PRIME Observation Log 2025/04/25

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Observation Log (Time is in UT)

Date: 2025/04/25
Local observer: Seiya Nakayama
Remote observer:
Weather: clear
Comment:
Detector Temperature: 114.00010 +- 0.00134 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:26:39
Morning 06:42:55
Science Observation
(Sun altitude < -10°)
Start 18:48:22
End 06:21:10
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 22:21:45
End 06:21:10


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:36:38 11:32:48 1.006
GB Time 07:58:35 07:59:24 0.998
Non-GB Time 03:38:02 03:33:23 1.022


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 504 00:24:01 00:46:00 0.522
ALLSKY 2248 01:47:09 03:38:02 0.491
GB 4772 03:47:27 07:58:35 0.475
SAAO 562 00:26:47 00:54:30 0.491
OU 562 00:26:47 00:54:30 0.491
NASA 562 00:26:47 00:54:30 0.491
ABC 562 00:26:47 00:54:30 0.491


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 504 00:24:01 00:46:00 0.522
all_sky_grid 2248 01:47:09 03:38:02 0.491
Bulge 4676 03:42:53 07:47:12 0.477
SKY 96 00:04:34 00:11:22 0.402


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 40 00:01:54 00:05:36 0.340
FLAT OY 460 00:21:55 00:39:42 0.552
field9159_test 36 00:01:42 00:06:01 0.285
field9159 40 00:01:54 00:03:47 0.503
field9160 40 00:01:54 00:03:47 0.503
field9161 40 00:01:54 00:03:47 0.503
field9162 40 00:01:54 00:03:47 0.503
field9163 40 00:01:54 00:03:47 0.503
field9164 40 00:01:54 00:03:47 0.503
field9165 40 00:01:54 00:03:47 0.503
field9166 40 00:01:54 00:03:47 0.503
field9167 40 00:01:54 00:03:47 0.503
field9168 40 00:01:54 00:03:52 0.491
field9169 40 00:01:54 00:03:52 0.491
field9170 40 00:01:54 00:03:52 0.491
field9171 40 00:01:54 00:03:52 0.491
field9172 40 00:01:54 00:03:52 0.491
field9173 40 00:01:54 00:03:50 0.497
field9174 40 00:01:54 00:03:50 0.497
field9175 40 00:01:54 00:03:47 0.503
field9176 40 00:01:54 00:03:47 0.503
field9177 40 00:01:54 00:03:47 0.503
field9178 40 00:01:54 00:03:47 0.503
field9179 40 00:01:54 00:03:47 0.503
field9180 40 00:01:54 00:03:47 0.503
field9181 40 00:01:54 00:03:47 0.503
field9182 40 00:01:54 00:03:47 0.503
field9183 40 00:01:54 00:03:47 0.503
field9184 40 00:01:54 00:03:47 0.503
field9185 40 00:01:54 00:03:47 0.503
field9186 40 00:01:54 00:03:47 0.503
field9187 40 00:01:54 00:03:47 0.503
field9188 40 00:01:54 00:03:47 0.503
field9189 40 00:01:54 00:03:47 0.503
field9190 40 00:01:54 00:03:50 0.497
field9191 40 00:01:54 00:03:52 0.491
field9192 40 00:01:54 00:03:52 0.491
field9193 40 00:01:54 00:03:50 0.497
field9194 40 00:01:54 00:03:50 0.497
field9195 40 00:01:54 00:03:47 0.503
field9196 40 00:01:54 00:04:09 0.458
field7807_test 12 00:00:34 00:01:27 0.391
field7807 40 00:01:54 00:03:50 0.497
field8076 40 00:01:54 00:03:47 0.503
field8077 40 00:01:54 00:03:47 0.503
field8078 40 00:01:54 00:03:47 0.503
field8079 40 00:01:54 00:03:47 0.503
field8080 40 00:01:54 00:03:47 0.503
field8081 40 00:01:54 00:03:50 0.497
field8353 40 00:01:54 00:03:47 0.503
field8354 40 00:01:54 00:03:50 0.497
field8355 40 00:01:54 00:03:50 0.497
field8356 40 00:01:54 00:03:50 0.497
field8357 40 00:01:54 00:03:52 0.491
field8632 40 00:01:54 00:03:47 0.503
field8633 40 00:01:54 00:03:47 0.503
field8634 40 00:01:54 00:03:47 0.503
field8635 40 00:01:54 00:03:47 0.503
field8636 40 00:01:54 00:04:26 0.429
GB63_dither_test OY 48 00:02:17 00:09:21 0.245
GB63_dither OY 48 00:02:17 00:04:49 0.474
GB62_dither OY 48 00:02:17 00:05:17 0.432
GB61_dither OY 48 00:02:17 00:04:55 0.465
