PRIME Observation Log 2026/02/25

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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: 2026/02/25
Local observer:
Remote observer: takuto ,ose
Weather: clear
Comment:
Detector Temperature: 111.99974 +- 0.00200 K
ImageAcquisitionErrors occurred 1 times @
2026-02-25 20:35:03 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:39:09
Morning 06:00:39
Science Observation
(Sun altitude < -10°)
Start 20:01:17
End 05:38:31
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 02:14:43
End 05:38:31


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 09:46:01 09:37:13 1.015
GB Time 03:34:21 03:23:47 1.052
Non-GB Time 06:11:39 06:13:26 0.995


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 288 00:13:43 00:45:28 0.302
GB 1876 01:29:25 03:34:21 0.417
SAAO 860 00:40:59 01:32:54 0.441
OU 860 00:40:59 01:32:54 0.441
NASA 860 00:40:59 01:32:54 0.441
ABC 860 00:40:59 01:32:54 0.441


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 288 00:13:43 00:45:28 0.302
all_sky_grid 3440 02:43:58 06:11:39 0.441
Bulge 1804 01:25:59 03:13:37 0.444
SKY 72 00:03:25 00:20:44 0.165


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OJ 8 00:00:22 00:08:05 0.047
FLAT OJ 280 00:13:20 00:37:23 0.357
field18964_test 32 00:01:31 00:21:06 0.072
field18964 60 00:02:51 00:07:17 0.392
field18965 104 00:04:57 00:15:37 0.317
field18966 60 00:02:51 00:05:40 0.503
field18967 60 00:02:51 00:05:46 0.495
field18654 60 00:02:51 00:05:40 0.503
field18655 60 00:02:51 00:05:46 0.495
field18656 60 00:02:51 00:05:46 0.495
field18657 60 00:02:51 00:05:52 0.487
field18658 60 00:02:51 00:05:43 0.499
field18659 60 00:02:51 00:05:40 0.503
field18660 60 00:02:51 00:05:49 0.491
field17717 60 00:02:51 00:05:43 0.499
field17718 60 00:02:51 00:05:40 0.503
field17719 60 00:02:51 00:05:43 0.499
field17720 60 00:02:51 00:05:40 0.503
field17721 60 00:02:51 00:05:46 0.495
field17722 60 00:02:51 00:05:49 0.491
field17723 60 00:02:51 00:05:49 0.491
field17724 60 00:02:51 00:05:46 0.495
field17725 60 00:02:51 00:05:40 0.503
field17726 60 00:02:51 00:05:49 0.491
field17404 60 00:02:51 00:05:40 0.503
field17405 60 00:02:51 00:05:46 0.495
field17406 60 00:02:51 00:05:46 0.495
field17407 60 00:02:51 00:05:43 0.499
field17408 60 00:02:51 00:05:43 0.499
field17409 60 00:02:51 00:05:40 0.503
field17410 60 00:02:51 00:05:40 0.503
field17411 60 00:02:51 00:05:40 0.503
field17412 60 00:02:51 00:05:52 0.487
field17088 60 00:02:51 00:05:40 0.503
field17089 60 00:02:51 00:05:40 0.503
field17090 60 00:02:51 00:05:40 0.503
field17091 60 00:02:51 00:05:46 0.495
field17092 60 00:02:51 00:05:43 0.499
field17093 60 00:02:51 00:05:43 0.499
field17094 60 00:02:51 00:05:43 0.499
field17095 60 00:02:51 00:05:40 0.503
field17096 60 00:02:51 00:05:40 0.503
field17097 60 00:02:51 00:08:43 0.328
field8265 60 00:02:51 00:05:43 0.499
field8266 60 00:02:51 00:05:43 0.499
