Observation information
- date-obs: 2018-07-13
- time-obs: 05:48:32.306300000
- date-end: 2018-07-13
- time-end: 08:18:28.305600000
- obs_id: T02_065T01_9000002218
- exposure: 3864.49790773
- 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_15085cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15085cztM0_level2_quad_clean.evt
|
| Size (bytes) | 511,522,560 | 83,960,640 |
| Size | 487.8 MB
| 80.1 MB
|
| Events in quadrant A | 3,587,163 | 516,274 |
| Events in quadrant B | 3,896,082 | 517,641 |
| Events in quadrant C | 4,017,985 | 505,091 |
| Events in quadrant D | 3,491,196 | 492,021 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 15376 | 3 |
| B | 0 | 16082 | 2 |
| C | 0 | 16192 | 2 |
| D | 0 | 15554 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16 | 0 |
| B | 0 | 16 | 0 |
| C | 0 | 16 | 0 |
| D | 0 | 16 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 152 | 0 |
| B | 0 | 152 | 0 |
| C | 0 | 152 | 0 |
| D | 0 | 152 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7341 | 217 | 2.956001% |
| B | 7341 | 319 | 4.345457% |
| C | 7341 | 163 | 2.220406% |
| D | 7341 | 166 | 2.261272% |
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 | 8997 | 7342 | 0 | 0 | 0.00% | 0.00% |  |
| B | 8997 | 7342 | 37 | 37 | 0.41% | 0.50% |  |
| C | 8997 | 7343 | 0 | 0 | 0.00% | 0.00% |  |
| D | 8997 | 7343 | 11 | 11 | 0.12% | 0.15% |  |
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 | 11239 | 54.75 | 927 | 907 | 188.7 |
| A | 0 | 253 | 9627 | 46.21 | 927 | 907 | 188.7 |
| A | 0 | 226 | 8092 | 38.07 | 927 | 907 | 188.7 |
| B | 10 | 245 | 138848 | 771.12 | 918 | 894 | 178.9 |
| B | 3 | 64 | 112291 | 622.68 | 918 | 894 | 178.9 |
| B | 3 | 209 | 23252 | 124.97 | 918 | 894 | 178.9 |
| C | 3 | 233 | 488051 | 2331.53 | 898 | 902 | 208.9 |
| C | 3 | 9 | 17786 | 80.81 | 898 | 902 | 208.9 |
| C | 7 | 247 | 12039 | 53.3 | 898 | 902 | 208.9 |
| D | 13 | 172 | 28470 | 126.39 | 896 | 870 | 218.4 |
| D | 13 | 104 | 24991 | 110.46 | 896 | 870 | 218.4 |
| D | 2 | 234 | 23414 | 103.24 | 896 | 870 | 218.4 |
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 |  |