PRIME Observation Log 2026/01/06

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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: 2026/01/06
Local observer:
Remote observer: DSuzuki
Weather: clear
Comment:
Detector Temperature: 119.50010 +- 0.00714 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:13:07
Morning 05:12:35
Science Observation
(Sun altitude < -10°)
Start 20:38:29
End 04:47:12
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 01:17:59 08:08:43 0.160
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 01:17:59 08:08:43 0.160


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 192 00:09:09 00:19:29 0.469
OU 192 00:09:09 00:19:29 0.469
NASA 192 00:09:09 00:19:29 0.469
ABC 192 00:09:09 00:19:29 0.469


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
offset_all_sky_grid 768 00:36:36 01:17:59 0.469


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
offset_field16165_test 8 00:00:22 00:03:19 0.115
offset_field16165 40 00:01:54 00:03:47 0.503
offset_field16166 40 00:01:54 00:04:01 0.474
offset_field16173 40 00:01:54 00:03:52 0.491
offset_field16174 40 00:01:54 00:03:50 0.497
offset_field16175 40 00:01:54 00:03:50 0.497
offset_field16176 40 00:01:54 00:03:58 0.480
offset_field12409 40 00:01:54 00:03:52 0.491
offset_field12410 40 00:01:54 00:03:50 0.497
offset_field12411 40 00:01:54 00:03:52 0.491
offset_field12412 40 00:01:54 00:03:52 0.491
offset_field12413 40 00:01:54 00:03:52 0.491
offset_field12414 40 00:01:54 00:03:52 0.491
offset_field12415 40 00:01:54 00:03:52 0.491
offset_field12416 40 00:01:54 00:03:50 0.497
offset_field12417 40 00:01:54 00:04:34 0.416
offset_field13009 40 00:01:54 00:03:55 0.485
offset_field13010 40 00:01:54 00:03:52 0.491
offset_field13011 40 00:01:54 00:03:52 0.491
offset_field13012 40 00:01:54 00:04:05 0.465










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 13:28:57 48:39:30 0.277

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 1878:03:13 945:31:27 932:31:45 261:06:29 223:48:25 223:48:25 223:48:25 00:46:51
Observed 13:28:57
(0.72%)		 00:00:00
(0.00%)		 13:28:57
(1.45%)		 03:22:14
(1.29%)		 03:22:14
(1.51%)		 03:22:14
(1.51%)		 03:22:14
(1.51%)		 00:46:51
(N/A)
Remaining 1864:34:16
(99.28%)		 945:31:27
(100.00%)		 919:02:48
(98.55%)		 257:44:15
(98.71%)		 220:26:11
(98.49%)		 220:26:11
(98.49%)		 220:26:11
(98.49%)		 00:00:00
(N/A)











Camera status (2026/01/06)



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