Observation information
- date-obs: 2018-07-20
- time-obs: 01:49:52.389500000
- date-end: 2018-07-20
- time-end: 04:03:46.388100000
- obs_id: T02_068T01_9000002238
- exposure: 3505.84902173
- sourceid: AT2018cow
- observer: lazygun37
- ra_pnt: 244.0009
- dec_pnt: 22.26801
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1T02_068T01_9000002238_15186cztM0_level2.evt
| modeM0/AS1T02_068T01_9000002238_15186cztM0_level2_quad_clean.evt
|
| Size (bytes) | 473,117,760 | 77,601,600 |
| Size | 451.2 MB
| 74.0 MB
|
| Events in quadrant A | 3,693,169 | 475,895 |
| Events in quadrant B | 3,290,404 | 486,058 |
| Events in quadrant C | 3,568,385 | 468,218 |
| Events in quadrant D | 3,321,958 | 453,172 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 13 | 0 |
| B | 0 | 13 | 0 |
| C | 0 | 13 | 0 |
| D | 0 | 14 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 136 | 0 |
| B | 0 | 136 | 0 |
| C | 0 | 136 | 0 |
| D | 0 | 136 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 15679 | 3 |
| B | 0 | 13988 | 2 |
| C | 0 | 14948 | 2 |
| D | 0 | 14484 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6692 | 48 | 0.717274% |
| B | 6692 | 52 | 0.777047% |
| C | 6692 | 16 | 0.239091% |
| D | 6692 | 37 | 0.552899% |
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 | 7593 | 6694 | 0 | 0 | 0.00% | 0.00% |  |
| B | 7593 | 6694 | 12 | 12 | 0.16% | 0.18% |  |
| C | 7593 | 6694 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7593 | 6694 | 32 | 32 | 0.42% | 0.48% |  |
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 | 15 | 239 | 535270 | 3248.38 | 812 | 797 | 164.5 |
| A | 12 | 189 | 32438 | 192.31 | 812 | 797 | 164.5 |
| A | 13 | 248 | 7524 | 40.88 | 812 | 797 | 164.5 |
| B | 3 | 64 | 46472 | 292.69 | 816 | 796 | 156.1 |
| B | 12 | 111 | 18691 | 114.67 | 816 | 796 | 156.1 |
| B | 4 | 48 | 17129 | 104.66 | 816 | 796 | 156.1 |
| C | 3 | 233 | 490197 | 2660.1 | 789 | 795 | 184.0 |
| C | 13 | 61 | 5800 | 27.2 | 789 | 795 | 184.0 |
| C | 0 | 207 | 3811 | 16.39 | 789 | 795 | 184.0 |
| D | 2 | 33 | 183662 | 969.24 | 781 | 759 | 188.7 |
| D | 13 | 249 | 58559 | 306.29 | 781 | 759 | 188.7 |
| D | 10 | 70 | 40932 | 212.88 | 781 | 759 | 188.7 |
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 |  |