PRIME Observation Log 2025/09/18

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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: 2025/09/18
Local observer: None
Remote observer: Yui,Shuma,Kanuke
Weather: clear
Comment:
Detector Temperature: 116.00015 +- 0.00144 K
ImageAcquisitionErrors occurred 2 times @
2025-09-18 20:56:28 SAT
2025-09-19 03:57:14 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:52:46
Morning 06:08:04
Science Observation
(Sun altitude < -10°)
Start 19:14:07
End 05:46:44
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:14:07
End 00:17:01


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 10:37:48 10:32:36 1.008
GB Time 04:55:57 05:02:53 0.977
Non-GB Time 05:41:51 05:29:42 1.037


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 392 00:18:41 00:40:14 0.464
GB 2376 01:53:15 04:55:57 0.383
SAAO 795 00:37:53 01:25:27 0.443
OU 795 00:37:53 01:25:27 0.443
NASA 795 00:37:53 01:25:27 0.443
ABC 795 00:37:53 01:25:27 0.443


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 392 00:18:41 00:40:14 0.464
Bulge 2352 01:52:06 04:52:10 0.384
SKY 24 00:01:08 00:03:46 0.304
all_sky_grid 3180 02:31:34 05:41:51 0.443


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 392 00:18:41 00:40:14 0.464
GB76_dither_test OH 48 00:02:17 00:14:35 0.157
GB76_dither OH 144 00:06:51 00:14:34 0.471
GB77_dither OH 144 00:06:51 00:14:51 0.462
GB78_dither OH 156 00:07:26 00:19:07 0.389
GB94_dither_test OH 28 00:01:20 00:07:58 0.167
GB94_dither OH 144 00:06:51 00:14:45 0.465
GB111_dither OH 144 00:06:51 00:14:34 0.471
GB110_dither OH 168 00:08:00 00:26:05 0.307
GB109_dither OH 72 00:03:25 00:07:28 0.459
GB108_dither OH 24 00:01:08 00:02:43 0.419
GB91_dither OH 24 00:01:08 00:02:16 0.503
GB74_dither OH 24 00:01:08 00:02:38 0.432
GB92_dither OH 48 00:02:17 00:05:06 0.448
GB93_dither OH 48 00:02:17 00:04:52 0.470
GB75_dither OH 48 00:02:17 00:05:06 0.448
GB112_dither OH 72 00:03:25 00:07:19 0.468
GB79_dither OH 72 00:03:25 00:07:31 0.456
GB60_dither OH 48 00:02:17 00:04:57 0.461
GB95_dither OH 24 00:01:08 00:02:33 0.448
GB113_dither OH 24 00:01:08 00:02:30 0.456
GB114_dither OH 24 00:01:08 00:02:16 0.503
GB97_dither OH 24 00:01:08 00:02:16 0.503
GB96_dither OH 24 00:01:08 00:02:30 0.456
GB80_dither OH 24 00:01:08 00:02:16 0.503
GCsky 24 00:01:08 00:03:46 0.304
GB78_test OJ 20 00:00:57 00:06:11 0.154
GB78_dither OJ 48 00:02:17 00:04:41 0.488
GB79_dither OJ 48 00:02:17 00:06:02 0.379
GB80_test OJ 24 00:01:08 00:06:17 0.182
GB80_dither OJ 48 00:02:17 00:04:32 0.503
GB97_dither OJ 48 00:02:17 00:04:32 0.503
GB96_dither OJ 48 00:02:17 00:04:49 0.474
GB95_dither OJ 48 00:02:17 00:04:46 0.479
GB112_dither OJ 48 00:02:17 00:04:46 0.479
GB113_dither OJ 48 00:02:17 00:04:49 0.474
GB114_dither OJ 48 00:02:17 00:04:52 0.470
GB109_dither OJ 48 00:02:17 00:05:23 0.425
GB108_dither OJ 48 00:02:17 00:04:35 0.498
GB91_dither OJ 48 00:02:17 00:04:49 0.474
GB74_dither OJ 48 00:02:17 00:07:01 0.326
GB76_test OH 84 00:04:00 00:23:02 0.174
field5293_test 36 00:01:42 00:10:50 0.158
field5293 40 00:01:54 00:05:11 0.367
field5294 40 00:01:54 00:03:50 0.497
field5295 40 00:01:54 00:03:55 0.485
field6527 40 00:01:54 00:03:52 0.491
field7311 40 00:01:54 00:03:50 0.497
field7312 40 00:01:54 00:03:55 0.485
field8407 40 00:01:54 00:03:50 0.497
