Observation information
- date-obs: 2018-07-13
- time-obs: 11:11:14.303700000
- date-end: 2018-07-13
- time-end: 12:31:51.302700000
- obs_id: T02_065T01_9000002218
- exposure: 3109.65918031
- 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_15088cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15088cztM0_level2_quad_clean.evt
|
| Size (bytes) | 319,907,520 | 60,096,960 |
| Size | 305.1 MB
| 57.3 MB
|
| Events in quadrant A | 2,324,451 | 379,323 |
| Events in quadrant B | 2,298,331 | 381,581 |
| Events in quadrant C | 2,574,076 | 368,566 |
| Events in quadrant D | 2,171,836 | 361,138 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 10047 | 1 |
| B | 0 | 9942 | 1 |
| C | 0 | 10493 | 1 |
| D | 0 | 9818 | 1 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 1 | 0 |
| B | 0 | 1 | 0 |
| C | 0 | 1 | 0 |
| D | 0 | 1 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 98 | 0 |
| B | 0 | 98 | 0 |
| C | 0 | 98 | 0 |
| D | 0 | 98 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 4673 | 192 | 4.108710% |
| B | 4673 | 172 | 3.680719% |
| C | 4673 | 141 | 3.017334% |
| D | 4673 | 147 | 3.145731% |
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 | 4839 | 4675 | 21 | 21 | 0.43% | 0.45% |  |
| B | 4839 | 4675 | 4 | 4 | 0.08% | 0.09% |  |
| C | 4839 | 4675 | 0 | 0 | 0.00% | 0.00% |  |
| D | 4839 | 4674 | 10 | 10 | 0.21% | 0.21% |  |
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 | 4 | 2 | 76477 | 654.78 | 561 | 547 | 116.0 |
| A | 13 | 248 | 59143 | 505.3 | 561 | 547 | 116.0 |
| A | 12 | 189 | 31914 | 270.49 | 561 | 547 | 116.0 |
| B | 3 | 64 | 65487 | 591.03 | 559 | 542 | 109.9 |
| B | 3 | 209 | 24421 | 217.31 | 559 | 542 | 109.9 |
| B | 12 | 111 | 12998 | 113.36 | 559 | 542 | 109.9 |
| C | 3 | 233 | 439085 | 3473.55 | 545 | 546 | 126.3 |
| C | 13 | 61 | 3903 | 26.59 | 545 | 546 | 126.3 |
| C | 7 | 247 | 2682 | 16.91 | 545 | 546 | 126.3 |
| D | 9 | 1 | 23008 | 167.84 | 549 | 531 | 133.9 |
| D | 2 | 120 | 20011 | 145.46 | 549 | 531 | 133.9 |
| D | 2 | 234 | 17583 | 127.33 | 549 | 531 | 133.9 |
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 |  |