Observation information
- date-obs: 2018-07-03
- time-obs: 13:40:38.577400000
- date-end: 2018-07-03
- time-end: 14:57:45.544100000
- obs_id: T02_052T01_9000002208
- exposure: 2271.08822893
- sourceid: AT2018cow
- observer: varunb
- ra_pnt: 244.0009
- dec_pnt: 22.26801
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1T02_052T01_9000002208_14941cztM0_level2.evt
| modeM0/AS1T02_052T01_9000002208_14941cztM0_level2_quad_clean.evt
|
| Size (bytes) | 334,215,360 | 47,865,600 |
| Size | 318.7 MB
| 45.6 MB
|
| Events in quadrant A | 2,082,562 | 299,604 |
| Events in quadrant B | 2,356,290 | 292,554 |
| Events in quadrant C | 2,887,432 | 274,233 |
| Events in quadrant D | 2,506,991 | 284,471 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 88 | 0 |
| B | 0 | 88 | 0 |
| C | 0 | 88 | 0 |
| D | 0 | 88 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 3 | 0 |
| B | 0 | 3 | 0 |
| C | 0 | 3 | 0 |
| D | 0 | 3 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 8881 | 3 |
| B | 0 | 9576 | 2 |
| C | 0 | 11207 | 2 |
| D | 0 | 10492 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 4227 | 131 | 3.099125% |
| B | 4227 | 172 | 4.069080% |
| C | 4227 | 317 | 7.499409% |
| D | 4227 | 133 | 3.146440% |
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 | 4628 | 4230 | 0 | 0 | 0.00% | 0.00% |  |
| B | 4628 | 4230 | 25 | 25 | 0.54% | 0.59% |  |
| C | 4628 | 4230 | 162 | 162 | 3.50% | 3.83% |  |
| D | 4628 | 4230 | 15 | 15 | 0.32% | 0.35% |  |
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 | 0 | 226 | 4680 | 37.34 | 539 | 527 | 111.2 |
| A | 12 | 194 | 4004 | 31.26 | 539 | 527 | 111.2 |
| A | 1 | 162 | 3928 | 30.58 | 539 | 527 | 111.2 |
| B | 10 | 16 | 110202 | 1045.3 | 531 | 516 | 104.9 |
| B | 0 | 189 | 95976 | 909.73 | 531 | 516 | 104.9 |
| B | 0 | 219 | 37621 | 353.61 | 531 | 516 | 104.9 |
| C | 9 | 236 | 804753 | 6719.04 | 507 | 510 | 119.7 |
| C | 3 | 233 | 100531 | 835.62 | 507 | 510 | 119.7 |
| C | 13 | 61 | 3723 | 26.84 | 507 | 510 | 119.7 |
| D | 7 | 254 | 431645 | 3424.92 | 517 | 505 | 125.9 |
| D | 13 | 249 | 59132 | 465.73 | 517 | 505 | 125.9 |
| D | 10 | 70 | 21668 | 168.12 | 517 | 505 | 125.9 |
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 |  |