PRIME Observation Log 2025/04/26

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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: 2025/04/26
Local observer: Seiya Nakayama
Remote observer:
Weather: clear
Comment:
Detector Temperature: 113.99994 +- 0.00130 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:25:40
Morning 06:43:35
Science Observation
(Sun altitude < -10°)
Start 18:47:24
End 06:21:49
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 22:17:49
End 06:21:49


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:32:25 11:34:24 0.997
GB Time 07:57:27 08:03:59 0.987
Non-GB Time 03:34:57 03:30:25 1.022


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 508 00:24:12 00:47:30 0.510
ALLSKY 2204 01:45:03 03:34:57 0.489
GB 4620 03:40:13 07:57:27 0.461
SAAO 551 00:26:15 00:53:44 0.489
OU 551 00:26:15 00:53:44 0.489
NASA 551 00:26:15 00:53:44 0.489
ABC 551 00:26:15 00:53:44 0.489


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 508 00:24:12 00:47:30 0.510
all_sky_grid 2204 01:45:03 03:34:57 0.489
Bulge 4500 03:34:30 07:42:44 0.464
SKY 120 00:05:43 00:14:43 0.388


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 4 00:00:11 00:00:41 0.276
FLAT_test ZO 28 00:01:20 00:05:21 0.249
FLAT ZO 476 00:22:41 00:41:27 0.547
field9737_test 52 00:02:28 00:06:47 0.365
field9737 40 00:01:54 00:03:52 0.491
field9738 40 00:01:54 00:03:55 0.485
field9739 40 00:01:54 00:03:50 0.497
field9740 40 00:01:54 00:03:58 0.480
field9741 40 00:01:54 00:03:50 0.497
field9742 40 00:01:54 00:03:47 0.503
field9743 40 00:01:54 00:03:47 0.503
field9744 40 00:01:54 00:03:47 0.503
field9745 40 00:01:54 00:03:47 0.503
field9746 40 00:01:54 00:03:47 0.503
field9747 40 00:01:54 00:03:47 0.503
field9748 40 00:01:54 00:03:50 0.497
field9749 40 00:01:54 00:03:50 0.497
field9750 40 00:01:54 00:03:47 0.503
field9751 40 00:01:54 00:03:47 0.503
field9752 40 00:01:54 00:03:47 0.503
field9753 40 00:01:54 00:03:47 0.503
field9754 40 00:01:54 00:03:47 0.503
field9755 40 00:01:54 00:03:47 0.503
field9756 40 00:01:54 00:03:50 0.497
field9757 40 00:01:54 00:03:52 0.491
field9758 40 00:01:54 00:03:50 0.497
field9759 40 00:01:54 00:03:50 0.497
field9760 40 00:01:54 00:03:50 0.497
field9761 40 00:01:54 00:03:50 0.497
field9762 40 00:01:54 00:03:50 0.497
field9763 40 00:01:54 00:03:47 0.503
field9764 40 00:01:54 00:03:47 0.503
field9765 40 00:01:54 00:03:47 0.503
field9766 40 00:01:54 00:03:47 0.503
field9767 40 00:01:54 00:03:47 0.503
field9768 40 00:01:54 00:03:47 0.503
field9769 40 00:01:54 00:03:47 0.503
field9770 40 00:01:54 00:03:47 0.503
field9771 40 00:01:54 00:03:47 0.503
field9772 40 00:01:54 00:03:47 0.503
field9773 40 00:01:54 00:03:47 0.503
field9774 40 00:01:54 00:03:47 0.503
field9775 40 00:01:54 00:03:47 0.503
field9776 40 00:01:54 00:03:47 0.503
field9777 40 00:01:54 00:03:47 0.503
field9778 40 00:01:54 00:04:18 0.443
field3736_test 32 00:01:31 00:04:48 0.317
field3736 40 00:01:54 00:03:50 0.497
field3939 40 00:01:54 00:03:47 0.503
field3940 40 00:01:54 00:03:47 0.503
field3941 40 00:01:54 00:03:47 0.503
field3942 40 00:01:54 00:03:52 0.491
field4150 40 00:01:54 00:03:50 0.497
field4151 40 00:01:54 00:03:50 0.497
field4152 40 00:01:54 00:03:50 0.497
field4366 40 00:01:54 00:03:47 0.503
field4367 40 00:01:54 00:03:52 0.491
field5036 40 00:01:54 00:04:32 0.420
GB63_dither_test OH 100 00:04:46 00:12:13 0.390
GB63_dither OH 144 00:06:51 00:14:42 0.467
GB62_dither OH 144 00:06:51 00:14:08 0.485
GB61_dither OH 144 00:06:51 00:14:03 0.488
GB60_dither OH 144 00:06:51 00:14:11 0.484
GB59_dither OH 144 00:06:51 00:15:07 0.454
GB58_dither OH 148 00:07:03 00:19:59 0.353
GB57_dither OH 144 00:06:51 00:14:53 0.461
GB74_dither OH 144 00:06:51 00:16:03 0.427
GB75_dither OH 120 00:05:43 00:11:49 0.483
GB76_dither OH 120 00:05:43 00:11:58 0.478
GB77_dither OH 120 00:05:43 00:11:38 0.491
GB78_dither OH 120 00:05:43 00:11:55 0.480
GB79_dither OH 120 00:05:43 00:11:38 0.491
GB80_dither OH 120 00:05:43 00:11:55 0.480
GB97_dither OH 120 00:05:43 00:11:49 0.484
GB96_dither OH 120 00:05:43 00:11:58 0.478
GB95_dither OH 120 00:05:43 00:11:38 0.491
GB94_dither OH 120 00:05:43 00:11:52 0.482
GB93_dither OH 120 00:05:43 00:11:41 0.489
GB92_dither OH 120 00:05:43 00:11:44 0.487
GB91_dither OH 120 00:05:43 00:11:46 0.485
GB108_dither OH 120 00:05:43 00:11:41 0.489
GB109_dither OH 120 00:05:43 00:11:47 0.485
GB110_dither OH 120 00:05:43 00:11:55 0.480
GB111_dither OH 120 00:05:43 00:11:47 0.485
GB112_dither OH 124 00:05:54 00:14:01 0.421
GB113_dither OH 120 00:05:43 00:11:58 0.478
GB114_dither OH 120 00:05:43 00:12:01 0.476
GB131_dither OH 120 00:05:43 00:12:45 0.448
GB130_dither OH 120 00:05:43 00:11:49 0.484
GB129_dither OH 120 00:05:43 00:12:03 0.474
GB128_dither OH 120 00:05:43 00:12:00 0.476
GB127_dither OH 120 00:05:43 00:14:49 0.386
GB126_dither OH 120 00:05:43 00:12:15 0.467
GB125_dither OH 120 00:05:43 00:12:54 0.443
GCsky 120 00:05:43 00:14:43 0.388










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 134:04:52 291:35:38 0.460

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 1774:34:05 897:41:04 876:53:00 245:31:38 210:27:07 210:27:07 210:27:07 125:13:40
Observed 450:32:49
(25.39%)		 162:32:06
(18.11%)		 288:00:43
(32.84%)		 37:51:22
(15.42%)		 67:43:11
(32.18%)		 148:27:21
(70.54%)		 33:58:47
(16.15%)		 125:13:40
(N/A)
Remaining 1324:01:15
(74.61%)		 735:08:57
(81.89%)		 588:52:17
(67.16%)		 207:40:16
(84.58%)		 142:43:55
(67.82%)		 61:59:45
(29.46%)		 176:28:19
(83.85%)		 00:00:00
(N/A)











Camera status (2025/04/26)