PRIME Observation Log 2025/09/23

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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: 2025/09/23
Local observer:
Remote observer: Ryusei
Weather: cloudy
Comment:
Detector Temperature: 116.00008 +- 0.00765 K
ImageAcquisitionErrors occurred 6 times @
2025-09-23 23:24:49 SAT
2025-09-24 02:19:37 SAT
2025-09-24 02:25:50 SAT
2025-09-24 02:31:41 SAT
2025-09-24 04:29:55 SAT
2025-09-24 04:57:36 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:55:57
Morning 06:01:21
Science Observation
(Sun altitude < -10°)
Start 19:17:22
End 05:39:57
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:17:22
End 23:57:21


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 01:12:48 10:22:34 0.117
GB Time 01:12:48 04:39:58 0.260
Non-GB Time 00:00:00 05:42:36 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 2765 02:11:47 03:16:12 0.672
GB 548 00:26:07 01:12:48 0.359


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 4 00:00:11 00:00:41 0.276
SKY 68 00:03:14 00:21:28 0.151
Bulge 480 00:22:52 00:51:19 0.446
calibration 2761 02:11:36 03:15:31 0.673


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test ZO 4 00:00:11 00:00:41 0.276
GCsky_test 16 00:00:45 00:15:14 0.050
GCsky 52 00:02:28 00:06:13 0.398
GB60_dither OJ 48 00:02:17 00:05:14 0.436
GB80_dither OJ 48 00:02:17 00:05:42 0.400
GB79_dither OJ 48 00:02:17 00:04:52 0.470
GB78_dither OJ 48 00:02:17 00:04:35 0.498
GB77_dither OJ 48 00:02:17 00:05:09 0.444
GB76_dither OJ 48 00:02:17 00:05:25 0.421
GB75_dither OJ 48 00:02:17 00:05:12 0.440
GB74_dither OJ 48 00:02:17 00:05:06 0.448
GB91_dither OJ 48 00:02:17 00:04:38 0.493
GB92_dither OJ 48 00:02:17 00:05:22 0.426
reset 40 00:01:54 00:08:24 0.227
superbias 480 00:22:52 00:45:28 0.503
test 124 00:05:54 00:12:51 0.460
Dark 529 00:25:12 00:32:04 0.786
new_setting 220 00:10:29 00:11:25 0.918
new_settings 1368 01:05:12 01:25:17 0.765










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 147:12:15 246:55:37 0.596

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 1972:15:34 1028:16:01 943:59:33 264:19:04 226:33:29 226:33:29 226:33:29 190:02:29
Observed 1534:03:24
(77.78%)		 960:38:45
(93.42%)		 573:24:39
(60.74%)		 136:24:58
(51.61%)		 127:17:45
(56.19%)		 217:45:19
(96.11%)		 91:56:34
(40.58%)		 190:02:29
(N/A)
Remaining 438:12:10
(22.22%)		 67:37:16
(6.58%)		 370:34:53
(39.26%)		 127:54:05
(48.39%)		 99:15:43
(43.81%)		 08:48:09
(3.89%)		 134:36:54
(59.42%)		 00:00:00
(N/A)











Camera status (2025/09/23)



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