PRIME Observation Log 2025/04/17

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Raw Log (Time is in SA time)
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Observation Log (Time is in UT)

Date: 2025/04/17
Local observer: Seiya Nakayama
Remote observer: Ryusei Hamada
Weather: clear
Comment:
Detector Temperature: 114.00006 +- 0.00195 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:35:07
Morning 06:37:35
Science Observation
(Sun altitude < -10°)
Start 18:56:37
End 06:16:03
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 22:53:12
End 06:16:03


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:19:51 11:19:26 1.001
GB Time 07:18:41 07:22:50 0.991
Non-GB Time 04:01:10 03:56:35 1.019


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 3928 03:07:14 07:18:41 0.427
CALIB 540 00:25:44 00:48:43 0.528
ALLSKY 2468 01:57:38 04:01:10 0.488
SAAO 617 00:29:24 01:00:17 0.488
OU 617 00:29:24 01:00:17 0.488
NASA 617 00:29:24 01:00:17 0.488
ABC 617 00:29:24 01:00:17 0.488


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 3784 03:00:22 07:01:24 0.428
TWILIGHT 540 00:25:44 00:48:43 0.528
all_sky_grid 2468 01:57:38 04:01:10 0.488
SKY 144 00:06:51 00:17:16 0.397


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB109_dither OH 148 00:07:03 00:14:47 0.477
FLAT_test OJ 20 00:00:57 00:03:17 0.289
FLAT OJ 520 00:24:47 00:45:26 0.546
field13040_test 68 00:03:14 00:10:16 0.316
field13040 40 00:01:54 00:03:52 0.491
field13041 40 00:01:54 00:03:50 0.497
field13042 40 00:01:54 00:03:50 0.497
field13043 40 00:01:54 00:03:50 0.497
field13044 40 00:01:54 00:03:47 0.503
field13045 40 00:01:54 00:03:47 0.503
field13046 40 00:01:54 00:03:47 0.503
field13047 40 00:01:54 00:03:50 0.497
field13048 40 00:01:54 00:03:50 0.497
field13049 40 00:01:54 00:03:52 0.491
field13050 40 00:01:54 00:03:50 0.497
field13051 40 00:01:54 00:03:50 0.497
field13052 40 00:01:54 00:03:52 0.491
field13053 40 00:01:54 00:03:52 0.491
field13054 40 00:01:54 00:03:50 0.497
field13055 40 00:01:54 00:03:47 0.503
field13056 40 00:01:54 00:03:47 0.503
field13057 40 00:01:54 00:03:47 0.503
field13058 40 00:01:54 00:03:47 0.503
field13059 40 00:01:54 00:03:47 0.503
field13060 40 00:01:54 00:03:50 0.497
field13061 40 00:01:54 00:03:52 0.491
field13062 40 00:01:54 00:03:52 0.491
field13063 40 00:01:54 00:03:55 0.485
field13064 40 00:01:54 00:03:50 0.497
field13065 40 00:01:54 00:03:50 0.497
field13066 40 00:01:54 00:03:50 0.497
field13067 40 00:01:54 00:03:50 0.497
field13068 40 00:01:54 00:03:50 0.497
field13069 40 00:01:54 00:03:50 0.497
field13070 40 00:01:54 00:03:47 0.503
field13071 40 00:01:54 00:03:50 0.497
field13072 40 00:01:54 00:03:47 0.503
field13073 40 00:01:54 00:03:50 0.497
field13074 40 00:01:54 00:03:50 0.497
field13075 40 00:01:54 00:03:50 0.497
field13076 40 00:01:54 00:03:52 0.491
field13077 40 00:01:54 00:03:52 0.491
field13078 40 00:01:54 00:03:52 0.491
