Status Report Photometric Calibration VIRMOS survey - June 9, 2001.
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Summary Photometric Standard Stars of the VIRMOS CFH12K Survey
cste/1s -> constant for one second
cste/1s/corrected -> constant for one second , corrected from atmospheric extinction
fact -> depends on color and pointing: cste/1s/corrected = cste/1s + fact*airmass
If colour equation reported then: zeromag point = cste + slope*index
sigma -> dispersion on the measurement of cste, with : zeromag point = cste + slope*index
Sextractor coef: zeropoint/1s/corrected + 2.5log(exp.time in sec) - airmass*fact
where, for CFHT: fact=0.08 in I, 0.10 in R, 0.12 in V, 0.20 in B.
----> NOTE :: MAGNITUDE ARE IN VEGA MAG. SYSTEM --------
date stand band cste/1s fact airmass cste/1s/corrected slope index sigma comments
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May 99 SA110 I 25.716 0.08 1.0715 25.802 0. --- 0.0630 average without 311,L1
25.647 0.08 1.0715 25.733 0.0428 V-I 0.0290 color eq. without 311,L1
25.728 0.08 1.0715 25.814 0. --- 0.0700 average without 311
25.641 0.08 1.0715 25.727 0.0519 V-I 0.0174 color eq. without 311
May 99 SA110 V 26.108 0.12 1.0685 26.236 0. --- 0.0453 average without 312,266
26.088 0.12 1.0685 26.216 0.0141 B-V 0.0229 color eq. without 312,266
May 99 SA110 B 25.466 0.20 1.0689 25.680 0. --- 0.1000 average without L1,316
25.335 0.20 1.0689 25.549 0.0921 B-V 0.0230 color eq. without L1,316
25.412 0.20 1.0689 25.626 0. --- 0.0630 average without L1 et ccd10-11
25.382 0.20 1.0689 25.596 0.0246 B-V 0.0210 color eq. without L1 et ccd10-11
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Nov 99 SA101 I 25.804 0.08 1.1210 25.894 0. --- 0.0620 average without L4,L6,L2,L5
25.733 0.08 1.1210 25.823 0.0763 V-I 0.0143 color eq. without L4,L6,L2,L5
25.821 0.08 1.1210 25.911 0. --- 0.0730 average without L4,L6
25.784 0.08 1.1210 25.874 0.0411 V-I 0.0174 color eq. without L4,L6
Nov 99 SA101 R 26.286 0.10 1.131 26.399 0. --- 0.0295 average without image 508397
26.297 0.10 1.131 26.410 0. --- 0.0375 average
26.293 0.10 1.131 26.406 -0.0148 --- 0.0121 color eq. without image 508397
26.303 0.10 1.131 26.416 -0.0132 --- 0.0128 color eq. without image 508397
Nov 99 SA101 V 26.230 0.12 1.135 26.366 0. --- 0.0387 average
26.210 0.12 1.135 26.346 0.0211 V-I 0.0105 color eq.
Nov 99 SA101 B 26.082 0.20 1.138 26.310 0. --- 0.0492 moyenne
26.034 0.20 1.138 26.253 0.0708 B-V 0.0172 color eq.
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Apr00-1 SA101 I 26.3044 0. --- 0.0719 without L4
26.3272 -0.02597 V-I 0.0347 without L4
Apr00-1 SA110 I 26.3537 0. --- 0.0742 without 311,349
I 26.1397 0.13200 V-I 0.0415 without 311,349
Apr00-1 SA110+SA101 I 26.3260 0. --- 0.0761 without L4,311,349
SA110+SA101 I 26.2510 0.06250 V-I 0.0225 without L4,311,349
Apr00-1 B LOST done in ciurrus clouds
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Apr00-2 SA101 B 26.2917 0. --- 0.0561
26.2282 0.07785 B-V 0.0180
Apr00-2 SA110 B 26.2960 0. --- 0.0683 without 312,316,L1
B 26.3299 -0.00224 B-V 0.0207 without 312,316,L1
Apr00-2 SA110+SA101 B 26.2939 0. --- 0.0624 without 312,316,L1
B 26.2940 -0.00012 B-V 0.0109 without 312,316,L1
Apr00-2 SA110 V 26.3510 0. --- 0.0290 without L1
Apr00-2 SA110 I 26.3386 0. --- 0.0651 without 311,349
26.2493 0.05437 V-I 0.0413 without 311,349
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Sept+Oct00 SA92 I 26.2820 0. --- 0.0517
SA92 I 26.2906 0. --- 0.0393 Same as above without 259
SA92 I 26.2491 0.0373 V-I 0.0194
SA92 I 26.2629 0.0312 V-I 0.0147 Same as above without 259
Oct00-3 SA92 B 25.8892 0. --- 0.0412
Oct00-3 SA101 R 26.0298 0. --- 0.0094
Oct00-3 SA101 R 26.0090 0.0790 R-I 0.0928
Oct00-3 SA101 I 26.0078 0. --- 0.0239 Without L5
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