PRIME Observation Log 2025/09/12

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Raw Log (Time is in SA time)
Ramp Log (Time is in UT)
CCMain Error Log (Time is in SA time)
Observation Log (Time is in UT)

Date: 2025/09/12
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 116.00005 +- 0.00073 K
ImageAcquisitionErrors occurred 1 times @
2025-09-13 02:18:29 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:49:03
Morning 06:16:03
Science Observation
(Sun altitude < -10°)
Start 19:10:23
End 05:54:45
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:10:23
End 00:40:36


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 08:04:43 10:44:21 0.752
GB Time 03:16:05 05:30:13 0.594
Non-GB Time 04:48:37 05:14:08 0.919


Institute Statistics
- ALLSKY time is equally distributed to each institute
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 1672 01:19:41 03:16:05 0.406
CALIB 236 00:11:14 00:27:17 0.412
SAAO 633 00:30:10 01:12:09 0.418
OU 633 00:30:10 01:12:09 0.418
NASA 633 00:30:10 01:12:09 0.418
ABC 633 00:30:10 01:12:09 0.418


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
SKY 72 00:03:25 00:09:54 0.347
Bulge 1600 01:16:16 03:06:11 0.410
all_sky_grid 2532 02:00:41 04:48:37 0.418
TWILIGHT 236 00:11:14 00:27:17 0.412


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GCsky_test 24 00:01:08 00:02:55 0.391
GCsky 48 00:02:17 00:06:58 0.328
GB76_test OH 16 00:00:45 00:05:20 0.143
GB76_dither OH 96 00:04:34 00:09:22 0.488
GB77_dither OH 96 00:04:34 00:09:24 0.486
GB78_dither OH 96 00:04:34 00:09:19 0.491
GB94_dither OH 96 00:04:34 00:09:13 0.496
GB111_dither OH 96 00:04:34 00:09:22 0.488
GB110_dither OH 96 00:04:34 00:09:25 0.486
GB109_dither OH 48 00:02:17 00:04:41 0.488
GB108_dither OH 24 00:01:08 00:02:19 0.493
GB91_dither OH 24 00:01:08 00:02:19 0.493
GB74_dither OH 24 00:01:08 00:02:21 0.484
GB92_dither OH 24 00:01:08 00:02:21 0.484
GB93_dither OH 24 00:01:08 00:02:21 0.484
GB75_dither OH 48 00:02:17 00:04:41 0.488
GB112_dither OH 48 00:02:17 00:04:41 0.488
GB79_dither OH 48 00:02:17 00:12:00 0.191
GB60_dither OH 24 00:01:08 00:02:21 0.484
GB95_dither OH 24 00:01:08 00:02:21 0.484
GB113_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 24 00:01:08 00:02:19 0.493
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB96_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:21 0.484
GB76_dither OJ 96 00:04:34 00:17:07 0.267
GB77_dither OJ 48 00:02:17 00:04:40 0.490
GB78_dither OJ 48 00:02:17 00:05:04 0.451
GB94_dither OJ 48 00:02:17 00:04:57 0.461
GB111_dither OJ 48 00:02:17 00:04:55 0.465
GB110_dither OJ 48 00:02:17 00:04:43 0.484
GB109_dither OJ 48 00:02:17 00:05:06 0.448
GB92_dither OJ 48 00:02:17 00:04:43 0.484
GB93_dither OJ 48 00:02:17 00:05:25 0.421
GB75_dither OJ 48 00:02:17 00:13:42 0.167
field3539_test 4 00:00:11 00:03:36 0.053
field7624_test 4 00:00:11 00:00:41 0.276
field9880_test 16 00:00:45 00:13:39 0.056
field9880 40 00:01:54 00:04:07 0.463
field9881 40 00:01:54 00:04:24 0.433
field9882 40 00:01:54 00:04:06 0.464
field9883 40 00:01:54 00:03:52 0.491
field9884 40 00:01:54 00:04:06 0.463
field9885 40 00:01:54 00:03:50 0.497
field9886 40 00:01:54 00:04:09 0.458
field9887 40 00:01:54 00:04:03 0.469
field9888 40 00:01:54 00:04:06 0.463
field9889 40 00:01:54 00:04:20 0.438
field9890 40 00:01:54 00:04:40 0.407
field9891 40 00:01:54 00:04:23 0.435
field9892 40 00:01:54 00:03:52 0.491
field9893 68 00:03:14 00:09:12 0.352
field9894 40 00:01:54 00:04:23 0.434
field9895 40 00:01:54 00:04:51 0.392
field9896 40 00:01:54 00:04:12 0.453
field9897 40 00:01:54 00:04:26 0.429
field9898 40 00:01:54 00:04:18 0.443
field9899 40 00:01:54 00:04:21 0.438
field9900 40 00:01:54 00:04:20 0.439
field9901 40 00:01:54 00:04:40 0.407
field9902 40 00:01:54 00:04:34 0.417
field9903 40 00:01:54 00:03:50 0.497
field9904 40 00:01:54 00:05:36 0.340
field9906 40 00:01:54 00:04:06 0.463
field9907 40 00:01:54 00:03:55 0.485
field9908 40 00:01:54 00:04:18 0.443
field9909 40 00:01:54 00:03:55 0.486
field9910 40 00:01:54 00:04:32 0.420
field9912 40 00:01:54 00:03:52 0.491
field9913 40 00:01:54 00:03:58 0.480
field9915 40 00:01:54 00:04:23 0.434
field9916 40 00:01:54 00:03:52 0.491
field9917 40 00:01:54 00:04:15 0.448
field9918 40 00:01:54 00:04:15 0.447
field9920 40 00:01:54 00:04:37 0.413
field9921 40 00:01:54 00:04:26 0.429
field9922 40 00:01:54 00:03:55 0.485
field9923 40 00:01:54 00:03:58 0.480
field9924 40 00:01:54 00:04:10 0.458
field9925 40 00:01:54 00:04:23 0.434
field9926 40 00:01:54 00:04:34 0.416
field9927 40 00:01:54 00:04:51 0.393
field9935 40 00:01:54 00:04:37 0.412
field9936 40 00:01:54 00:04:09 0.458
field9937 40 00:01:54 00:04:18 0.443
field9938 40 00:01:54 00:03:55 0.485
field9939 40 00:01:54 00:04:23 0.434
field9940 40 00:01:54 00:04:09 0.458
field9941 40 00:01:54 00:04:10 0.457
field9942 40 00:01:54 00:04:54 0.389
field9943 40 00:01:54 00:04:06 0.463
field9944 40 00:01:54 00:03:52 0.491
field9945 40 00:01:54 00:04:06 0.463
field9946 40 00:01:54 00:04:06 0.463
field9947 40 00:01:54 00:03:50 0.497
field9948 40 00:01:54 00:04:09 0.458
field9949 40 00:01:54 00:04:23 0.434
field9950 40 00:01:54 00:03:52 0.491
field9951 40 00:01:54 00:04:09 0.458
field10245 40 00:01:54 00:06:01 0.316
FLAT_test OY 8 00:00:22 00:03:36 0.106
FLAT OY 228 00:10:52 00:23:40 0.459










