Observation information
- date-obs: 2018-07-13
- time-obs: 02:31:32.307300000
- date-end: 2018-07-13
- time-end: 04:48:08.306900000
- obs_id: T02_065T01_9000002218
- exposure: 3023.79280858
- 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_15083cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15083cztM0_level2_quad_clean.evt
|
| Size (bytes) | 446,351,040 | 72,475,200 |
| Size | 425.7 MB
| 69.1 MB
|
| Events in quadrant A | 3,088,923 | 451,606 |
| Events in quadrant B | 3,178,508 | 459,234 |
| Events in quadrant C | 3,850,595 | 436,036 |
| Events in quadrant D | 2,984,055 | 420,247 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 12790 | 3 |
| B | 0 | 12974 | 2 |
| C | 0 | 15498 | 2 |
| D | 0 | 12927 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20 | 0 |
| B | 0 | 20 | 0 |
| C | 0 | 20 | 0 |
| D | 0 | 21 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 124 | 0 |
| B | 0 | 124 | 0 |
| C | 0 | 124 | 0 |
| D | 0 | 124 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6121 | 70 | 1.143604% |
| B | 6121 | 100 | 1.633720% |
| C | 6121 | 56 | 0.914883% |
| D | 6121 | 33 | 0.539128% |
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 | 7412 | 6129 | 0 | 0 | 0.00% | 0.00% |  |
| B | 7412 | 6128 | 5 | 5 | 0.07% | 0.08% |  |
| C | 7412 | 6129 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7412 | 6129 | 11 | 11 | 0.15% | 0.18% |  |
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 | 33230 | 204.41 | 794 | 780 | 158.7 |
| A | 0 | 226 | 6981 | 39.06 | 794 | 780 | 158.7 |
| A | 12 | 194 | 5730 | 31.18 | 794 | 780 | 158.7 |
| B | 3 | 64 | 48350 | 315.99 | 794 | 775 | 150.6 |
| B | 12 | 111 | 17469 | 110.88 | 794 | 775 | 150.6 |
| B | 11 | 111 | 15263 | 96.23 | 794 | 775 | 150.6 |
| C | 3 | 233 | 750732 | 4273.84 | 762 | 768 | 175.5 |
| C | 3 | 9 | 123926 | 701.84 | 762 | 768 | 175.5 |
| C | 7 | 247 | 8224 | 42.49 | 762 | 768 | 175.5 |
| D | 13 | 249 | 57980 | 310.79 | 756 | 734 | 184.2 |
| D | 13 | 104 | 27282 | 144.13 | 756 | 734 | 184.2 |
| D | 2 | 234 | 20077 | 105.02 | 756 | 734 | 184.2 |
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 |  |