000 -2.150000 flats_jan98.list F205.conv fbckg206.fits g206.response prf4.dat distort.dat weight_G206.fits FILTER G206 s 2 1.450000 2.450000 1.139300 -0.005550000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -1.700000 -2.150000 flats_jan98.list F205.conv fbckg206.fits g206_2.response prf.dat distort.dat weight_G206.fits FILTER F108N d F108N.conv FILTER F110W d F110W.conv FILTER F113N d F113N.conv FILTER F150W d F150W.conv FILTER F160W d F160W.conv FILTER F164N d F164N.conv FILTER F165M d F165M.conv FILTER F166N d F166N.conv FILTER F175W d F175W.conv FILTER F187N d F187N.conv FILTER F190N d F190N.conv FILTER F196N d F196N.conv FILTER F200N d F200N.conv FILTER F205W d F205W.conv FILTER F212N d F212N.conv FILTER F215N d F215N.conv FILTER F222M d F222M.conv FILTER F240M d F237M.conv FILTER ACSG s 1 0.5000000 1.100000 0.5265000 0.004000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.07096843 0.1028456 flats.coeff F205.conv bckG096.fits ACSG.response prf.dat distort.dat weight_G141.fits FILTER ACSD d F205.conv FILTER gr800l s 0 0.5500000 1.050000 15.4883720 0.116270000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.002053 3.8589996 flats.coeff F205.conv bckG096.fits ACSG.response prf.dat distort.dat weight_G141.fits FILTER gr800l s 1 0.5500000 1.050000 0.5264200 0.003980000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.002050 3.859000 flats.coeff F205.conv bckG096.fits ACSG.response prf.dat distort.dat weight_G141.fits FILTER gr800l s 2 0.5500000 1.050000 0.2632100 0.001990000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 -2.002053 3.8589996 flats.coeff F205.conv bckG096.fits ACSG.response prf.dat distort.dat weight_G141.fits