PRIME Observation Log 2025/09/16

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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: 2025/09/16
Local observer:
Remote observer: Ryusei
Weather: cloudy
Comment:
Detector Temperature: 116.00003 +- 0.00114 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:51:31
Morning 06:10:44
Science Observation
(Sun altitude < -10°)
Start 19:12:51
End 05:49:25
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:12:51
End 00:24:52


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:55:13 10:36:33 0.275
GB Time 02:55:13 05:12:01 0.562
Non-GB Time 00:00:00 05:24:32 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 36 00:01:42 00:04:55 0.349
GB 1508 01:11:52 02:55:13 0.410


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 36 00:01:42 00:04:55 0.349
SKY 68 00:03:14 00:11:59 0.270
Bulge 1440 01:08:38 02:43:14 0.421


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OH 4 00:00:11 00:01:37 0.117
FLAT OH 32 00:01:31 00:03:17 0.463
GCsky_test 20 00:00:57 00:06:31 0.146
GCsky 48 00:02:17 00:05:28 0.418
GB76_dither OH 132 00:06:17 00:14:32 0.433
GB77_dither OH 120 00:05:43 00:13:11 0.434
GB78_dither OH 136 00:06:28 00:14:56 0.434
GB78_test OH 16 00:00:45 00:08:58 0.085
GB94_dither OH 120 00:05:43 00:12:45 0.448
GB111_dither OH 144 00:06:51 00:16:15 0.422
GB110_dither OH 144 00:06:51 00:15:36 0.440
GB109_dither OH 96 00:04:34 00:10:33 0.434
GB108_dither OH 24 00:01:08 00:02:16 0.503
GB91_dither OH 24 00:01:08 00:02:16 0.503
GB74_dither OH 24 00:01:08 00:02:42 0.423
GB92_dither OH 48 00:02:17 00:04:59 0.458
GB93_dither OH 48 00:02:17 00:04:41 0.488
GB75_dither OH 72 00:03:25 00:07:48 0.439
GB112_dither OH 48 00:02:17 00:05:07 0.446
GB79_dither OH 48 00:02:17 00:05:57 0.384
GB60_dither OH 24 00:01:08 00:02:35 0.442
GB95_dither OH 24 00:01:08 00:02:19 0.493
GB113_dither OH 24 00:01:08 00:02:40 0.429
GB114_dither OH 24 00:01:08 00:02:48 0.407
GB97_dither OH 24 00:01:08 00:02:16 0.503
GB96_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:16 0.503
GB107_dither OH 24 00:01:08 00:02:37 0.435
GB106_dither OH 4 00:00:11 00:00:41 0.276










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 108:38:23 173:35:24 0.626

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 1970:21:49 1026:00:42 944:21:06 264:25:06 226:38:39 226:38:39 226:38:39 185:01:04
Observed 1495:29:32
(75.90%)		 941:15:22
(91.74%)		 554:14:09
(58.69%)		 132:02:41
(49.94%)		 123:28:52
(54.48%)		 210:34:54
(92.91%)		 88:07:41
(38.88%)		 185:01:04
(N/A)
Remaining 474:52:16
(24.10%)		 84:45:20
(8.26%)		 390:06:56
(41.31%)		 132:22:24
(50.06%)		 103:09:47
(45.52%)		 16:03:45
(7.09%)		 138:30:58
(61.12%)		 00:00:00
(N/A)











Camera status (2025/09/16)



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