PRIME Observation Log 2025/09/19

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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: 2025/09/19
Local observer:
Remote observer: Ryusei
Weather: cloudy
Comment:
Detector Temperature: 116.00013 +- 0.00114 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:53:24
Morning 06:06:43
Science Observation
(Sun altitude < -10°)
Start 19:14:46
End 05:45:23
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:14:46
End 00:13:05


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 04:08:04 10:30:36 0.393
GB Time 04:08:04 04:58:19 0.832
Non-GB Time 00:00:00 05:32:17 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 2108 01:40:28 04:08:04 0.405


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
SKY 64 00:03:03 00:15:07 0.202
Bulge 2044 01:37:25 03:52:56 0.418


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GCsky_test 16 00:00:45 00:09:44 0.078
GCsky 48 00:02:17 00:05:23 0.425
GB76_dither OH 192 00:09:09 00:20:43 0.442
GB77_dither OH 192 00:09:09 00:21:31 0.425
GB78_dither OH 192 00:09:09 00:20:04 0.456
GB94_dither OH 192 00:09:09 00:20:41 0.442
GB111_dither OH 216 00:10:17 00:22:55 0.449
GB110_dither OH 216 00:10:17 00:25:17 0.407
GB109_dither OH 120 00:05:43 00:13:23 0.427
GB108_dither OH 48 00:02:17 00:05:11 0.441
GB91_dither OH 24 00:01:08 00:02:19 0.493
GB74_dither OH 24 00:01:08 00:03:01 0.379
GB92_dither OH 48 00:02:17 00:04:39 0.492
GB93_dither OH 48 00:02:17 00:05:13 0.437
GB75_dither OH 96 00:04:34 00:10:05 0.454
GB112_dither OH 96 00:04:34 00:11:05 0.412
GB79_dither OH 96 00:04:34 00:15:37 0.293
GB60_dither OH 48 00:02:17 00:05:00 0.456
GB111_test OH 4 00:00:11 00:06:27 0.030
GB95_dither OH 48 00:02:17 00:05:31 0.414
GB113_dither OH 48 00:02:17 00:04:38 0.493
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 00:02:35 0.440
GB80_dither OH 24 00:01:08 00:02:19 0.493










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 134:14:54 205:13:13 0.654

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 1980:09:25 1032:30:59 947:38:25 265:20:21 227:26:01 227:26:01 227:26:01 186:14:26
Observed 1521:06:02
(76.82%)		 955:19:59
(92.52%)		 565:46:03
(59.70%)		 134:55:40
(50.85%)		 126:21:50
(55.56%)		 213:27:53
(93.86%)		 91:00:39
(40.02%)		 186:14:26
(N/A)
Remaining 459:03:22
(23.18%)		 77:11:00
(7.48%)		 381:52:22
(40.30%)		 130:24:41
(49.15%)		 101:04:10
(44.44%)		 13:58:08
(6.14%)		 136:25:21
(59.98%)		 00:00:00
(N/A)











Camera status (2025/09/19)



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