PRIME Observation Log 2025/04/14

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Observation Log (Time is in UT)

Date: 2025/04/14
Local observer: Seiya Nakayama, Ryo Ogawa
Remote observer:
Weather: clear
Comment:
Detector Temperature: 114.00037 +- 0.00555 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:38:30
Morning 06:35:36
Science Observation
(Sun altitude < -10°)
Start 18:59:57
End 06:14:08
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 23:05:00
End 06:14:08


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 05:24:37 11:14:11 0.482
GB Time 01:17:30 07:09:07 0.181
Non-GB Time 04:07:06 04:05:03 1.008


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.)
ALLSKY 2484 01:58:24 04:07:06 0.479
CALIB 252 00:12:00 00:23:57 0.501
GB 728 00:34:42 01:17:30 0.448
SAAO 621 00:29:36 01:01:46 0.479
OU 621 00:29:36 01:01:46 0.479
NASA 621 00:29:36 01:01:46 0.479
ABC 621 00:29:36 01:01:46 0.479


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 2484 01:58:24 04:07:06 0.479
TWILIGHT 252 00:12:00 00:23:57 0.501
Bulge 728 00:34:42 01:17:30 0.448


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field10912 4 00:00:11 00:00:41 0.276
FLAT_test ZO 12 00:00:34 00:02:35 0.221
FLAT ZO 240 00:11:26 00:21:22 0.535
field12420_test 44 00:02:05 00:08:19 0.252
field12420 40 00:01:54 00:03:50 0.497
field12421 40 00:01:54 00:03:52 0.491
field12422 40 00:01:54 00:03:52 0.491
field12423 40 00:01:54 00:03:52 0.491
field12424 40 00:01:54 00:03:47 0.503
field12425 40 00:01:54 00:03:47 0.503
field12426 40 00:01:54 00:03:47 0.503
field12427 40 00:01:54 00:03:47 0.503
field12428 40 00:01:54 00:03:47 0.503
field12429 40 00:01:54 00:03:47 0.503
field12430 40 00:01:54 00:03:52 0.491
field12431 40 00:01:54 00:03:52 0.491
field12432 40 00:01:54 00:03:50 0.497
field12433 40 00:01:54 00:03:50 0.497
field12434 40 00:01:54 00:03:52 0.491
field12435 40 00:01:54 00:03:50 0.497
field12436 40 00:01:54 00:03:50 0.497
field12437 40 00:01:54 00:03:50 0.497
field12438 40 00:01:54 00:03:47 0.503
field12439 40 00:01:54 00:03:47 0.503
field12440 40 00:01:54 00:03:47 0.503
field12441 40 00:01:54 00:03:47 0.503
field12442 40 00:01:54 00:03:50 0.497
field12443 40 00:01:54 00:03:52 0.491
field12444 40 00:01:54 00:03:52 0.491
field12445 40 00:01:54 00:03:50 0.497
field12446 40 00:01:54 00:03:50 0.497
field12447 40 00:01:54 00:03:52 0.491
field12448 40 00:01:54 00:03:50 0.497
field12449 40 00:01:54 00:04:09 0.458
field12450_test 76 00:03:37 00:10:02 0.361
field12450 40 00:01:54 00:03:47 0.503
field12451 40 00:01:54 00:03:47 0.503
field12452 40 00:01:54 00:03:47 0.503
field12453 40 00:01:54 00:03:50 0.497
field12454 40 00:01:54 00:03:50 0.497
field12455 40 00:01:54 00:03:50 0.497
field12456 40 00:01:54 00:03:52 0.491
field12457 40 00:01:54 00:03:55 0.485
field12458 40 00:01:54 00:03:52 0.491
field12459 40 00:01:54 00:03:50 0.497
field12460 40 00:01:54 00:03:47 0.503
field12461 40 00:01:54 00:03:47 0.503
field12462 40 00:01:54 00:03:47 0.503
field12463 40 00:01:54 00:03:47 0.503
field12464 40 00:01:54 00:03:47 0.503
field12465 40 00:01:54 00:03:47 0.503
field12466 40 00:01:54 00:03:47 0.503
field12467 40 00:01:54 00:03:47 0.503
field12468 40 00:01:54 00:03:50 0.497
field12469 40 00:01:54 00:03:52 0.491
field12470 40 00:01:54 00:03:52 0.491
field12471 40 00:01:54 00:03:50 0.497
field12472 40 00:01:54 00:03:52 0.491
field12473 40 00:01:54 00:03:52 0.491
field12474 40 00:01:54 00:03:47 0.503
field12475 40 00:01:54 00:03:47 0.503
field12476 40 00:01:54 00:03:47 0.503
field12477 40 00:01:54 00:03:47 0.503
field12478 40 00:01:54 00:05:42 0.334
GB63_dither_test OH 96 00:04:34 00:12:52 0.355
GB63_dither OH 24 00:01:08 00:02:16 0.503
GB62_dither OH 24 00:01:08 00:02:16 0.503
GB61_dither OH 24 00:01:08 00:02:19 0.493
GB60_dither OH 24 00:01:08 00:02:19 0.493
GB59_dither OH 24 00:01:08 00:02:19 0.493
GB58_dither OH 32 00:01:31 00:06:15 0.244
GB57_dither OH 24 00:01:08 00:02:16 0.503
GB74_dither OH 28 00:01:20 00:03:07 0.428
GB75_dither OH 24 00:01:08 00:02:16 0.503
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 00:02:16 0.503
GB79_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:19 0.493
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB96_dither OH 24 00:01:08 00:02:19 0.493
GB95_dither OH 24 00:01:08 00:02:19 0.493
GB94_dither OH 24 00:01:08 00:02:21 0.484
GB93_dither OH 24 00:01:08 00:02:19 0.493
GB92_dither OH 24 00:01:08 00:02:19 0.493
GB91_dither OH 24 00:01:08 00:02:16 0.503
GB108_dither OH 24 00:01:08 00:02:16 0.503
GB109_dither OH 24 00:01:08 00:02:19 0.493
GB110_dither OH 24 00:01:08 00:02:19 0.493
GB111_dither OH 24 00:01:08 00:02:19 0.493
GB112_dither OH 20 00:00:57 00:02:12 0.432










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 56:23:51 154:31:45 0.365

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 1765:25:00 897:08:15 868:16:45 243:07:05 208:23:13 208:23:13 208:23:13 115:39:28
Observed 372:51:48
(21.12%)		 116:06:12
(12.94%)		 256:45:36
(29.57%)		 33:00:29
(13.58%)		 62:52:18
(30.17%)		 131:44:51
(63.22%)		 29:07:55
(13.98%)		 115:39:28
(N/A)
Remaining 1392:33:11
(78.88%)		 781:02:02
(87.06%)		 611:31:09
(70.43%)		 210:06:35
(86.42%)		 145:30:54
(69.83%)		 76:38:21
(36.78%)		 179:15:17
(86.02%)		 00:00:00
(N/A)











Camera status (2025/04/14)