PRIME Observation Log 2026/03/09

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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: 2026/03/09
Local observer:
Remote observer: Ryusei, Kansuke, Takuto
Weather: clear
Comment:
Detector Temperature: 112.97471 +- 0.18773 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:24:19
Morning 06:10:22
Science Observation
(Sun altitude < -10°)
Start 19:45:57
End 05:48:43
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 01:27:32
End 05:48:43


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 04:05:30 10:02:45 0.407
GB Time 04:05:30 04:21:10 0.940
Non-GB Time 00:00:00 05:41:35 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 284 00:13:32 00:29:17 0.462
GB 2060 01:38:11 04:05:30 0.400


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 284 00:13:32 00:29:17 0.462
Bulge 2012 01:35:54 04:00:33 0.399
SKY 48 00:02:17 00:04:57 0.461


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
test DY 4 00:00:11 00:02:00 0.095
FLAT OJ 80 00:03:48 00:09:59 0.382
test OH 16 00:00:45 00:14:07 0.054
GB76_dither_test OH 52 00:02:28 00:23:02 0.108
GB76_dither OH 192 00:09:09 00:18:24 0.497
GB77_dither OH 192 00:09:09 00:18:36 0.492
GB78_dither OH 192 00:09:09 00:18:36 0.492
GB94_dither OH 192 00:09:09 00:18:33 0.493
GB111_dither OH 192 00:09:09 00:18:38 0.491
GB110_dither OH 192 00:09:09 00:18:44 0.488
GB109_dither OH 96 00:04:34 00:09:27 0.484
GB92_dither OH 48 00:02:17 00:04:38 0.493
GB93_dither OH 48 00:02:17 00:04:43 0.484
GB75_dither OH 96 00:04:34 00:09:22 0.488
GB112_dither OH 96 00:04:34 00:09:19 0.491
GB79_dither OH 96 00:04:34 00:16:59 0.269
GB60_dither OH 48 00:02:17 00:04:43 0.484
GCsky 48 00:02:17 00:04:57 0.461
GB95_dither OH 48 00:02:17 00:04:43 0.484
GB113_dither OH 48 00:02:17 00:04:38 0.493
GB96_dither OH 24 00:01:08 00:02:21 0.484
GB80_dither OH 24 00:01:08 00:02:19 0.493
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 24 00:01:08 00:08:57 0.128
GB91_dither OH 24 00:01:08 00:02:21 0.484
GB108_dither OH 24 00:01:08 00:02:24 0.474
GB74_dither OH 24 00:01:08 00:02:24 0.474
FLAT ZO 200 00:09:32 00:17:17 0.551










Stats so far in 2026
Monthly observed fraction so far in 2026
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 55:55:01 259:31:55 0.215
Feb 99:19:50 259:06:19 0.383
Mar 44:27:54 89:08:29 0.499

Observed time so far in 2026
- Total time of each institute is calculated by the following
    [All observation time in 2026] = [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 2026] = [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 2026] = [All observation time in 2026] - [GB observation time in 2026]
    
    [OU, NASA, ABC time in 2026] = 0.24 x [Non-GB observation time in 2026]
    [SAAO time in 2026] = 0.28 x [Non-GB observation time in 2026]
    
- 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 1784:43:26 940:38:37 844:04:49 236:20:33 202:34:45 202:34:45 202:34:45 23:32:15
Observed 199:42:47
(11.19%)		 54:29:59
(5.79%)		 145:12:48
(17.20%)		 52:24:41
(22.18%)		 29:38:40
(14.63%)		 36:02:18
(17.79%)		 27:07:08
(13.39%)		 23:32:15
(N/A)
Remaining 1585:00:39
(88.81%)		 886:08:37
(94.21%)		 698:52:01
(82.80%)		 183:55:52
(77.82%)		 172:56:04
(85.37%)		 166:32:26
(82.21%)		 175:27:37
(86.61%)		 00:00:00
(N/A)











Camera status (2026/03/09)



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