PRIME Observation Log 2025/06/17

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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: 2025/06/17
Local observer: Ryusei Hamada, Takuto Tamaoki
Remote observer: None
Weather: Clear, Humid
Comment:
Detector Temperature: 114.00000 +- 0.00000 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:03:05
Morning 07:12:36
Science Observation
(Sun altitude < -10°)
Start 18:26:13
End 06:49:27
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:53:23
End 06:22:41


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:37:11 12:23:13 0.050
GB Time 00:06:57 11:29:17 0.010
Non-GB Time 00:30:13 00:53:56 0.560


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 124 00:05:54 00:19:43 0.300
GB 16 00:00:45 00:06:57 0.109
SAAO 46 00:02:11 00:07:33 0.290
OU 46 00:02:11 00:07:33 0.290
NASA 46 00:02:11 00:07:33 0.290
ABC 46 00:02:11 00:07:33 0.290


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 124 00:05:54 00:19:43 0.300
all_sky_grid 184 00:08:46 00:30:13 0.290
Bulge 16 00:00:45 00:06:57 0.109


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OY 4 00:00:11 00:01:04 0.177
FLAT OY 120 00:05:43 00:18:38 0.307
field7786_test 24 00:01:08 00:10:40 0.107
field7786 40 00:01:54 00:03:52 0.491
field8060 40 00:01:54 00:03:47 0.503
field8061 40 00:01:54 00:03:47 0.503
field8062 40 00:01:54 00:08:05 0.236
GB83_test OH 4 00:00:11 00:01:55 0.099
GB83_test OJ 12 00:00:34 00:05:02 0.113










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 137:29:35 209:52:32 0.655

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 1868:51:02 962:02:48 906:48:14 253:54:18 217:37:58 217:37:58 217:37:58 151:12:49
Observed 859:18:36
(45.98%)		 487:42:47
(50.70%)		 371:35:48
(40.98%)		 60:48:22
(23.95%)		 87:59:38
(40.43%)		 170:09:19
(78.18%)		 52:38:27
(24.19%)		 151:12:49
(N/A)
Remaining 1009:32:26
(54.02%)		 474:20:00
(49.30%)		 535:12:26
(59.02%)		 193:05:55
(76.05%)		 129:38:20
(59.57%)		 47:28:38
(21.82%)		 164:59:31
(75.81%)		 00:00:00
(N/A)











Camera status (2025/06/17)



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