PRIME Observation Log 2026/02/27

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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: 2026/02/27
Local observer:
Remote observer: Takuto, Ryusei
Weather: clear
Comment:
Detector Temperature: 111.99993 +- 0.00222 K
ImageAcquisitionErrors occurred 1 times @
2026-02-27 23:10:22 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:36:46
Morning 06:02:20
Science Observation
(Sun altitude < -10°)
Start 19:58:48
End 05:40:18
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 02:06:51
End 05:40:18


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 08:37:19 09:41:30 0.890
GB Time 03:38:16 03:33:27 1.023
Non-GB Time 04:59:02 06:08:03 0.813


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 328 00:15:38 00:37:15 0.420
NASA 983 00:46:51 01:52:43 0.416
GB 2060 01:38:11 03:38:16 0.450
SAAO 575 00:27:24 01:02:06 0.441
OU 575 00:27:24 01:02:06 0.441
ABC 575 00:27:24 01:02:06 0.441


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 328 00:15:38 00:37:15 0.420
ToO 408 00:19:26 00:50:37 0.384
all_sky_grid 2300 01:49:38 04:08:25 0.441
Bulge 1964 01:33:37 03:26:45 0.453
SKY 96 00:04:34 00:11:31 0.397


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OY 8 00:00:22 00:07:09 0.053
FLAT OY 320 00:15:15 00:30:06 0.507
no_grid_test 20 00:00:57 00:11:53 0.080
no_grid 388 00:18:29 00:38:44 0.477
field15827_test 12 00:00:34 00:03:36 0.158
field15827 60 00:02:51 00:06:00 0.476
field15828 60 00:02:51 00:06:00 0.476
field15829 60 00:02:51 00:06:17 0.455
field15830 60 00:02:51 00:06:20 0.451
field15831 60 00:02:51 00:05:43 0.499
field15832 60 00:02:51 00:06:17 0.455
field15833 60 00:02:51 00:05:43 0.499
field15834 60 00:02:51 00:05:57 0.480
field15835 60 00:02:51 00:05:40 0.503
field15836 60 00:02:51 00:06:03 0.472
field15515 60 00:02:51 00:06:11 0.462
field15516 60 00:02:51 00:06:00 0.476
field15517 60 00:02:51 00:05:57 0.480
field15518 60 00:02:51 00:06:13 0.459
field15519 60 00:02:51 00:05:57 0.480
field15520 60 00:02:51 00:06:39 0.429
field6666 60 00:02:51 00:06:36 0.432
field6667 60 00:02:51 00:06:14 0.458
field6668 60 00:02:51 00:05:46 0.495
field6669 60 00:02:51 00:06:14 0.458
field6405 60 00:02:51 00:05:57 0.480
field6406 60 00:02:51 00:06:25 0.445
field6407 60 00:02:51 00:06:28 0.441
field6408 60 00:02:51 00:06:22 0.448
field6409 60 00:02:51 00:06:22 0.448
field6410 60 00:02:51 00:05:40 0.503
field6411 60 00:02:51 00:06:06 0.469
field6412 60 00:02:51 00:05:43 0.499
field6413 60 00:02:51 00:05:40 0.503
field6414 60 00:02:51 00:05:54 0.484
field4730 60 00:02:51 00:05:43 0.499
field4731 60 00:02:51 00:05:43 0.499
field4732 60 00:02:51 00:05:43 0.499
field4733 60 00:02:51 00:09:16 0.308
field9504_test 4 00:00:11 00:08:36 0.022
field4734_test 4 00:00:11 00:01:41 0.113
field4734 60 00:02:51 00:05:43 0.499
field4735 60 00:02:51 00:05:43 0.499
field4736 60 00:02:51 00:05:43 0.499
field4737 60 00:02:51 00:08:09 0.351
GB83_test OJ 20 00:00:57 00:08:26 0.113
GB83_dither OJ 48 00:02:17 00:04:35 0.498
GB100_dither OJ 48 00:02:17 00:04:32 0.503
GB117_dither OJ 48 00:02:17 00:04:35 0.498
GB116_dither OJ 48 00:02:17 00:04:35 0.498
GB99_dither OJ 48 00:02:17 00:04:32 0.503
GB82_dither OJ 48 00:02:17 00:04:35 0.498
GB81_dither OJ 48 00:02:17 00:04:35 0.498
GB98_dither OJ 48 00:02:17 00:04:38 0.493
GB115_dither OJ 48 00:02:17 00:05:03 0.452
GCsky 96 00:04:34 00:11:31 0.397
GB60_dither OJ 48 00:02:17 00:04:49 0.474
GB80_dither OJ 48 00:02:17 00:04:32 0.503
GB79_dither OJ 48 00:02:17 00:05:03 0.452
GB78_dither OJ 48 00:02:17 00:05:17 0.432
GB77_dither OJ 48 00:02:17 00:04:38 0.493
GB76_dither OJ 48 00:02:17 00:04:38 0.493
GB75_dither OJ 48 00:02:17 00:04:35 0.498
GB74_dither OJ 48 00:02:17 00:04:41 0.488
GB97_dither OJ 48 00:02:17 00:04:35 0.498
GB96_dither OJ 48 00:02:17 00:04:38 0.493
GB95_dither OJ 48 00:02:17 00:04:38 0.493
GB94_dither OJ 48 00:02:17 00:09:24 0.243
GB60_dither OH 24 00:01:08 00:02:19 0.493
GB74_dither OH 24 00:01:08 00:02:16 0.503
GB75_dither OH 48 00:02:17 00:04:46 0.479
GB76_dither OH 72 00:03:25 00:06:54 0.497
GB77_dither OH 72 00:03:25 00:07:03 0.487
GB78_dither OH 72 00:03:25 00:07:03 0.487
GB79_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:24 0.474
GB97_dither OH 24 00:01:08 00:02:19 0.493
GB96_dither OH 24 00:01:08 00:02:21 0.484
GB95_dither OH 24 00:01:08 00:02:19 0.493
GB94_dither OH 72 00:03:25 00:07:00 0.490
GB93_dither OH 48 00:02:17 00:04:46 0.479
GB92_dither OH 48 00:02:17 00:04:41 0.488
GB91_dither OH 24 00:01:08 00:02:24 0.474
GB108_dither OH 24 00:01:08 00:02:19 0.493
GB109_dither OH 48 00:02:17 00:04:41 0.488
GB110_dither OH 72 00:03:25 00:07:03 0.487
GB111_dither OH 72 00:03:25 00:07:03 0.487
GB112_dither OH 48 00:02:17 00:07:54 0.289
GB113_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 24 00:01:08 00:02:38 0.432










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 99:19:50 249:22:41 0.398

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 1789:41:36 935:56:21 853:45:15 239:03:04 204:54:03 204:54:03 204:54:03 21:06:57
Observed 155:14:53
(8.67%)		 29:48:54
(3.19%)		 125:25:58
(14.69%)		 33:48:50
(14.15%)		 29:15:01
(14.28%)		 35:38:39
(17.40%)		 26:43:28
(13.04%)		 21:06:57
(N/A)
Remaining 1634:26:43
(91.33%)		 906:07:26
(96.81%)		 728:19:16
(85.31%)		 205:14:13
(85.85%)		 175:39:02
(85.72%)		 169:15:24
(82.60%)		 178:10:35
(86.96%)		 00:00:00
(N/A)











Camera status (2026/02/27)



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