PRIME Observation Log 2025/09/27

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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: 2025/09/27
Local observer:
Remote observer: Asahi, Togo
Weather: cloudy
Comment:
Detector Temperature: 116.00008 +- 0.00089 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:58:35
Morning 05:55:59
Science Observation
(Sun altitude < -10°)
Start 19:20:05
End 05:34:30
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:20:05
End 23:41:37


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:25:51 10:14:25 0.335
GB Time 00:00:00 04:21:32 0.000
Non-GB Time 03:25:51 05:52:53 0.583


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 280 00:13:20 00:24:51 0.537
SAAO 429 00:20:26 00:51:27 0.397
OU 429 00:20:26 00:51:27 0.397
NASA 429 00:20:26 00:51:27 0.397
ABC 429 00:20:26 00:51:27 0.397


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 1716 01:21:47 03:25:51 0.397
TWILIGHT 280 00:13:20 00:24:51 0.537


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field4400_test 24 00:01:08 00:14:53 0.077
field15409_test 16 00:00:45 00:08:19 0.092
field15409 40 00:01:54 00:04:09 0.458
field15410 40 00:01:54 00:04:22 0.435
field12327_test 36 00:01:42 00:11:15 0.152
field12327 40 00:01:54 00:03:52 0.491
field12328 40 00:01:54 00:04:01 0.474
field12329 40 00:01:54 00:04:11 0.455
field12330 40 00:01:54 00:04:07 0.462
field12331 40 00:01:54 00:04:05 0.465
field11416 40 00:01:54 00:04:16 0.446
field11417 40 00:01:54 00:04:04 0.469
field11418 40 00:01:54 00:04:06 0.463
field10823 40 00:01:54 00:03:58 0.480
field10525 40 00:01:54 00:04:09 0.458
field10526 40 00:01:54 00:04:09 0.458
field10527 40 00:01:54 00:03:52 0.491
field10528 40 00:01:54 00:04:00 0.476
field10529 40 00:01:54 00:04:07 0.462
field10829 40 00:01:54 00:04:09 0.458
field10830 40 00:01:54 00:03:58 0.480
field10831 40 00:01:54 00:04:09 0.458
field10832 40 00:01:54 00:04:01 0.474
field10833 40 00:01:54 00:04:01 0.474
field10834 40 00:01:54 00:04:01 0.474
field10835 40 00:01:54 00:04:09 0.458
field10836 40 00:01:54 00:04:09 0.458
field10837 40 00:01:54 00:04:06 0.463
field10838 40 00:01:54 00:04:01 0.474
field10839 40 00:01:54 00:04:12 0.453
field10541 40 00:01:54 00:04:18 0.443
field11744 40 00:01:54 00:04:06 0.463
field11439 40 00:01:54 00:04:15 0.448
field12358 40 00:01:54 00:04:09 0.458
field12357 40 00:01:54 00:04:08 0.460
field11743 40 00:01:54 00:05:34 0.342
field4705 40 00:01:54 00:04:06 0.463
field4482 40 00:01:54 00:04:01 0.474
field4051 40 00:01:54 00:04:15 0.448
field3843 40 00:01:54 00:04:09 0.458
field4050 40 00:01:54 00:04:04 0.469
field3842 40 00:01:54 00:04:01 0.474
field3841 40 00:01:54 00:04:17 0.445
field4049 40 00:01:54 00:05:15 0.363
FLAT OY 280 00:13:20 00:24:51 0.537










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 209:59:39 370:50:11 0.566
Jul 224:49:02 377:25:14 0.596
Aug 230:19:15 357:22:01 0.644
Sep 168:50:55 288:05:35 0.586

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 1973:19:15 1030:18:14 943:01:00 264:02:41 226:19:26 226:19:26 226:19:26 191:48:10
Observed 1555:42:04
(78.84%)		 971:37:54
(94.31%)		 584:04:10
(61.94%)		 139:04:51
(52.67%)		 129:57:38
(57.42%)		 220:25:12
(97.39%)		 94:36:27
(41.80%)		 191:48:10
(N/A)
Remaining 417:37:11
(21.16%)		 58:40:20
(5.69%)		 358:56:50
(38.06%)		 124:57:49
(47.33%)		 96:21:47
(42.58%)		 05:54:14
(2.61%)		 131:42:59
(58.20%)		 00:00:00
(N/A)











Camera status (2025/09/27)



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