PRIME Observation Log 2025/09/20

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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: 2025/09/20
Local observer:
Remote observer: ryusei
Weather: cloudy
Comment:
Detector Temperature: 115.99976 +- 0.00586 K
ImageAcquisitionErrors occurred 3 times @
2025-09-20 23:56:40 SAT
2025-09-21 02:45:58 SAT
2025-09-21 03:04:08 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:54:02
Morning 06:05:22
Science Observation
(Sun altitude < -10°)
Start 19:15:24
End 05:44:01
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:15:24
End 00:09:09


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 07:37:30 10:28:37 0.728
GB Time 04:05:57 04:53:44 0.837
Non-GB Time 03:31:32 05:34:52 0.632


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 2224 01:46:00 04:05:57 0.431
NASA 1426 01:07:58 03:21:31 0.337
SAAO 54 00:02:34 00:10:01 0.257


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
SKY 64 00:03:03 00:12:38 0.241
Bulge 2160 01:42:57 03:53:19 0.441
ToO 1426 01:07:58 03:21:31 0.337
all_sky_grid 54 00:02:34 00:10:01 0.257


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GCsky_test 16 00:00:45 00:07:18 0.104
GCsky 48 00:02:17 00:05:20 0.429
GB76_dither OH 216 00:10:17 00:22:22 0.460
GB77_dither OH 216 00:10:17 00:22:08 0.465
GB78_dither OH 216 00:10:17 00:22:47 0.452
GB94_dither OH 216 00:10:17 00:22:10 0.464
GB111_dither OH 216 00:10:17 00:23:45 0.433
GB110_dither OH 216 00:10:17 00:23:21 0.441
GB109_dither OH 120 00:05:43 00:12:34 0.455
GB108_dither OH 24 00:01:08 00:02:30 0.457
GB91_dither OH 24 00:01:08 00:02:30 0.456
GB74_dither OH 24 00:01:08 00:02:35 0.440
GB92_dither OH 72 00:03:25 00:07:25 0.462
GB93_dither OH 72 00:03:25 00:11:15 0.305
GB75_dither OH 96 00:04:34 00:10:21 0.442
GB112_dither OH 96 00:04:34 00:09:44 0.470
GB79_dither OH 96 00:04:34 00:11:50 0.387
GB60_dither OH 48 00:02:17 00:04:41 0.488
GB95_dither OH 48 00:02:17 00:05:42 0.400
GB113_dither OH 48 00:02:17 00:05:26 0.421
GB114_dither OH 24 00:01:08 00:02:16 0.503
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB96_dither OH 24 00:01:08 00:02:47 0.411
GB80_dither OH 24 00:01:08 00:02:38 0.432
no_grid_test 97 00:04:37 00:39:40 0.117
no_grid 1329 01:03:20 02:41:50 0.391
field5120_test 4 00:00:11 00:05:51 0.033
field5120 50 00:02:23 00:04:09 0.573










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 141:52:24 215:41:50 0.658

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 1982:32:37 1034:10:04 948:22:32 265:32:42 227:36:36 227:36:36 227:36:36 186:14:26
Observed 1528:43:33
(77.11%)		 959:25:57
(92.77%)		 569:17:36
(60.03%)		 135:05:41
(50.87%)		 126:21:50
(55.52%)		 216:49:24
(95.26%)		 91:00:39
(39.99%)		 186:14:26
(N/A)
Remaining 453:49:03
(22.89%)		 74:44:07
(7.23%)		 379:04:55
(39.97%)		 130:27:01
(49.13%)		 101:14:45
(44.48%)		 10:47:11
(4.74%)		 136:35:56
(60.01%)		 00:00:00
(N/A)











Camera status (2025/09/20)



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