Stats so far in 2025
Monthly observed fraction so far in 2025
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 103:35:29 259:42:08 0.399
Feb 53:54:42 259:20:18 0.208
Mar 158:57:47 319:07:20 0.498
Apr 161:02:39 338:08:53 0.476
May 244:24:55 372:31:50 0.656
Jun 209:59:39 370:50:11 0.566
Jul 224:49:02 377:25:14 0.596
Aug 230:19:15 357:22:01 0.644
Sep 90:37:07 130:57:23 0.692

Observed time so far in 2025
- Total time of each institute is calculated by the following
    [All observation time in 2025] = [Observed time so far] + [Remaining time in the future]
    [Remaining time in the future] = [Clear sky fraction] x [Remaining night time (Sun alt. < -10°)]
    
    [GB observation time in 2025] = [Observed GB time so far] + [Remaining GB time in the future]
    [Remaining GB time in the future] = [Clear sky fraction] x [Remaining GB night time (Sun alt. < -10° & GB alt. > 22°)]
    
    [Non-GB observation time in 2025] = [All observation time in 2025] - [GB observation time in 2025]
    
    [OU, NASA, ABC time in 2025] = 0.24 x [Non-GB observation time in 2025]
    [SAAO time in 2025] = 0.28 x [Non-GB observation time in 2025]
    
- ALLSKY time is equally distributed to each institute
- ToO time is distributed to each institute based on input of observer of each date
- Clear sky fraction of (0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5) is assumed for (Jan, ..., Dec) in the calculation of the remaining observation time
All
(hh:mm:ss) 		GB
(hh:mm:ss) 		Non-GB
(hh:mm:ss) 		SAAO
(hh:mm:ss) 		OU
(hh:mm:ss) 		NASA
(hh:mm:ss) 		ABC
(hh:mm:ss) 		CALIB
(hh:mm:ss)
Total 1973:39:33 1025:49:32 947:50:00 265:23:36 227:28:48 227:28:48 227:28:48 184:19:04
Observed 1477:28:16
(74.86%)		 930:26:30
(90.70%)		 547:01:46
(57.71%)		 129:43:03
(48.88%)		 121:51:17
(53.57%)		 208:57:19
(91.86%)		 86:30:06
(38.03%)		 184:19:04
(N/A)
Remaining 496:11:17
(25.14%)		 95:23:02
(9.30%)		 400:48:14
(42.29%)		 135:40:32
(51.12%)		 105:37:31
(46.43%)		 18:31:28
(8.14%)		 140:58:42
(61.97%)		 00:00:00
(N/A)











Camera status (2025/09/12)



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