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Pre-NCS Photometric Keywords and Zeropoints

Pre-NCS Values for NICMOS Photometric Keywords and Zeropoints in the Vegamag System

Last update February 2007.

The three tables below show NICMOS Photometric Keywords derived from principle calibration stars P330E and G191B2B for the three different cameras. The calibration values are the weighted averages of the values derived for the two stars individually. The relative error (sigma/mean) reflects the uncertainty in PHOTFLAM and PHOTFNU due to the individual star measurement errors and the discrepancy between the two stars. This error does not include the uncertainty in the absolute calibration of the reference star spectra, which are believed to be less than 5%. This reference spectrum uncertainty will also introduce a much smaller error in colors derived from NICMOS observations in different passbands, which are thought to be less than 3%, especially for the broad and medium band filters. The calibrations have been measured using apertures with a 11.5 pixel radius for NIC1, a 6.5 pixel radius for NIC2 and a 5.5 pixel radius for NIC3. They were then corrected to total flux with the listed passband dependent aperture corrections derived from TinyTim simulations. The fractional error values listed below are fractions of 1.0 (multiply this value by 100 to get the error in percent).

CAMERA 1
FILTER PHOTFLAM PHOTFLAMERR PHOTPLAM PHOTBW PHOTZPT PHOTFNU PHOTFNUERR <F_NU(VEGA)> APCOR
erg*cm-2-1*DN-1 fractional error Å Å mag Jy*sec*DN-1 fractional error Jy
F090M 4.83128e-18 0.0116 9041.2 559.5 -21.10 1.31734e-05 0.0116 2265.6 1.1079
F095N 7.33517e-17 0.0316 9536.8 37.6 -21.10 2.22534e-04 0.0316 2046.3 1.1129
F097N 5.84076e-17 0.0133 9715.8 44.1 -21.10 1.83912e-04 0.0133 2275.3 1.1149
F108N 3.97060e-17 0.0056 10816.3 38.5 -21.10 1.54951e-04 0.0056 1937.0 1.1194
F110M 1.75220e-18 0.0044 11025.8 590.3 -21.10 7.10533e-06 0.0044 1882.5 1.1250
F110W 5.45196e-19 0.0152 11292.4 1653.7 -21.10 2.31904e-06 0.0152 1844.0 1.1285
F113N 2.95032e-17 0.0025 11298.4 47.1 -21.10 1.25626e-04 0.0025 1820.9 1.1273
F140W 2.02485e-19 0.0209 14398.8 2374.9 -21.10 1.40031e-06 0.0209 1353.7 1.1490
F145M 7.97740e-19 0.0174 14556.7 587.8 -21.10 5.63854e-06 0.0174 1246.0 1.1577
F160W 2.88310e-19 0.0033 16071.3 1169.8 -21.10 2.48394e-06 0.0033 1082.6 1.1614
F164N 6.12803e-18 0.0035 16460.4 60.2 -21.10 5.53834e-05 0.0035 1003.1 1.1616
F165M 5.50858e-19 0.0086 16489.2 592.9 -21.10 4.99598e-06 0.0086 1026.0 1.1624
F166N 6.06348e-18 0.0074 16606.8 61.8 -21.10 5.57789e-05 0.0074 1047.6 1.1619
F170M 4.74737e-19 0.0067 17067.2 598.9 -21.10 4.61270e-06 0.0067 981.1 1.1642
F187N 4.33361e-18 0.0045 18747.8 67.1 -21.10 5.08077e-05 0.0045 803.8 1.1744
F190N 4.11027e-18 0.0150 18986.0 72.0 -21.10 4.94218e-05 0.0150 836.4 1.1766
POL0S 1.86575e-18 * 10602.4 1317.2 -21.10 6.99590e-06 * 2028.0 *
POL120S 1.84349e-18 * 10602.4 1317.2 -21.10 6.91243e-06 * 2028.0 *
POL240S 1.84399e-18 * 10602.4 1317.2 -21.10 6.91431e-06 * 2028.0 *
CAMERA 2
FILTER PHOTFLAM PHOTFLAMERR PHOTPLAM PHOTBW PHOTZPT PHOTFNU PHOTFNUERR <F_NU(VEGA)> APCOR
