PRIME Observation Log 2025/01/19

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Observation Log (Time is in UT)

Date: 2025/01/19
Local observer: Ryusei Hamada
Remote observer: Ryunosuke Oishi, Seiya Nakayama
Weather: Clear
Comment:
Detector Temperature: 121.99977 +- 0.00397 K
ImageAcquisitionErrors occurred 2 times @
2025-01-19 21:51:30 SAT
2025-01-19 22:03:34 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:10:27
Morning 05:25:08
Science Observation
(Sun altitude < -10°)
Start 20:35:02
End 05:00:33
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 04:39:09
End 05:00:33


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 07:39:55 08:25:30 0.910
GB Time 00:00:00 00:21:23 0.000
Non-GB Time 07:39:55 08:04:06 0.950


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 400 00:19:04 00:43:08 0.442
NASA 2801 02:13:30 05:36:59 0.396
OU 693 00:33:01 01:25:07 0.388
ALLSKY 708 00:33:44 01:15:37 0.446
SAAO 177 00:08:26 00:18:54 0.446
ABC 177 00:08:26 00:18:54 0.446


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 400 00:19:04 00:43:08 0.442
all_sky_grid 3332 02:38:49 06:33:42 0.403
ToO 516 00:24:35 01:06:12 0.371


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT ZO 200 00:09:32 00:25:56 0.367
field3426_test 92 00:04:23 01:16:05 0.058
field3426 97 00:04:37 00:07:23 0.625
field3427 105 00:05:00 00:11:53 0.421
field3232 81 00:03:51 00:08:30 0.454
field3233 57 00:02:43 00:15:50 0.172
field3043 49 00:02:20 00:04:01 0.580
field3044 49 00:02:20 00:04:04 0.573
field2859 49 00:02:20 00:03:56 0.594
field2860 49 00:02:20 00:03:58 0.586
field2861 49 00:02:20 00:04:01 0.580
field2681 49 00:02:20 00:03:58 0.587
field2682 49 00:02:20 00:04:21 0.536
field2508 49 00:02:20 00:04:01 0.580
field2509 49 00:02:20 00:04:01 0.580
field2340 49 00:02:20 00:03:58 0.587
field2341 49 00:02:20 00:04:01 0.580
field2177 49 00:02:20 00:03:56 0.594
field2342 49 00:02:20 00:03:58 0.587
field2343 49 00:02:20 00:03:58 0.587
field2510 49 00:02:20 00:04:04 0.573
field2683 49 00:02:20 00:06:35 0.354
field13318_test 16 00:00:45 00:08:56 0.085
field13318 500 00:23:50 00:57:16 0.416
field2684 49 00:02:20 00:03:58 0.587
field2862 49 00:02:20 00:03:56 0.594
field2863 49 00:02:20 00:03:56 0.594
field3045 49 00:02:20 00:03:58 0.587
field3046 49 00:02:20 00:03:56 0.594
field3234 49 00:02:20 00:03:56 0.594
field3235 49 00:02:20 00:03:58 0.587
field3428 49 00:02:20 00:03:56 0.594
field3429 49 00:02:20 00:03:50 0.608
field3430 49 00:02:20 00:03:56 0.594
field3431 49 00:02:20 00:03:53 0.601
field3432 49 00:02:20 00:04:01 0.580
field3236 49 00:02:20 00:05:31 0.423
field3237_test 12 00:00:34 00:05:51 0.098
field3237 49 00:02:20 00:03:53 0.601
field3238 49 00:02:20 00:03:58 0.587
field3047 49 00:02:20 00:03:56 0.594
field3048 49 00:02:20 00:03:56 0.594
field3049 49 00:02:20 00:03:58 0.587
field2864 49 00:02:20 00:03:53 0.601
field2865 49 00:02:20 00:05:59 0.390
field2684_test 16 00:00:45 00:07:54 0.096
field2685 25 00:01:11 00:02:10 0.547
field2686 25 00:01:11 00:02:10 0.547
field2511 25 00:01:11 00:02:13 0.535
field2512 25 00:01:11 00:02:13 0.535
field2344 25 00:01:11 00:02:07 0.559
field2345 25 00:01:11 00:02:10 0.547
field2346 25 00:01:11 00:02:10 0.547
field2513 25 00:01:11 00:02:10 0.547
field2514 25 00:01:11 00:02:07 0.559
field2687 25 00:01:11 00:02:10 0.547
field2688 25 00:01:11 00:02:10 0.547
field2866 25 00:01:11 00:02:10 0.547
field2867 25 00:01:11 00:02:10 0.547
field3050 25 00:01:11 00:02:10 0.547
field3051 25 00:01:11 00:02:10 0.547
field3239 25 00:01:11 00:02:26 0.488
field8313_test 28 00:01:20 00:09:39 0.138
field8313 40 00:01:54 00:03:52 0.491
field8314 40 00:01:54 00:03:52 0.491
field8315 40 00:01:54 00:03:52 0.491
field8316 40 00:01:54 00:03:52 0.491
field8317 40 00:01:54 00:03:52 0.491
field8318 40 00:01:54 00:03:52 0.491
field8319 40 00:01:54 00:03:50 0.497
field8320 40 00:01:54 00:03:52 0.491
field8321 40 00:01:54 00:03:52 0.491
field8322 40 00:01:54 00:03:50 0.497
field8323 40 00:01:54 00:03:52 0.491
field8324 40 00:01:54 00:03:50 0.497
field8325 40 00:01:54 00:03:50 0.497
field8326 40 00:01:54 00:03:52 0.491
field8327 40 00:01:54 00:03:52 0.491
field8328 40 00:01:54 00:03:50 0.497
field8329 40 00:01:54 00:04:05 0.465
FLAT OJ 200 00:09:32 00:17:11 0.554










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 90:43:46 156:24:50 0.580

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 1901:25:20 945:04:08 956:21:12 267:46:44 229:31:29 229:31:29 229:31:29 09:46:29
Observed 90:43:47
(4.77%)		 00:00:00
(0.00%)		 90:43:47
(9.49%)		 02:15:08
(0.84%)		 21:45:52
(9.48%)		 64:27:37
(28.08%)		 02:15:08
(0.98%)		 09:46:29
(N/A)
Remaining 1810:41:33
(95.23%)		 945:04:08
(100.00%)		 865:37:24
(90.51%)		 265:31:35
(99.16%)		 207:45:36
(90.52%)		 165:03:51
(71.92%)		 227:16:20
(99.02%)		 00:00:00
(N/A)











Camera status (2025/01/19)