field8267 104 00:04:57 00:12:53 0.385
field8267_test 20 00:00:57 00:06:31 0.146
field8268 60 00:02:51 00:05:43 0.499
field8269 60 00:02:51 00:05:43 0.499
field8270 60 00:02:51 00:05:43 0.499
field8271 60 00:02:51 00:05:40 0.503
field8272 60 00:02:51 00:07:30 0.381
field7450 60 00:02:51 00:05:40 0.503
field7451 60 00:02:51 00:05:40 0.503
field7452 60 00:02:51 00:05:43 0.499
field7453 60 00:02:51 00:05:43 0.499
field7454 60 00:02:51 00:05:43 0.499
field7455 60 00:02:51 00:05:43 0.499
field7456 60 00:02:51 00:11:08 0.257
GB83_test OJ 4 00:00:11 00:01:58 0.097
GB83_dither OJ 48 00:02:17 00:04:38 0.493
GB82_dither OJ 48 00:02:17 00:04:38 0.493
GB100_dither OJ 48 00:02:17 00:04:35 0.498
GB117_dither OJ 48 00:02:17 00:04:38 0.493
GB99_dither OJ 48 00:02:17 00:04:38 0.493
GB116_dither OJ 48 00:02:17 00:04:38 0.493
GB115_dither OJ 48 00:02:17 00:04:35 0.498
GB98_dither OJ 48 00:02:17 00:04:38 0.493
GB81_dither OJ 48 00:02:17 00:05:20 0.429
GB80_dither OJ 48 00:02:17 00:04:41 0.488
GB79_dither OJ 48 00:02:17 00:04:35 0.498
GB78_dither OJ 48 00:02:17 00:04:41 0.488
GB60_dither OJ 48 00:02:17 00:04:35 0.498
GB77_dither OJ 48 00:02:17 00:04:35 0.498
GB76_dither OJ 48 00:02:17 00:04:43 0.484
GB75_dither OJ 48 00:02:17 00:04:35 0.498
GB74_dither OJ 48 00:02:17 00:04:43 0.484
GCsky 72 00:03:25 00:20:44 0.165
GB60_dither OH 48 00:02:17 00:04:42 0.486
GB74_dither OH 72 00:03:25 00:07:00 0.490
GB75_dither OH 48 00:02:17 00:04:46 0.479
GB76_dither OH 48 00:02:17 00:04:38 0.493
GB77_dither OH 48 00:02:17 00:04:41 0.488
GB78_dither OH 48 00:02:17 00:04:41 0.488
GB79_dither OH 48 00:02:17 00:04:43 0.484
GB80_dither OH 72 00:03:25 00:07:04 0.485
GB97_dither OH 72 00:03:25 00:07:00 0.490
GB96_dither OH 72 00:03:25 00:07:03 0.487
GB95_dither OH 48 00:02:17 00:04:38 0.493
GB94_dither OH 48 00:02:17 00:13:47 0.166
GB93_dither OH 24 00:01:08 00:02:19 0.493
GB92_dither OH 24 00:01:08 00:02:19 0.493
GB91_dither OH 48 00:02:17 00:04:35 0.498
GB108_dither OH 48 00:02:17 00:04:43 0.484
GB109_dither OH 24 00:01:08 00:02:16 0.503
GB110_dither OH 24 00:01:08 00:02:21 0.484
GB111_dither OH 24 00:01:08 00:02:19 0.493
GB112_dither OH 24 00:01:08 00:02:19 0.493
GB113_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 48 00:02:17 00:11:41 0.196










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 55:55:01 259:31:55 0.215
Feb 81:58:14 230:01:49 0.356

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 1782:00:27 932:10:04 849:50:22 237:57:18 203:57:41 203:57:41 203:57:41 20:08:51
Observed 137:53:18
(7.74%)		 22:31:35
(2.42%)		 115:21:42
(13.57%)		 31:30:36
(13.24%)		 26:56:46
(13.21%)		 32:29:05
(15.93%)		 24:25:14
(11.97%)		 20:08:51
(N/A)
Remaining 1644:07:09
(92.26%)		 909:38:29
(97.58%)		 734:28:40
(86.43%)		 206:26:42
(86.76%)		 177:00:54
(86.79%)		 171:28:35
(84.07%)		 179:32:27
(88.03%)		 00:00:00
(N/A)











Camera status (2026/02/25)



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