erg*cm-2-1*DN-1 fractional error Å Å mag Jy*sec*DN-1 fractional error Jy
F110W 4.34878e-19 0.0012 11284.7 1632.4 -21.10 1.84724e-06 0.0012 1847.6 1.1487
F160W 2.36501e-19 0.0070 16059.9 1177.3 -21.10 2.03470e-06 0.0070 1083.9 1.1877
F165M 4.49436e-19 0.0007 16516.2 592.3 -21.10 4.08945e-06 0.0007 1023.3 1.1895
F171M 1.05375e-18 0.0080 17212.4 248.1 -21.10 1.04136e-05 0.0080 966.1 1.1914
F180M 9.99286e-19 0.0022 17971.1 239.3 -21.10 1.07651e-05 0.0022 903.9 1.1955
F187N 3.59506e-18 0.0094 18739.9 67.5 -21.10 4.21134e-05 0.0094 805.3 1.2018
F187W 3.17905e-19 0.0019 18717.7 724.6 -21.10 3.71520e-06 0.0019 847.8 1.2022
F190N 3.47625e-18 0.0069 19003.5 62.6 -21.10 4.18751e-05 0.0069 835.6 1.2045
F204M 5.53064e-19 0.0071 20354.6 339.2 -21.10 7.64331e-06 0.0071 744.2 1.2160
F205W 8.52433e-20 0.0094 20714.4 1832.1 -21.10 1.22007e-06 0.0094 731.2 1.2129
F207M 3.77493e-19 0.0065 20824.1 454.1 -21.10 5.46037e-06 0.0065 713.8 1.2184
F212N 2.40017e-18 0.0079 21213.0 87.8 -21.10 3.60266e-05 0.0079 691.0 1.2202
F215N 2.52055e-18 0.0018 21487.3 79.2 -21.10 3.88185e-05 0.0018 670.5 1.2211
F216N 2.30965e-18 0.0080 21641.1 79.3 -21.10 3.60813e-05 0.0080 631.1 1.2215
F222M 3.17054e-19 0.0014 22181.7 511.9 -21.10 5.20358e-06 0.0014 634.9 1.2224
F237M 1.18170e-19 0.0067 23696.2 473.1 -21.10 2.21332e-06 0.0067 570.7 1.2247
POL0L 5.71139e-19 * 20007.4 632.7 -21.10 7.62609e-06 * 785.0 *
POL120L 5.63920e-19 * 20007.4 632.7 -21.10 7.52969e-06 * 785.0 *
POL240L 5.62965e-19 * 20007.4 632.6 -21.10 7.51694e-06 * 785.0 *
CAMERA 3
FILTER PHOTFLAM PHOTFLAMERR PHOTPLAM PHOTBW PHOTZPT PHOTFNU PHOTFNUERR <F_NU(VEGA)> APCOR
erg*cm-2-1*DN-1 fractional error Å Å mag Jy*sec*DN-1 fractional error Jy
F108N 4.22010e-17 0.0320 10799.5 47.4 -21.10 1.64176e-04 0.0320 1945.6 1.0550
F110W 5.97087e-19 0.0233 11263.8 1683.6 -21.10 2.52689e-06 0.0233 1850.8 1.0572
F113N 3.19002e-17 0.0331 11283.8 44.9 -21.10 1.35483e-04 0.0331 1824.9 1.0583
F150W 1.73402e-19 0.0173 15484.3 2345.1 -21.10 1.38681e-06 0.0173 1201.2 1.0769
F160W 3.13060e-19 0.0144 16077.6 1172.4 -21.10 2.69928e-06 0.0144 1082.0 1.0811
F164N 6.54957e-18 0.0122 16460.4 60.1 -21.10 5.91933e-05 0.0122 1003.1 1.0850
F166N 6.74435e-18 0.0066 16583.0 59.1 -21.10 6.18648e-05 0.0066 1048.9 1.0860
F175W 8.40761e-20 0.0142 18359.8 3229.5 -21.10 9.45335e-07 0.0142 943.8 1.0897
F187N 4.71418e-18 0.0059 18747.9 67.2 -21.10 5.52702e-05 0.0059 803.8 1.0950
F190N 4.29877e-18 0.0050 19003.5 62.7 -21.10 5.17834e-05 0.0050 835.6 1.0968
F196N 3.67951e-18 0.0162 19639.1 74.8 -21.10 4.73384e-05 0.0162 786.6 1.1014
F200N 3.45007e-18 0.0129 19975.0 83.9 -21.10 4.59176e-05 0.0129 768.4 1.1036
F212N 2.97044e-18 0.0109 21213.2 88.2 -21.10 4.45874e-05 0.0109 690.9 1.1092
F215N 3.13354e-18 0.0108 21487.4 79.3 -21.10 4.82596e-05 0.0108 670.6 1.1104
F222M 3.89609e-19 0.0149 22183.7 511.3 -21.10 6.39554e-06 0.0149 634.8 1.1140
F240M 2.18971e-19 0.0329 23969.0 587.6 -21.10 4.19628e-06 0.0329 559.5 1.1242
G096 1.36882e-18 * 10077.6 1211.8 -21.10 4.63706e-06 * 2139.0 *
G141 2.30314e-19 * 15527.2 2404.5 -21.10 1.85219e-06 * 1236.0 *
G206 7.90293e-20 * 20286.3 3318.7 -21.10 1.08485e-06 * 818.0 *