PRIME Observation Log 2025/09/17

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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: 2025/09/17
Local observer: None
Remote observer: Takuto
Weather: Clear
Comment:
Detector Temperature: 116.00000 +- 0.00148 K
ImageAcquisitionErrors occurred 4 times @
2025-09-17 21:41:55 SAT
2025-09-17 22:41:00 SAT
2025-09-18 03:44:33 SAT
2025-09-18 05:55:16 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:52:08
Morning 06:09:24
Science Observation
(Sun altitude < -10°)
Start 19:13:29
End 05:48:05
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:13:29
End 00:20:56


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 10:50:38 10:34:35 1.025
GB Time 05:00:35 05:07:27 0.978
Non-GB Time 05:50:02 05:27:07 1.070


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.)
CALIB 280 00:13:20 00:33:07 0.403
GB 2532 02:00:41 05:00:35 0.402
SAAO 750 00:35:45 01:27:30 0.409
OU 750 00:35:45 01:27:30 0.409
NASA 750 00:35:45 01:27:30 0.409
ABC 750 00:35:45 01:27:30 0.409


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 280 00:13:20 00:33:07 0.403
Bulge 2460 01:57:15 04:51:31 0.402
SKY 72 00:03:25 00:09:03 0.379
all_sky_grid 3000 02:23:00 05:50:02 0.409


