PRIME Observation Log 2026/01/11

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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: 2026/01/11
Local observer:
Remote observer: DSuzuki
Weather: clear
Comment:
Detector Temperature: 121.50129 +- 0.00770 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:12:45
Morning 05:17:06
Science Observation
(Sun altitude < -10°)
Start 20:37:52
End 04:51:59
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 03:37:06 08:14:07 0.439
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 03:37:06 08:14:07 0.439


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 48 00:02:17 00:08:19 0.275
NASA 1848 01:28:05 03:37:06 0.406


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 48 00:02:17 00:08:19 0.275
ToO 1848 01:28:05 03:37:06 0.406


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 48 00:02:17 00:08:19 0.275
field22242_test 48 00:02:17 00:10:14 0.223
field22242 40 00:01:54 00:04:01 0.474
field21659 40 00:01:54 00:04:04 0.469
field15164 40 00:01:54 00:05:39 0.337
field353 40 00:01:54 00:05:44 0.332
field22829 40 00:01:54 00:04:12 0.453
field8786 40 00:01:54 00:04:09 0.458
field15482 40 00:01:54 00:03:58 0.480
field20173 40 00:01:54 00:03:50 0.497
field21376 40 00:01:54 00:03:50 0.497
field20478 40 00:01:54 00:05:25 0.352
field5870 40 00:01:54 00:05:28 0.349
field20780 40 00:01:54 00:04:04 0.469
field12662 40 00:01:54 00:04:01 0.474
field19254 40 00:01:54 00:03:52 0.491
field18946 40 00:01:54 00:03:58 0.480
field13286 80 00:03:48 00:07:45 0.491
field15804 40 00:01:54 00:03:50 0.497
field16120 40 00:01:54 00:06:55 0.276
field1587 40 00:01:54 00:05:53 0.324
field18327 40 00:01:54 00:06:43 0.283
field3838 40 00:01:54 00:04:01 0.474
field972 40 00:01:54 00:05:50 0.326
field15809 40 00:01:54 00:05:47 0.329
field3839 40 00:01:54 00:05:47 0.329
field18017 40 00:01:54 00:03:55 0.485
field17076 40 00:01:54 00:05:50 0.326
field1592 40 00:01:54 00:05:53 0.324
field21981 40 00:01:54 00:05:14 0.364
field9088 40 00:01:54 00:04:09 0.458
field17406 40 00:01:54 00:03:58 0.480
field21995 40 00:01:54 00:03:50 0.497
field22862 40 00:01:54 00:04:06 0.463
field12694 40 00:01:54 00:04:04 0.469
field21112 40 00:01:54 00:03:55 0.485
field19291 40 00:01:54 00:03:50 0.497
field18672 40 00:01:54 00:05:16 0.361
field6367 40 00:01:54 00:05:42 0.334
field7991 40 00:01:54 00:04:23 0.434
field16793 40 00:01:54 00:04:04 0.469
field12399 40 00:01:54 00:03:52 0.491
field13024 40 00:01:54 00:03:50 0.497
field13961 40 00:01:54 00:03:52 0.491
field11786 40 00:01:54 00:03:55 0.485
field13957 40 00:01:54 00:04:08 0.460










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 32:22:44 89:38:48 0.361

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 1876:27:21 945:31:27 930:55:53 260:39:39 223:25:24 223:25:24 223:25:24 01:59:40
Observed 32:22:44
(1.73%)		 00:00:00
(0.00%)		 32:22:44
(3.48%)		 06:41:00
(2.56%)		 07:22:35
(3.30%)		 11:38:07
(5.21%)		 06:41:00
(2.99%)		 01:59:40
(N/A)
Remaining 1844:04:37
(98.27%)		 945:31:27
(100.00%)		 898:33:09
(96.52%)		 253:58:38
(97.44%)		 216:02:49
(96.70%)		 211:47:17
(94.79%)		 216:44:23
(97.01%)		 00:00:00
(N/A)











Camera status (2026/01/11)



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