field8408 40 00:01:54 00:04:01 0.474
field11942 40 00:01:54 00:04:04 0.469
field8719 40 00:01:54 00:03:47 0.503
field8720 40 00:01:54 00:03:52 0.491
field8721 40 00:01:54 00:03:52 0.491
field8722 40 00:01:54 00:03:52 0.491
field8723 40 00:01:54 00:03:50 0.497
field8724 40 00:01:54 00:03:47 0.503
field8725 40 00:01:54 00:03:50 0.497
field8726 40 00:01:54 00:03:47 0.503
field8727 40 00:01:54 00:03:47 0.503
field8728 40 00:01:54 00:03:50 0.497
field8729 40 00:01:54 00:03:50 0.497
field8730 40 00:01:54 00:03:52 0.491
field8731 40 00:01:54 00:03:52 0.491
field8732 40 00:01:54 00:03:55 0.485
field8733 40 00:01:54 00:03:55 0.485
field8734 40 00:01:54 00:03:52 0.491
field8176 40 00:01:54 00:06:13 0.306
field8177 40 00:01:54 00:07:14 0.263
field8178 40 00:01:54 00:03:52 0.491
field8735 40 00:01:54 00:04:01 0.474
field8736 40 00:01:54 00:04:04 0.469
field8737 40 00:01:54 00:03:58 0.480
field8738 40 00:01:54 00:04:12 0.453
field8739 40 00:01:54 00:04:26 0.429
field8740 40 00:01:54 00:04:01 0.474
field8741 40 00:01:54 00:04:15 0.448
field8742 40 00:01:54 00:04:09 0.458
field8743 40 00:01:54 00:04:12 0.453
field8744 40 00:01:54 00:04:09 0.458
field8745 40 00:01:54 00:04:12 0.453
field8467 40 00:01:54 00:04:03 0.469
field8747 40 00:01:54 00:04:01 0.474
field8748 40 00:01:54 00:04:01 0.474
field8469 40 00:01:54 00:04:01 0.474
field8470 40 00:01:54 00:04:12 0.453
field8471 40 00:01:54 00:04:06 0.463
field8472 40 00:01:54 00:04:04 0.469
field8473 40 00:01:54 00:04:01 0.474
field8474 40 00:01:54 00:03:55 0.485
field8756 40 00:01:54 00:03:50 0.497
field8757 40 00:01:54 00:04:00 0.475
field8758 40 00:01:54 00:04:10 0.457
field8759 40 00:01:54 00:03:58 0.480
field8760 40 00:01:54 00:04:15 0.448
field8761 64 00:03:03 00:12:35 0.242
field8480 40 00:01:54 00:04:01 0.474
field8481 40 00:01:54 00:04:12 0.452
field8482 40 00:01:54 00:04:01 0.474
field8762 40 00:01:54 00:03:55 0.487
field8763 40 00:01:54 00:03:59 0.478
field8764 40 00:01:54 00:04:32 0.420
field8765 40 00:01:54 00:04:06 0.463
field8766 40 00:01:54 00:04:04 0.469
field8487 40 00:01:54 00:04:12 0.453
field8488 40 00:01:54 00:04:06 0.463
field8768 40 00:01:54 00:04:04 0.468
field8769 40 00:01:54 00:03:58 0.480
field8770 40 00:01:54 00:04:04 0.469
field8771 40 00:01:54 00:04:18 0.443
field8772 40 00:01:54 00:03:58 0.480
field8773 40 00:01:54 00:04:09 0.458
field8774 40 00:01:54 00:03:50 0.497
field8775 40 00:01:54 00:04:01 0.474
field8776 40 00:01:54 00:04:06 0.463
field8777 40 00:01:54 00:04:04 0.469
field8778 40 00:01:54 00:04:12 0.453
field8779 40 00:01:54 00:03:52 0.493
field8780 40 00:01:54 00:04:01 0.473
field8781 40 00:01:54 00:06:34 0.290










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 130:06:49 194:42:36 0.668

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 1981:16:39 1030:52:04 950:24:34 266:06:52 228:05:53 228:05:53 228:05:53 186:14:26
Observed 1516:57:58
(76.57%)		 951:11:55
(92.27%)		 565:46:03
(59.53%)		 134:55:40
(50.70%)		 126:21:50
(55.40%)		 213:27:53
(93.58%)		 91:00:39
(39.90%)		 186:14:26
(N/A)
Remaining 464:18:40
(23.43%)		 79:40:09
(7.73%)		 384:38:30
(40.47%)		 131:11:12
(49.30%)		 101:44:03
(44.60%)		 14:38:00
(6.42%)		 137:05:14
(60.10%)		 00:00:00
(N/A)











Camera status (2025/09/18)



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