field13079 40 00:01:54 00:03:47 0.503
field13080 40 00:01:54 00:03:47 0.503
field13081 40 00:01:54 00:03:47 0.503
field13082 40 00:01:54 00:03:47 0.503
field13083 40 00:01:54 00:03:47 0.503
field13084 40 00:01:54 00:03:47 0.503
field13085 40 00:01:54 00:03:47 0.503
field13086 40 00:01:54 00:03:47 0.503
field13087 40 00:01:54 00:03:50 0.497
field13088 40 00:01:54 00:03:52 0.491
field13089 40 00:01:54 00:03:52 0.491
field13090 40 00:01:54 00:03:52 0.491
field13091 40 00:01:54 00:03:50 0.497
field13092 40 00:01:54 00:03:50 0.497
field13093 40 00:01:54 00:03:50 0.497
field13094 40 00:01:54 00:03:50 0.497
field13095 40 00:01:54 00:03:50 0.497
field13096 40 00:01:54 00:03:50 0.497
field13097 40 00:01:54 00:03:47 0.503
field13098 40 00:01:54 00:04:04 0.469
field13099 40 00:01:54 00:04:40 0.408
GB63_dither_test OH 4 00:00:11 00:07:11 0.026
GB97_dither_test OH 12 00:00:34 00:05:03 0.113
GB80_dither_test OH 116 00:05:31 00:26:29 0.209
GB125_dither_test OH 8 00:00:22 00:02:31 0.151
GB131_dither_test OH 76 00:03:37 00:10:53 0.333
GB131_dither OH 168 00:08:00 00:16:36 0.482
GB130_dither OH 168 00:08:00 00:16:36 0.482
GB129_dither OH 168 00:08:00 00:16:33 0.484
GB128_dither OH 168 00:08:00 00:16:36 0.482
GB127_dither OH 168 00:08:00 00:19:19 0.415
GB126_dither_test OH 104 00:04:57 00:15:44 0.315
GB126_dither OH 168 00:08:00 00:16:30 0.485
GB125_dither OH 168 00:08:00 00:16:22 0.489
GB108_dither OH 168 00:08:00 00:18:03 0.443
GB110_dither OH 144 00:06:51 00:14:08 0.485
GB111_dither OH 144 00:06:51 00:14:09 0.485
GB112_dither OH 144 00:06:51 00:14:22 0.477
GB113_dither OH 144 00:06:51 00:14:20 0.479
GB114_dither OH 144 00:06:51 00:15:07 0.454
GB97_dither OH 120 00:05:43 00:11:49 0.483
GB96_dither OH 120 00:05:43 00:12:00 0.476
GB95_dither OH 120 00:05:43 00:12:06 0.472
GB94_dither OH 96 00:04:34 00:09:22 0.488
GB93_dither OH 120 00:05:43 00:11:52 0.482
GB92_dither OH 144 00:06:51 00:14:20 0.479
GB91_dither OH 144 00:06:51 00:14:48 0.464
GB74_dither OH 168 00:08:00 00:16:47 0.477
GB75_dither OH 48 00:02:17 00:08:44 0.261
GB76_dither OH 24 00:01:08 00:02:16 0.503
GB77_dither OH 24 00:01:08 00:02:19 0.493
GB78_dither OH 24 00:01:08 00:02:22 0.483
GB79_dither OH 4 00:00:11 00:01:04 0.177
GCsky 144 00:06:51 00:17:16 0.397
GB57_dither OH 96 00:04:34 00:09:58 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 82:36:21 188:24:51 0.438

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 1774:40:58 901:25:18 873:15:39 244:30:47 209:34:57 209:34:57 209:34:57 117:14:05
Observed 399:04:19
(22.49%)		 131:20:40
(14.57%)		 267:43:38
(30.66%)		 35:45:00
(14.62%)		 65:36:49
(31.31%)		 134:29:22
(64.17%)		 31:52:25
(15.21%)		 117:14:05
(N/A)
Remaining 1375:36:38
(77.51%)		 770:04:37
(85.43%)		 605:32:00
(69.34%)		 208:45:46
(85.38%)		 143:58:07
(68.69%)		 75:05:35
(35.83%)		 177:42:31
(84.79%)		 00:00:00
(N/A)











Camera status (2025/04/17)