STScI Logo

Hubble Space Telescope
UV Monitoring Memo - OLD

Note:

This is the "oldest" version of this memo, when the photometric monitoring was performed with large apertures.

This memo contains photometric information for Proposal 5629 which takes exposures of the standard star GRW+70D5824 in filter F170W in all four WFPC2 CCD's once a week. The dates covered in this memo run from 25 Apr. 1994 through 18 Jul. 1995.

The images were calibrated using the WFPC2 pipeline. Aperture photometry was done using a radius of 30 pixels for both PC1 and the WF CCDs. The first table contains countrates normalized to the 25 Apr. 1994 countrate. The data on this date was taken 1 day after a decontamination which cooled the CCDs from -76° C to -88° C. The second column is the associated error. The second table contains the measured countrates per second with error.

Decontaminations were done on the following dates:

24 Apr. 1994   23 May  1994   13 Jun. 1994   10 Jul. 1994
28 Jul. 1994   27 Aug. 1994   24 Sep. 1994   20 Oct. 1994
19 Nov. 1994   17 Dec. 1994   12 Jan. 1995   11 Feb. 1995
11 Mar. 1995   07 Apr. 1995   06 May  1995   03 Jun. 1995
27 Jun. 1995

-Christine Ritchie

Normalized countrates to 25 Apr. 1994, followed by error.

