PRIME Observation Log 2025/09/22

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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: 2025/09/22
Local observer:
Remote observer: Ryusei, Kansuke
Weather: clear
Comment:
Detector Temperature: 113.89808 +- 0.54274 K
ImageAcquisitionErrors occurred 2 times @
2025-09-22 23:26:51 SAT
2025-09-22 23:43:12 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:55:18
Morning 06:02:41
Science Observation
(Sun altitude < -10°)
Start 19:16:43
End 05:41:18
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:16:43
End 00:01:17


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 04:07:02 10:24:35 0.396
GB Time 00:00:00 04:44:34 0.000
Non-GB Time 04:07:02 05:40:01 0.727


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.)
SAAO 354 00:16:52 01:19:17 0.213
CALIB 252 00:12:00 00:31:49 0.377
OU 343 00:16:20 00:55:55 0.292
NASA 343 00:16:20 00:55:55 0.292
ABC 343 00:16:20 00:55:55 0.292


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 1383 01:05:55 04:07:02 0.267
test 92 00:04:23 00:16:32 0.265
TWILIGHT 160 00:07:37 00:15:16 0.499


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field5120 11 00:00:31 00:23:22 0.022
test 92 00:04:23 00:16:32 0.265
field11701_test 12 00:00:34 00:07:18 0.078
field11701 40 00:01:54 00:05:58 0.319
field11703 40 00:01:54 00:06:15 0.304
field11704 40 00:01:54 00:08:49 0.216
field11705 40 00:01:54 00:06:04 0.314
field12940 40 00:01:54 00:06:18 0.302
field11708 40 00:01:54 00:06:49 0.280
field11709 40 00:01:54 00:05:58 0.319
field11710 40 00:01:54 00:06:10 0.309
field12634 40 00:01:54 00:06:15 0.304
field12635 40 00:01:54 00:05:58 0.319
field12636 40 00:01:54 00:06:10 0.309
field12637 40 00:01:54 00:06:10 0.309
field12638 40 00:01:54 00:06:01 0.317
field12639 40 00:01:54 00:06:13 0.306
field11110 40 00:01:54 00:05:58 0.319
field12024 40 00:01:54 00:05:58 0.319
field12332 40 00:01:54 00:06:43 0.283
field12333 40 00:01:54 00:06:13 0.307
field12334 40 00:01:54 00:06:15 0.304
field12335 40 00:01:54 00:06:29 0.294
field12336 40 00:01:54 00:06:24 0.297
field11419 40 00:01:54 00:06:41 0.285
field11420 40 00:01:54 00:06:29 0.293
field11421 40 00:01:54 00:06:13 0.307
field11422 40 00:01:54 00:06:15 0.304
field11423 40 00:01:54 00:06:01 0.316
field11424 40 00:01:54 00:05:58 0.319
field12036 40 00:01:54 00:05:58 0.319
field12037 40 00:01:54 00:05:58 0.319
field11732 40 00:01:54 00:06:24 0.298
field11733 40 00:01:54 00:06:13 0.307
field11734 40 00:01:54 00:06:32 0.291
field11735 40 00:01:54 00:06:24 0.298
field11736 40 00:01:54 00:07:48 0.244
FLAT OH 160 00:07:37 00:15:16 0.499










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 145:59:27 236:33:02 0.617

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 1976:14:03 1029:23:12 946:50:50 265:07:02 227:14:36 227:14:36 227:14:36 186:46:16
Observed 1532:50:35
(77.56%)		 959:25:57
(93.20%)		 573:24:38
(60.56%)		 136:24:58
(51.46%)		 127:17:45
(56.02%)		 217:45:19
(95.82%)		 91:56:34
(40.46%)		 186:46:16
(N/A)
Remaining 443:23:27
(22.44%)		 69:57:15
(6.80%)		 373:26:11
(39.44%)		 128:42:03
(48.54%)		 99:56:50
(43.98%)		 09:29:16
(4.18%)		 135:18:01
(59.54%)		 00:00:00
(N/A)











Camera status (2025/09/22)



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