PRIME Observation Log 2026/01/05

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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: 2026/01/05
Local observer:
Remote observer: Ryusei
Weather:
Comment:
Detector Temperature: 119.23354 +- 0.28683 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:13:05
Morning 05:11:44
Science Observation
(Sun altitude < -10°)
Start 20:38:31
End 04:46:18
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start --:--:--
End --:--:--


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:13:18 08:07:47 0.396
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 03:13:18 08:07:47 0.396


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.)
SAAO 483 00:23:01 00:48:19 0.476
OU 483 00:23:01 00:48:19 0.476
NASA 483 00:23:01 00:48:19 0.476
ABC 483 00:23:01 00:48:19 0.476


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
offset_all_sky_grid 1488 01:10:55 02:30:37 0.471
all_sky_grid 444 00:21:09 00:42:40 0.496


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
offset_field13015_test 8 00:00:22 00:05:56 0.064
offset_field13015 40 00:01:54 00:03:52 0.491
offset_field13016 40 00:01:54 00:03:52 0.491
offset_field13017 40 00:01:54 00:04:09 0.458
offset_field13027 40 00:01:54 00:03:55 0.485
offset_field13032 40 00:01:54 00:03:52 0.491
offset_field13033 40 00:01:54 00:04:01 0.474
offset_field13652 40 00:01:54 00:03:47 0.503
offset_field13653 40 00:01:54 00:03:50 0.497
offset_field13654 40 00:01:54 00:03:50 0.497
offset_field13655 40 00:01:54 00:03:52 0.491
offset_field13656 40 00:01:54 00:03:52 0.491
offset_field13657 40 00:01:54 00:03:55 0.485
offset_field13658 40 00:01:54 00:04:12 0.453
offset_field14271 40 00:01:54 00:03:58 0.480
offset_field14272 40 00:01:54 00:03:50 0.497
offset_field14273 40 00:01:54 00:03:50 0.497
offset_field14274 40 00:01:54 00:03:52 0.491
offset_field14275 40 00:01:54 00:03:50 0.497
offset_field14276 40 00:01:54 00:03:47 0.503
offset_field14277 40 00:01:54 00:03:50 0.497
offset_field14278 40 00:01:54 00:03:50 0.497
offset_field14279 40 00:01:54 00:03:52 0.491
offset_field14280 40 00:01:54 00:03:52 0.491
offset_field14281 40 00:01:54 00:03:52 0.491
offset_field14282 40 00:01:54 00:03:52 0.491
offset_field14283 40 00:01:54 00:03:50 0.497
offset_field14284 40 00:01:54 00:03:47 0.503
offset_field14285 40 00:01:54 00:03:50 0.497
offset_field14286 40 00:01:54 00:03:55 0.485
offset_field14598 40 00:01:54 00:03:52 0.491
offset_field14599 40 00:01:54 00:03:50 0.497
offset_field14600 40 00:01:54 00:03:52 0.491
offset_field15228 40 00:01:54 00:03:52 0.491
offset_field15229 40 00:01:54 00:03:52 0.491
offset_field15230 40 00:01:54 00:03:55 0.485
offset_field12418 40 00:01:54 00:03:55 0.485
offset_field12419 40 00:01:54 00:04:37 0.412
field14951 40 00:01:54 00:03:52 0.491
field14952 40 00:01:54 00:03:50 0.497
field14953 40 00:01:54 00:03:50 0.497
field14954 40 00:01:54 00:03:47 0.503
field14955 40 00:01:54 00:03:47 0.503
field14956 40 00:01:54 00:03:47 0.503
field14957 40 00:01:54 00:03:47 0.503
field14958 40 00:01:54 00:03:47 0.503
field14959 40 00:01:54 00:03:50 0.497
field14960 40 00:01:54 00:03:47 0.503
field14961 40 00:01:54 00:03:52 0.491
field14962 4 00:00:11 00:00:41 0.276










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 03:13:18 40:30:47 0.080

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 1871:51:56 945:31:27 926:20:28 259:22:31 222:19:18 222:19:18 222:19:18 00:00:00
Observed 03:13:18
(0.17%)		 00:00:00
(0.00%)		 03:13:18
(0.35%)		 00:48:19
(0.31%)		 00:48:19
(0.36%)		 00:48:19
(0.36%)		 00:48:19
(0.36%)		 00:00:00
(N/A)
Remaining 1868:38:38
(99.83%)		 945:31:27
(100.00%)		 923:07:10
(99.65%)		 258:34:12
(99.69%)		 221:30:59
(99.64%)		 221:30:59
(99.64%)		 221:30:59
(99.64%)		 00:00:00
(N/A)











Camera status (2026/01/05)



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