   PC1            WF2            WF3           WF4            Date         MJD

1.0000 0.0052  1.0000 0.0061  1.0000 0.0066  1.0000 0.0073  25-Apr-1994  49467.06
0.9428 0.0070  0.9036 0.0084  0.8839 0.0086  0.9061 0.0100   6-May-1994  49478.38
0.9020 0.0069  0.8341 0.0078  0.8387 0.0083  0.8863 0.0097  12-May-1994  49484.27
0.8686 0.0067  0.7805 0.0076  0.7705 0.0081  0.8325 0.0095  18-May-1994  49490.23
0.8379 0.0066  0.7171 0.0072  0.7311 0.0078  0.7770 0.0093  23-May-1994  49495.12
0.9273 0.0071  0.8929 0.0082  0.8646 0.0084  0.9145 0.0101   3-Jun-1994  49506.84
0.9436 0.0071  0.8798 0.0080  0.8504 0.0084  0.9028 0.0098   6-Jun-1994  49509.18
1.0139 0.0072  1.0046 0.0083  0.9674 0.0090  1.0046 0.0095  15-Jun-1994  49518.08
0.9763 0.0070  0.9204 0.0079  0.9012 0.0084  0.9247 0.0089  24-Jun-1994  49527.80
0.9053 0.0067  0.8426 0.0075  0.8143 0.0079  0.8638 0.0086   3-Jul-1994  49536.36
1.0046 0.0071  1.0242 0.0086  0.9827 0.0088  1.0074 0.0095  12-Jul-1994  49545.00
1.0083 0.0072  0.9763 0.0081  0.9204 0.0086  0.9541 0.0092  16-Jul-1994  49549.09
0.9471 0.0069  0.9020 0.0081  0.8646 0.0088  0.8823 0.0089  23-Jul-1994  49556.79
0.9638 0.0069  0.8614 0.0079  0.8504 0.0082  0.8831 0.0089  25-Jul-1994  49558.06
0.9863 0.0070  0.9367 0.0081  0.9307 0.0088  0.9471 0.0093   3-Aug-1994  49567.91
0.9384 0.0068  0.9120 0.0078  0.8888 0.0087  0.9367 0.0091   8-Aug-1994  49572.05
0.9462 0.0069  0.8464 0.0077  0.8211 0.0082  0.8646 0.0087  15-Aug-1994  49579.07
0.8457 0.0064  0.7338 0.0071  0.7112 0.0075  0.7593 0.0078  26-Aug-1994  49590.39
1.0328 0.0073  0.9881 0.0082  0.9710 0.0091  1.0177 0.0095  29-Aug-1994  49593.27
0.9436 0.0068  0.8622 0.0077  0.8264 0.0083  0.8566 0.0087  11-Sep-1994  49606.67
0.9324 0.0068  0.8098 0.0074  0.7980 0.0079  0.8559 0.0085  14-Sep-1994  49609.41
0.9095 0.0066  0.7677 0.0072  0.7489 0.0075  0.8061 0.0081  19-Sep-1994  49614.04
1.0394 0.0073  1.0000 0.0086  0.9550 0.0093  0.9817 0.0096  26-Sep-1994  49621.47
0.9683 0.0070  0.9020 0.0079  0.8798 0.0086  0.9213 0.0090   5-Oct-1994  49630.11
0.9445 0.0069  0.8488 0.0076  0.7907 0.0079  0.8806 0.0088  11-Oct-1994  49636.05
0.9171 0.0068  0.7762 0.0072  0.7614 0.0080  0.8098 0.0084  17-Oct-1994  49642.09
1.0224 0.0072  0.9890 0.0083  0.9358 0.0087  0.9719 0.0093  25-Oct-1994  49650.25
1.0065 0.0072  0.8855 0.0078  0.8702 0.0085  0.9264 0.0093   2-Nov-1994  49658.62
0.9603 0.0068  0.8566 0.0076  0.8069 0.0081  0.8726 0.0085   7-Nov-1994  49663.25
0.9137 0.0068  0.7614 0.0071  0.7178 0.0077  0.8039 0.0082  14-Nov-1994  49670.88
1.0242 0.0072  0.9890 0.0085  0.9772 0.0092  0.9781 0.0093  22-Nov-1994  49678.09
0.9827 0.0070  0.9298 0.0078  0.8750 0.0084  0.9179 0.0089  28-Nov-1994  49684.48
