PRIME Observation Log 2025/04/18

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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: 2025/04/18
Local observer: Seiya Nakayama
Remote observer:
Weather: clear
Comment:
Detector Temperature: 114.00007 +- 0.00202 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:34:00
Morning 06:38:15
Science Observation
(Sun altitude < -10°)
Start 18:55:31
End 06:16:42
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 22:49:17
End 06:16:42


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:25:32 11:21:10 1.006
GB Time 07:24:54 07:27:25 0.994
Non-GB Time 04:00:37 03:53:45 1.029


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 404 00:19:15 00:38:22 0.502
ALLSKY 636 00:30:18 01:12:27 0.418
NASA 2114 01:40:46 03:06:16 0.541
GB 4336 03:26:40 07:24:54 0.465
SAAO 159 00:07:34 00:18:06 0.418
OU 159 00:07:34 00:18:06 0.418
ABC 159 00:07:34 00:18:06 0.418


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 404 00:19:15 00:38:22 0.502
all_sky_grid 636 00:30:18 01:12:27 0.418
ToO 1955 01:33:11 02:48:09 0.554
Bulge 4264 03:23:15 07:16:05 0.466
SKY 72 00:03:25 00:08:49 0.389


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 4 00:00:11 00:00:41 0.276
FLAT_test OY 24 00:01:08 00:05:01 0.227
FLAT OY 376 00:17:55 00:32:38 0.549
field10913_test 20 00:00:57 00:06:56 0.137
field10913 40 00:01:54 00:03:50 0.497
field10914 40 00:01:54 00:03:50 0.497
field10915 40 00:01:54 00:03:47 0.503
field10916 40 00:01:54 00:03:47 0.503
field10917 40 00:01:54 00:03:47 0.503
field10918 40 00:01:54 00:03:47 0.503
field10919 40 00:01:54 00:03:47 0.503
field10920 40 00:01:54 00:03:47 0.503
field10921 40 00:01:54 00:03:47 0.503
field10922 40 00:01:54 00:03:47 0.503
field10923 40 00:01:54 00:08:55 0.214
field19009_test 355 00:16:55 00:42:05 0.402
field19009 400 00:19:04 00:31:16 0.610
field19010 400 00:19:04 00:30:53 0.617
field18698 400 00:19:04 00:30:56 0.616
field19319 400 00:19:04 00:32:57 0.579
field3150_test 16 00:00:45 00:02:57 0.257
field3150 40 00:01:54 00:03:50 0.497
field3151 40 00:01:54 00:03:52 0.491
field3537 40 00:01:54 00:03:47 0.503
field3538 40 00:01:54 00:04:09 0.458
GB63_dither_test OJ 48 00:02:17 00:08:08 0.281
GB63_dither OJ 48 00:02:17 00:04:32 0.503
GB62_dither OJ 48 00:02:17 00:04:38 0.493
GB60_dither OJ 48 00:02:17 00:04:32 0.503
GB61_dither OJ 48 00:02:17 00:04:35 0.498
GB59_dither OJ 48 00:02:17 00:04:38 0.493
GB58_dither OJ 48 00:02:17 00:04:35 0.498
GB57_dither OJ 48 00:02:17 00:04:32 0.503
GB74_dither OJ 48 00:02:17 00:04:35 0.498
GB75_dither OJ 48 00:02:17 00:04:35 0.498
GB76_dither OJ 48 00:02:17 00:04:32 0.503
GB77_dither OJ 48 00:02:17 00:04:35 0.498
GB78_dither OJ 48 00:02:17 00:04:38 0.493
GB79_dither OJ 48 00:02:17 00:04:35 0.498
GB80_dither OJ 48 00:02:17 00:04:32 0.503
GB97_dither OJ 48 00:02:17 00:04:32 0.503
GB96_dither OJ 48 00:02:17 00:04:38 0.493
GB95_dither OJ 48 00:02:17 00:04:35 0.498
