PRIME Observation Log 2025/01/16

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Observation Log (Time is in UT)

Date: 2025/01/16
Local observer: Ryusei Hamada
Remote observer: Mayu Nishio, Shunya Hamada, Tsutsumi Nagai
Weather: clear
Comment:
Detector Temperature: 122.00117 +- 0.01100 K
ImageAcquisitionErrors occurred 5 times @
2025-01-16 20:55:21 SAT
2025-01-16 23:37:02 SAT
2025-01-17 02:01:57 SAT
2025-01-17 02:19:06 SAT
2025-01-17 03:23:45 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:11:32
Morning 05:22:09
Science Observation
(Sun altitude < -10°)
Start 20:36:19
End 04:57:22
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 04:50:57
End 04:57:22


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 07:14:35 08:21:02 0.867
GB Time 00:00:00 00:06:24 0.000
Non-GB Time 07:14:35 08:14:38 0.879


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.)
NASA 2334 01:51:15 05:46:41 0.321
OU 536 00:25:32 01:20:42 0.317
ALLSKY 4 00:00:11 00:14:23 0.013
CALIB 336 00:16:00 00:53:23 0.300
SAAO 1 00:00:02 00:03:35 0.013
ABC 1 00:00:02 00:03:35 0.013


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 2337 01:51:23 05:57:29 0.312
ToO 535 00:25:30 01:17:06 0.331
SKY 192 00:09:09 00:37:41 0.243
TWILIGHT 144 00:06:51 00:15:42 0.437


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field4040_test 25 00:01:11 00:10:12 0.117
field4040 25 00:01:11 00:02:16 0.524
field4251 25 00:01:11 00:02:13 0.535
field4252 25 00:01:11 00:02:10 0.547
field4253 25 00:01:11 00:02:44 0.435
field4469 25 00:01:11 00:02:16 0.524
field4470 25 00:01:11 00:02:33 0.465
field4691 25 00:01:11 00:02:38 0.452
field4692 25 00:01:11 00:02:24 0.494
field4471 25 00:01:11 00:02:19 0.514
field4472 25 00:01:11 00:03:01 0.395
field4473 25 00:01:11 00:02:13 0.535
field4254 25 00:01:11 00:02:19 0.514
field4255 25 00:01:11 00:02:35 0.458
field4041 25 00:01:11 00:02:13 0.535
field4042 25 00:01:11 00:02:13 0.535
field3833 25 00:01:11 00:02:21 0.504
field3834 25 00:01:11 00:02:10 0.547
field3629 25 00:01:11 00:02:13 0.535
field3630 25 00:01:11 00:02:21 0.504
field3433 25 00:01:11 00:02:24 0.494
field3631 73 00:03:28 00:09:09 0.380
field3632 73 00:03:28 00:06:09 0.565
field3835 73 00:03:28 00:06:06 0.569
field3836 65 00:03:05 00:14:18 0.216
field4043 49 00:02:20 00:04:21 0.536
field4044 49 00:02:20 00:04:21 0.536
field4256 49 00:02:20 00:04:21 0.536
field4257 49 00:02:20 00:04:07 0.566
field4474 49 00:02:20 00:04:18 0.543
field4475 49 00:02:20 00:04:52 0.480
field4478 49 00:02:20 00:04:21 0.536
field4477 49 00:02:20 00:03:59 0.586
field4476 49 00:02:20 00:04:15 0.549
field4260 49 00:02:20 00:04:46 0.489
field4259 49 00:02:20 00:04:54 0.475
field4258 57 00:02:43 00:14:55 0.182
field4046 49 00:02:20 00:03:55 0.594
field4047 57 00:02:43 00:18:39 0.146
field4045 49 00:02:20 00:04:45 0.491
field3838 49 00:02:20 00:12:25 0.188
field13318_test 35 00:01:40 00:18:49 0.089
field13318 500 00:23:50 00:58:16 0.409
field3631_test 72 00:03:25 00:29:20 0.117
field4258_test 100 00:04:46 00:36:16 0.131
field4047_test 8 00:00:22 00:01:52 0.203
field3837_test 32 00:01:31 00:12:05 0.126
field3837 24 00:01:08 00:01:45 0.652
field3635 24 00:01:08 00:01:45 0.652
field3634 24 00:01:08 00:01:45 0.652
field3633 24 00:01:08 00:02:04 0.549
field3435 24 00:01:08 00:01:45 0.652
field3436 24 00:01:08 00:01:45 0.652
field3434 24 00:01:08 00:01:45 0.652
field3437 24 00:01:08 00:01:45 0.652
field3438 24 00:01:08 00:01:45 0.652
field3636 24 00:01:08 00:01:45 0.652
field3637 24 00:01:08 00:01:48 0.635
field3839 24 00:01:08 00:01:47 0.638
field3840 24 00:01:08 00:02:02 0.559
field3841 24 00:01:08 00:01:45 0.652
field4048 24 00:01:08 00:01:48 0.635
field4049 24 00:01:08 00:01:50 0.622
field4261 48 00:02:17 00:14:31 0.157
field4261_test 8 00:00:22 00:02:59 0.127
field4262 24 00:01:08 00:01:45 0.652
field4479 24 00:01:08 00:02:04 0.549
field4480 24 00:01:08 00:16:08 0.071
field6713_test 4 00:00:11 00:14:23 0.013
SKY_test 24 00:01:08 00:03:42 0.309
SKY 168 00:08:00 00:33:59 0.236
FLAT_test ZO 4 00:00:11 00:02:00 0.095
FLAT ZO 140 00:06:40 00:13:41 0.488










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 66:05:09 131:12:51 0.504

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 1889:22:42 945:28:43 943:53:58 264:17:30 226:32:09 226:32:09 226:32:09 08:01:55
Observed 66:05:09
(3.50%)		 00:00:00
(0.00%)		 66:05:09
(7.00%)		 00:43:50
(0.28%)		 13:15:24
(5.85%)		 51:22:03
(22.68%)		 00:43:50
(0.32%)		 08:01:55
(N/A)
Remaining 1823:17:32
(96.50%)		 945:28:43
(100.00%)		 877:48:48
(93.00%)		 263:33:39
(99.72%)		 213:16:44
(94.15%)		 175:10:05
(77.32%)		 225:48:18
(99.68%)		 00:00:00
(N/A)











Camera status (2025/01/16)