Observation information
- date-obs: 2018-07-13
- time-obs: 00:41:32.307600000
- date-end: 2018-07-13
- time-end: 03:06:04.307900000
- obs_id: T02_065T01_9000002218
- exposure: 3340.17304496
- sourceid: AT2018cow
- observer: varunb
- ra_pnt: 244.0009
- dec_pnt: 22.26801
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1T02_065T01_9000002218_15082cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15082cztM0_level2_quad_clean.evt
|
| Size (bytes) | 453,968,640 | 81,236,160 |
| Size | 432.9 MB
| 77.5 MB
|
| Events in quadrant A | 3,109,292 | 518,426 |
| Events in quadrant B | 3,249,580 | 529,905 |
| Events in quadrant C | 3,922,442 | 502,397 |
| Events in quadrant D | 3,048,919 | 479,272 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 12885 | 3 |
| B | 0 | 13249 | 2 |
| C | 0 | 15812 | 2 |
| D | 0 | 13104 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 25 | 0 |
| B | 0 | 25 | 0 |
| C | 0 | 25 | 0 |
| D | 0 | 25 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 126 | 0 |
| B | 0 | 126 | 0 |
| C | 0 | 126 | 0 |
| D | 0 | 126 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6157 | 32 | 0.519734% |
| B | 6157 | 66 | 1.071951% |
| C | 6157 | 40 | 0.649667% |
| D | 6157 | 28 | 0.454767% |
Noise dominated fraction
Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.
| Quadrant |
# 1 sec bins |
Bins with >0 counts |
Bins with >2000 counts |
High rate bins dominated by noise |
Noise dominated (total time) |
Noise dominated (detector-on time) |
Marked lightcurve |
| A | 7508 | 6164 | 1 | 1 | 0.01% | 0.02% |  |
| B | 7508 | 6164 | 17 | 17 | 0.23% | 0.28% |  |
| C | 7508 | 6164 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7508 | 6164 | 22 | 22 | 0.29% | 0.36% |  |
Top noisy pixels
Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1
| Pixel properties |
Quadrant properties |
| Quadrant |
DetID |
PixID |
Counts |
Sigma |
Mean |
Median |
Sigma |
| A | 12 | 189 | 20046 | 120.44 | 802 | 787 | 159.9 |
| A | 0 | 226 | 7117 | 39.59 | 802 | 787 | 159.9 |
| A | 12 | 194 | 5790 | 31.29 | 802 | 787 | 159.9 |
| B | 3 | 64 | 71851 | 472.52 | 805 | 788 | 150.4 |
| B | 12 | 111 | 17318 | 109.91 | 805 | 788 | 150.4 |
| B | 11 | 111 | 15016 | 94.61 | 805 | 788 | 150.4 |
| C | 3 | 233 | 894669 | 5058.71 | 770 | 776 | 176.7 |
| C | 3 | 9 | 19469 | 105.79 | 770 | 776 | 176.7 |
| C | 13 | 61 | 5530 | 26.9 | 770 | 776 | 176.7 |
| D | 13 | 249 | 89308 | 482.19 | 760 | 736 | 183.7 |
| D | 13 | 104 | 40468 | 216.3 | 760 | 736 | 183.7 |
| D | 2 | 234 | 19679 | 103.13 | 760 | 736 | 183.7 |
Detector plane histogram (DPH)
Histogram calculated using DETX and DETY for each event in the final _common_clean file
| Quadrant A |
 |
 |
Quadrant B |
| Quadrant D |
 |
 |
Quadrant C |
Count rate plots and images
| Plot type |
Count rate plots |
Images |
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data. |
 |
 |
Quadrant-wise count rates
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins |
 |
 |
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins |
 |
 |
Housekeeping plots
| Parameter |
Plot |
| CZT HV Monitor |  |
| D_VDD |  |
| Temperature 1 |  |
| Veto HV Monitor |  |
| Veto LLD |  |
| Alpha Counter |  |
| _CPM_Rate |  |
| CZT Counter |  |
| +2.5 Volts monitor |  |
| +5 Volts monitor |  |
| _ROLL_ROT |  |
| _Roll_DEC |  |
| _Roll_RA |  |
| Veto Counter |  |