GB94_dither OJ 48 00:02:17 00:04:35 0.498
GB93_dither OJ 48 00:02:17 00:04:32 0.503
GB92_dither OJ 48 00:02:17 00:04:38 0.493
GB91_dither OJ 48 00:02:17 00:04:35 0.498
GB108_dither OJ 48 00:02:17 00:04:35 0.498
GB109_dither OJ 48 00:02:17 00:04:35 0.498
GB110_dither OJ 48 00:02:17 00:04:32 0.503
GB111_dither OJ 48 00:02:17 00:04:32 0.503
GB112_dither OJ 48 00:02:17 00:04:35 0.498
GB113_dither OJ 48 00:02:17 00:04:38 0.493
GB114_dither OJ 48 00:02:17 00:04:32 0.503
GB131_dither OJ 48 00:02:17 00:04:35 0.498
GB130_dither OJ 48 00:02:17 00:04:38 0.493
GB129_dither OJ 48 00:02:17 00:04:35 0.498
GB128_dither OJ 48 00:02:17 00:04:32 0.503
GB127_dither OJ 48 00:02:17 00:04:38 0.493
GB126_dither OJ 48 00:02:17 00:04:32 0.503
GB125_dither OJ 48 00:02:17 00:04:49 0.474
GCsky 72 00:03:25 00:08:49 0.389
GB63_dither_test OH 64 00:03:03 00:08:54 0.342
GB63_dither OH 72 00:03:25 00:07:03 0.487
GB62_dither OH 72 00:03:25 00:07:00 0.490
GB61_dither OH 72 00:03:25 00:07:05 0.483
GB60_dither OH 72 00:03:25 00:07:00 0.490
GB59_dither OH 72 00:03:25 00:07:05 0.484
GB58_dither OH 72 00:03:25 00:07:08 0.480
GB57_dither OH 72 00:03:25 00:07:05 0.484
GB74_dither OH 72 00:03:25 00:07:05 0.484
GB75_dither OH 72 00:03:25 00:07:11 0.477
GB76_dither OH 72 00:03:25 00:07:08 0.480
GB77_dither OH 72 00:03:25 00:07:08 0.480
GB78_dither OH 72 00:03:25 00:07:05 0.484
GB79_dither OH 72 00:03:25 00:07:14 0.474
GB80_dither OH 72 00:03:25 00:07:05 0.484
GB97_dither OH 72 00:03:25 00:07:03 0.487
GB96_dither OH 72 00:03:25 00:07:05 0.484
GB95_dither OH 72 00:03:25 00:07:08 0.480
GB94_dither OH 72 00:03:25 00:07:05 0.484
GB93_dither OH 72 00:03:25 00:07:03 0.487
GB92_dither OH 72 00:03:25 00:07:00 0.490
GB91_dither OH 72 00:03:25 00:07:00 0.490
GB108_dither OH 72 00:03:25 00:07:08 0.480
GB109_dither OH 72 00:03:25 00:07:03 0.487
GB110_dither OH 72 00:03:25 00:07:05 0.484
GB111_dither OH 72 00:03:25 00:07:05 0.484
GB112_dither OH 72 00:03:25 00:07:03 0.487
GB113_dither OH 72 00:03:25 00:07:33 0.454
GB114_dither OH 72 00:03:25 00:08:10 0.420
GB131_dither OH 72 00:03:25 00:07:28 0.459
GB130_dither OH 72 00:03:25 00:08:49 0.389
GB129_dither OH 72 00:03:25 00:15:24 0.223
GB128_dither OH 72 00:03:25 00:07:11 0.477
GB127_dither OH 72 00:03:25 00:09:26 0.364
GB126_dither OH 48 00:02:17 00:04:43 0.484
GB125_dither OH 48 00:02:17 00:05:03 0.452










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 94:01:53 199:46:01 0.471

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 1780:25:55 905:06:30 875:19:24 245:05:26 210:04:39 210:04:39 210:04:39 117:52:28
Observed 410:29:51
(23.06%)		 138:45:35
(15.33%)		 271:44:16
(31.04%)		 36:03:07
(14.71%)		 65:54:56
(31.38%)		 137:35:39
(65.50%)		 32:10:33
(15.32%)		 117:52:28
(N/A)
Remaining 1369:56:03
(76.94%)		 766:20:55
(84.67%)		 603:35:08
(68.96%)		 209:02:18
(85.29%)		 144:09:42
(68.62%)		 72:29:00
(34.50%)		 177:54:06
(84.68%)		 00:00:00
(N/A)











Camera status (2025/04/18)