0.9419 0.0068  0.8295 0.0076  0.7936 0.0082  0.8686 0.0089   6-Dec-1994  49692.69
0.8750 0.0066  0.7900 0.0074  0.7338 0.0080  0.7863 0.0085  14-Dec-1994  49700.73
1.0261 0.0072  1.0093 0.0084  0.9497 0.0090  0.9710 0.0093  19-Dec-1994  49705.96
0.9772 0.0069  0.9612 0.0085  0.9045 0.0090  0.9307 0.0092  26-Dec-1994  49712.45
0.9045 0.0066  0.8032 0.0073  0.7713 0.0080  0.7987 0.0082   7-Jan-1995  49724.50
0.8888 0.0066  0.7621 0.0071  0.7015 0.0072  0.7762 0.0081  11-Jan-1995  49728.79
1.0148 0.0072  0.9471 0.0080  0.8823 0.0085  0.9196 0.0091  21-Jan-1995  49738.95
0.9621 0.0069  0.8718 0.0075  0.8272 0.0082  0.9003 0.0089  27-Jan-1995  49744.91
0.9489 0.0068  0.8480 0.0074  0.8076 0.0081  0.8662 0.0087  30-Jan-1995  49747.85
0.8750 0.0065  0.7413 0.0071  0.7086 0.0080  0.7856 0.0083  10-Feb-1995  49758.44
1.0328 0.0072  1.0065 0.0084  0.9568 0.0088  0.9845 0.0093  14-Feb-1995  49762.05
1.0046 0.0071  0.9264 0.0078  0.8823 0.0086  0.9179 0.0090  20-Feb-1995  49768.82
0.9204 0.0067  0.8758 0.0077  0.7995 0.0083  0.8646 0.0088   4-Mar-1995  49780.27
0.8954 0.0066  0.7684 0.0070  0.7777 0.0080  0.7995 0.0083   7-Mar-1995  49783.50
0.9936 0.0071  -.---- -.----  0.9028 0.0091  0.9333 0.0092  19-Mar-1995  49795.73
1.0018 0.0071  0.8888 0.0075  0.8742 0.0086  0.9154 0.0091  23-Mar-1995  49799.07
0.9745 0.0070  0.8782 0.0079  0.8590 0.0089  0.8654 0.0088  27-Mar-1995  49803.50
0.9087 0.0067  0.7509 0.0071  0.7271 0.0077  0.7958 0.0083   6-Apr-1995  49813.93
1.0309 0.0072  0.9719 0.0081  0.9612 0.0091  0.9585 0.0092  12-Apr-1995  49819.69
-.---- -.----  0.8774 0.0075  -.---- -.----  -.---- -.----  22-Apr-1995  49829.84
0.9559 0.0068  0.8622 0.0078  0.8418 0.0084  0.8670 0.0086  24-Apr-1995  49831.68
0.9078 0.0065  0.7352 0.0070  0.7238 0.0078  0.7856 0.0083   5-May-1995  49842.13
1.0233 0.0072  0.9638 0.0080  0.9428 0.0088  0.9754 0.0094  11-May-1995  49848.66
1.0083 0.0071  0.9204 0.0083  -.---- -.----  0.9324 0.0092  15-May-1995  49852.57
0.9638 0.0069  0.8511 0.0074  0.8257 0.0082  0.8654 0.0087  22-May-1995  49859.65
0.9436 0.0069  0.7936 0.0072  0.7642 0.0079  0.8211 0.0085  31-May-1995  49868.64
0.9982 0.0070  0.9524 0.0083  0.9341 0.0092  0.9350 0.0092  11-Jun-1995  49879.95
0.9954 0.0070  0.8726 0.0078  0.8333 0.0084  0.8921 0.0087  17-Jun-1995  49885.17
0.9656 0.0070  0.8418 0.0074  0.8054 0.0084  0.8654 0.0090  20-Jun-1995  49888.99
0.9358 0.0069  0.7958 0.0072  0.7635 0.0081  0.8128 0.0085  26-Jun-1995  49894.07
1.0158 0.0072  0.9683 0.0083  0.9358 0.0089  0.9367 0.0093   3-Jul-1995  49901.04
0.9845 0.0071  0.8449 0.0074  0.8287 0.0084  0.8742 0.0088  14-Jul-1995  49912.95