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 280 00:13:20 00:33:07 0.403
GB76_dither_test OH 56 00:02:40 00:26:27 0.101
GB76_dither OH 192 00:09:09 00:20:25 0.448
GB77_dither OH 208 00:09:54 00:24:08 0.411
GB78_dither OH 192 00:09:09 00:20:03 0.456
GB94_dither OH 192 00:09:09 00:20:05 0.455
GB111_dither OH 204 00:09:43 00:23:40 0.411
GB110_dither OH 192 00:09:09 00:20:22 0.449
GB109_dither OH 96 00:04:34 00:09:58 0.459
GB92_dither OH 48 00:02:17 00:05:11 0.440
GB93_dither OH 48 00:02:17 00:05:00 0.456
GB75_dither OH 96 00:04:34 00:10:01 0.456
GB112_dither OH 96 00:04:34 00:09:30 0.481
GB79_dither OH 96 00:04:34 00:09:58 0.459
GB60_dither OH 48 00:02:17 00:04:43 0.484
GB95_dither OH 48 00:02:17 00:05:03 0.452
GB113_dither OH 48 00:02:17 00:05:20 0.429
GCsky 72 00:03:25 00:09:03 0.379
GB60_dither OJ 48 00:02:17 00:08:53 0.257
GB80_dither OH 24 00:01:08 00:02:30 0.456
GB96_dither OH 24 00:01:08 00:02:33 0.448
GB97_dither OH 24 00:01:08 00:02:44 0.418
GB114_dither OH 24 00:01:08 00:02:24 0.474
GB108_dither OH 24 00:01:08 00:02:27 0.465
GB91_dither OH 24 00:01:08 00:02:16 0.503
GB74_dither OH 24 00:01:08 00:03:46 0.304
GB75_dither OJ 48 00:02:17 00:05:00 0.456
GB76_dither OJ 48 00:02:17 00:04:32 0.503
GB77_dither OJ 48 00:02:17 00:05:06 0.448
GB94_dither OJ 48 00:02:17 00:05:17 0.432
GB93_dither OJ 48 00:02:17 00:04:38 0.493
GB92_dither OJ 48 00:02:17 00:05:06 0.448
GB111_dither OJ 48 00:02:17 00:04:32 0.503
GB110_dither OJ 48 00:02:17 00:09:38 0.237
field6288_test 40 00:01:54 00:17:20 0.110
field6288 40 00:01:54 00:04:18 0.443
field6289 40 00:01:54 00:04:01 0.474
field6290 40 00:01:54 00:04:04 0.469
field6291 40 00:01:54 00:04:04 0.469
field6292 40 00:01:54 00:04:01 0.474
field6293 40 00:01:54 00:04:01 0.474
field6294 40 00:01:54 00:04:04 0.469
field6295 40 00:01:54 00:03:50 0.497
field6296 40 00:01:54 00:04:01 0.474
field6297 40 00:01:54 00:03:52 0.492
field6298 40 00:01:54 00:04:15 0.448
field6299 40 00:01:54 00:03:50 0.497
field6300 40 00:01:54 00:06:55 0.276
field8797 40 00:01:54 00:08:33 0.223
field12925 40 00:01:54 00:03:52 0.491
field12926 40 00:01:54 00:04:20 0.438
field12927 40 00:01:54 00:03:52 0.491
field12928 40 00:01:54 00:04:06 0.463
field12929 40 00:01:54 00:04:06 0.463
field12930 40 00:01:54 00:04:18 0.443
field12931 40 00:01:54 00:04:06 0.463
field12932 40 00:01:54 00:04:09 0.458
field12933 40 00:01:54 00:04:09 0.458
field12934 40 00:01:54 00:04:06 0.463
field12935 40 00:01:54 00:04:06 0.463
field12936 40 00:01:54 00:04:09 0.458
field12937 40 00:01:54 00:04:20 0.439
field12938 40 00:01:54 00:04:06 0.463
field12939 40 00:01:54 00:04:12 0.453
field11707 40 00:01:54 00:04:04 0.469
field12941 40 00:01:54 00:04:18 0.443
field12942 40 00:01:54 00:03:52 0.491
field12943 40 00:01:54 00:04:12 0.453
field11711 40 00:01:54 00:04:01 0.474
field11712 40 00:01:54 00:04:09 0.458
field11713 40 00:01:54 00:04:06 0.463
field11714 40 00:01:54 00:04:15 0.448
field11715 40 00:01:54 00:04:20 0.438
field11716 40 00:01:54 00:04:15 0.448
field11717 40 00:01:54 00:04:03 0.470
field11718 40 00:01:54 00:04:10 0.457
field12025 40 00:01:54 00:03:58 0.480
field12026 40 00:01:54 00:03:52 0.491
field12027 40 00:01:54 00:04:04 0.469
field12028 40 00:01:54 00:04:15 0.448
field12029 40 00:01:54 00:04:09 0.458
field12030 44 00:02:05 00:18:05 0.116
field12031 40 00:01:54 00:04:04 0.468
field12032 40 00:01:54 00:04:04 0.468
field12033 40 00:01:54 00:04:06 0.463
field12034 40 00:01:54 00:04:20 0.439
field12035 40 00:01:54 00:04:18 0.442
field11425 40 00:01:54 00:03:50 0.497
field11426 40 00:01:54 00:04:06 0.463
field11427 40 00:01:54 00:03:50 0.497
field11428 40 00:01:54 00:04:23 0.434
field11429 40 00:01:54 00:04:12 0.453
field11430 40 00:01:54 00:03:55 0.485
field11431 40 00:01:54 00:04:04 0.469
field11432 40 00:01:54 00:04:12 0.453
field11433 40 00:01:54 00:04:23 0.434
field11434 40 00:01:54 00:04:20 0.438
field11435 40 00:01:54 00:04:18 0.443
field11436 40 00:01:54 00:03:58 0.480
field12048 40 00:01:54 00:03:58 0.480
field12049 40 00:01:54 00:04:09 0.458
field12050 40 00:01:54 00:03:55 0.485
field12051 40 00:01:54 00:04:09 0.458
field11441 40 00:01:54 00:04:09 0.458
field11745 40 00:01:54 00:03:50 0.497
field11440 40 00:01:54 00:05:44 0.332
field4483 40 00:01:54 00:04:32 0.419
field4052 40 00:01:54 00:04:15 0.448
field3844 36 00:01:42 00:09:09 0.187










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 119:29:01 184:09:59 0.649

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 1975:55:09 1028:27:34 947:27:34 265:17:19 227:23:25 227:23:25 227:23:25 185:34:12
Observed 1506:20:10
(76.23%)		 946:15:57
(92.01%)		 560:04:12
(59.11%)		 133:30:12
(50.32%)		 124:56:22
(54.95%)		 212:02:25
(93.25%)		 89:35:11
(39.40%)		 185:34:12
(N/A)
Remaining 469:34:58
(23.77%)		 82:11:36
(7.99%)		 387:23:22
(40.89%)		 131:47:07
(49.68%)		 102:27:02
(45.05%)		 15:20:59
(6.75%)		 137:48:13
(60.60%)		 00:00:00
(N/A)











Camera status (2025/09/17)



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