GB60_dither OY 48 00:02:17 00:04:35 0.498
GB59_dither OY 48 00:02:17 00:04:38 0.493
GB58_dither OY 48 00:02:17 00:04:35 0.498
GB57_dither OY 48 00:02:17 00:04:32 0.503
GB74_dither OY 48 00:02:17 00:04:35 0.498
GB75_dither OY 48 00:02:17 00:04:35 0.498
GB76_dither OY 48 00:02:17 00:04:35 0.498
GB77_dither OY 48 00:02:17 00:04:35 0.498
GB78_dither OY 48 00:02:17 00:04:35 0.498
GB79_dither OY 48 00:02:17 00:04:35 0.498
GB80_dither OY 48 00:02:17 00:04:32 0.503
GB97_dither OY 48 00:02:17 00:04:32 0.503
GB96_dither OY 48 00:02:17 00:04:38 0.493
GB95_dither OY 48 00:02:17 00:04:35 0.498
GB94_dither OY 48 00:02:17 00:04:35 0.498
GB93_dither OY 48 00:02:17 00:04:35 0.498
GB92_dither OY 48 00:02:17 00:04:38 0.493
GB91_dither OY 48 00:02:17 00:04:38 0.493
GB108_dither OY 48 00:02:17 00:04:38 0.493
GB109_dither OY 48 00:02:17 00:04:32 0.503
GB110_dither OY 48 00:02:17 00:04:32 0.503
GB111_dither OY 48 00:02:17 00:04:35 0.498
GB112_dither OY 48 00:02:17 00:04:35 0.498
GB113_dither OY 48 00:02:17 00:04:35 0.498
GB114_dither OY 48 00:02:17 00:04:35 0.498
GB131_dither OY 48 00:02:17 00:04:35 0.498
GB130_dither OY 48 00:02:17 00:04:35 0.498
GB129_dither OY 48 00:02:17 00:04:32 0.503
GB128_dither OY 48 00:02:17 00:04:35 0.498
GB127_dither OY 48 00:02:17 00:04:38 0.493
GB126_dither OY 48 00:02:17 00:04:35 0.498
GB125_dither OY 48 00:02:17 00:04:49 0.474
GCsky 96 00:04:34 00:11:22 0.402
GB63_dither_test OH 20 00:00:57 00:03:14 0.293
GB63_dither OH 96 00:04:34 00:09:30 0.481
GB62_dither OH 96 00:04:34 00:09:39 0.474
GB61_dither OH 96 00:04:34 00:09:30 0.481
GB60_dither OH 96 00:04:34 00:09:27 0.484
GB59_dither OH 96 00:04:34 00:09:27 0.484
GB58_dither OH 96 00:04:34 00:09:22 0.488
GB57_dither OH 96 00:04:34 00:09:22 0.488
GB74_dither OH 96 00:04:34 00:09:33 0.479
GB75_dither OH 96 00:04:34 00:09:25 0.486
GB76_dither OH 96 00:04:34 00:09:30 0.481
GB77_dither OH 96 00:04:34 00:09:30 0.481
GB78_dither OH 96 00:04:34 00:09:25 0.486
GB79_dither OH 96 00:04:34 00:09:33 0.479
GB80_dither OH 96 00:04:34 00:09:22 0.488
GB97_dither OH 96 00:04:34 00:09:22 0.488
GB96_dither OH 96 00:04:34 00:09:22 0.488
GB95_dither OH 96 00:04:34 00:10:57 0.418
GB94_dither OH 72 00:03:25 00:07:05 0.484
GB93_dither OH 72 00:03:25 00:07:11 0.477
GB92_dither OH 72 00:03:25 00:07:03 0.487
GB91_dither OH 72 00:03:25 00:07:03 0.487
GB108_dither OH 72 00:03:25 00:06:57 0.493
GB109_dither OH 72 00:03:25 00:07:05 0.484
GB110_dither OH 72 00:03:25 00:07:00 0.490
GB111_dither OH 72 00:03:25 00:07:14 0.474
GB112_dither OH 72 00:03:25 00:07:11 0.477
GB113_dither OH 72 00:03:25 00:06:57 0.493
GB114_dither OH 72 00:03:25 00:07:14 0.474
GB131_dither OH 72 00:03:25 00:07:22 0.465
GB130_dither OH 72 00:03:25 00:07:17 0.471
GB129_dither OH 72 00:03:25 00:07:11 0.477
GB128_dither OH 72 00:03:25 00:07:14 0.474
GB127_dither OH 72 00:03:25 00:07:03 0.487
GB126_dither OH 72 00:03:25 00:07:03 0.487
GB125_dither OH 72 00:03:25 00:08:43 0.393










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 122:32:27 280:01:13 0.438

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 1768:48:52 893:45:36 875:03:16 245:00:54 210:00:47 210:00:47 210:00:47 124:26:09
Observed 439:00:25
(24.82%)		 154:34:39
(17.30%)		 284:25:46
(32.50%)		 36:57:38
(15.09%)		 66:49:27
(31.82%)		 147:33:37
(70.26%)		 33:05:03
(15.75%)		 124:26:09
(N/A)
Remaining 1329:48:27
(75.18%)		 739:10:57
(82.70%)		 590:37:30
(67.50%)		 208:03:16
(84.91%)		 143:11:19
(68.18%)		 62:27:09
(29.74%)		 176:55:43
(84.25%)		 00:00:00
(N/A)











Camera status (2025/04/25)