Counts per second followed by error.

 
    PC1            WF2            WF3          WF4            Date         MJD

160.546 0.834  219.786 1.332  191.955 1.268  198.976 1.452  25-Apr-1994  49467.06
151.356 0.814  198.609 1.387  169.668 1.213  180.302 1.495   6-May-1994  49478.38
144.810 0.820  183.316 1.293  160.990 1.178  176.360 1.442  12-May-1994  49484.27
139.444 0.805  171.554 1.308  147.911 1.210  165.653 1.447  18-May-1994  49490.23
134.524 0.803  157.616 1.259  140.346 1.166  154.597 1.455  23-May-1994  49495.12
148.868 0.829  196.246 1.345  165.959 1.178  181.970 1.502   3-Jun-1994  49506.84
151.496 0.824  193.375 1.314  163.230 1.205  179.639 1.453   6-Jun-1994  49509.17
162.780 0.792  220.800 1.223  185.695 1.213  199.894 1.217  15-Jun-1994  49518.08
156.747 0.777  202.302 1.215  172.982 1.136  183.992 1.155  24-Jun-1994  49527.80
145.345 0.755  185.183 1.222  156.315 1.117  171.870 1.174   3-Jul-1994  49536.36
161.287 0.771  225.113 1.298  188.625 1.151  200.447 1.207  12-Jul-1994  49545.00
161.882 0.789  214.585 1.222  176.685 1.154  189.845 1.198  16-Jul-1994  49549.09
152.055 0.776  198.244 1.299  165.959 1.284  175.550 1.216  23-Jul-1994  49556.79
154.739 0.768  189.321 1.304  163.230 1.148  175.711 1.226  25-Jul-1994  49558.06
158.343 0.756  205.873 1.279  178.649 1.197  188.452 1.233   3-Aug-1994  49567.91
150.661 0.760  200.447 1.206  170.608 1.231  186.380 1.190   8-Aug-1994  49572.05
151.915 0.769  186.037 1.269  157.616 1.184  172.028 1.180  15-Aug-1994  49579.07
135.769 0.746  161.287 1.202  136.521 1.127  151.078 1.087  26-Aug-1994  49590.39
165.806 0.791  217.170 1.243  186.380 1.244  202.488 1.193  29-Aug-1994  49593.27
151.496 0.768  189.496 1.236  158.635 1.199  170.451 1.215  11-Sep-1994  49606.67
149.692 0.768  177.992 1.230  153.179 1.123  170.294 1.158  14-Sep-1994  49609.41
146.016 0.746  168.733 1.205  143.747 1.071  160.398 1.101  19-Sep-1994  49614.04
166.878 0.796  219.786 1.326  183.316 1.299  195.344 1.263  26-Sep-1994  49621.47
155.453 0.771  198.244 1.254  168.888 1.226  183.316 1.176   5-Oct-1994  49630.11
151.635 0.769  186.552 1.239  151.775 1.128  175.227 1.188  11-Oct-1994  49636.05
147.231 0.783  170.608 1.203  146.150 1.183  161.139 1.187  17-Oct-1994  49642.09
164.135 0.788  217.370 1.274  179.639 1.182  193.375 1.206  25-Oct-1994  49650.25
161.585 0.791  194.626 1.248  167.032 1.205  184.332 1.269   2-Nov-1994  49658.62
154.170 0.750  188.278 1.229  154.882 1.173  173.620 1.126   7-Nov-1994  49663.25
146.690 0.773  167.340 1.190  137.784 1.155  159.956 1.137  14-Nov-1994  49670.88
164.437 0.784  217.370 1.330  187.586 1.247  194.626 1.197  22-Nov-1994  49678.09
157.761 0.758  204.362 1.190  167.958 1.174  182.642 1.164  28-Nov-1994  49684.48
151.217 0.764  182.306 1.247  152.335 1.217  172.822 1.237   6-Dec-1994  49692.69
140.475 0.758  173.620 1.227  140.864 1.231  156.459 1.242  14-Dec-1994  49700.73
164.740 0.771  221.820 1.263  182.306 1.250  193.197 1.209  19-Dec-1994  49705.96
156.892 0.758  211.252 1.369  173.620 1.287  185.183 1.249  26-Dec-1994  49712.45
145.211 0.745  176.523 1.206  148.047 1.181  158.928 1.152   7-Jan-1995  49724.50
142.692 0.763  167.494 1.189  134.648 1.057  154.454 1.160  11-Jan-1995  49728.79
162.930 0.797  208.161 1.234  169.356 1.177  182.978 1.215  21-Jan-1995  49738.94
154.454 0.764  191.602 1.176  158.781 1.185  179.143 1.197  27-Jan-1995  49744.91
152.335 0.762  186.380 1.180  155.024 1.176  172.345 1.202  30-Jan-1995  49747.85
140.475 0.738  162.930 1.198  136.019 1.238  156.315 1.183  10-Feb-1995  49758.44
165.806 0.779  221.208 1.265  183.654 1.181  195.885 1.174  14-Feb-1995  49762.05
161.287 0.769  203.610 1.178  169.356 1.217  182.642 1.199  20-Feb-1995  49768.82
147.775 0.759  192.486 1.223  153.462 1.217  172.028 1.223   4-Mar-1995  49780.27
143.747 0.748  168.888 1.153  149.279 1.169  159.074 1.186   7-Mar-1995  49783.50
159.514 0.774  ---.--- -.---  173.301 1.317  185.695 1.243  19-Mar-1995  49795.73
160.842 0.781  195.344 1.157  167.803 1.211  182.138 1.239  23-Mar-1995  49799.07
156.459 0.769  193.019 1.293  164.892 1.314  172.187 1.225  27-Mar-1995  49803.50
145.881 0.754  165.044 1.184  139.572 1.160  158.343 1.185   6-Apr-1995  49813.93
165.501 0.766  213.599 1.209  184.501 1.246  190.722 1.204  12-Apr-1995  49819.69
---.--- -.---  192.841 1.168  ---.--- -.---  ---.--- -.---  22-Apr-1995  49829.84
153.462 0.734  189.496 1.261  161.585 1.221  172.504 1.162  24-Apr-1995  49831.68
145.747 0.727  161.585 1.173  138.931 1.193  156.315 1.186   5-May-1995  49842.12
164.286 0.776  211.836 1.212  180.967 1.201  194.089 1.228  11-May-1995  49848.66
161.883 0.772  202.302 1.342  ---.--- -.---  185.524 1.233  15-May-1995  49852.57
154.739 0.757  187.068 1.163  158.489 1.164  172.187 1.185  22-May-1995  49859.65
151.496 0.774  174.422 1.169  146.690 1.169  163.380 1.206  31-May-1995  49868.64
160.251 0.764  209.315 1.323  179.308 1.318  186.037 1.225  11-Jun-1995  49879.95
159.809 0.764  191.779 1.247  159.956 1.225  177.501 1.157  17-Jun-1995  49885.17
155.024 0.779  185.012 1.166  154.597 1.253  172.187 1.269  20-Jun-1995  49888.99
150.245 0.779  174.904 1.188  146.555 1.217  161.733 1.198  26-Jun-1995  49894.08
163.080 0.782  212.814 1.302  179.639 1.235  186.380 1.261   3-Jul-1995  49901.04
158.052 0.782  185.695 1.166  159.074 1.223  173.940 1.216  14-Jul-1995  49912.95