Observation information
- date-obs: 2018-07-19
- time-obs: 08:31:02.396000000
- date-end: 2018-07-19
- time-end: 10:43:41.398300000
- obs_id: T02_068T01_9000002238
- exposure: 4248.1207789
- 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_15175cztM0_level2.evt
| modeM0/AS1T02_068T01_9000002238_15175cztM0_level2_quad_clean.evt
|
| Size (bytes) | 535,953,600 | 85,345,920 |
| Size | 511.1 MB
| 81.4 MB
|
| Events in quadrant A | 3,912,095 | 521,445 |
| Events in quadrant B | 3,724,544 | 525,917 |
| Events in quadrant C | 4,280,451 | 511,240 |
| Events in quadrant D | 3,798,183 | 496,870 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 4 | 0 |
| B | 0 | 4 | 0 |
| C | 0 | 4 | 0 |
| D | 0 | 4 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 154 | 0 |
| B | 0 | 154 | 0 |
| C | 0 | 154 | 0 |
| D | 0 | 154 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16769 | 2 |
| B | 0 | 15852 | 1 |
| C | 0 | 17394 | 1 |
| D | 0 | 16523 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7604 | 121 | 1.591268% |
| B | 7604 | 150 | 1.972646% |
| C | 7604 | 95 | 1.249342% |
| D | 7604 | 126 | 1.657023% |
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 | 7960 | 7605 | 0 | 0 | 0.00% | 0.00% |  |
| B | 7960 | 7605 | 20 | 20 | 0.25% | 0.26% |  |
| C | 7960 | 7606 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7960 | 7605 | 35 | 35 | 0.44% | 0.46% |  |
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 | 279245 | 1501.67 | 910 | 891 | 185.4 |
| A | 12 | 189 | 122561 | 656.39 | 910 | 891 | 185.4 |
| A | 0 | 226 | 7981 | 38.25 | 910 | 891 | 185.4 |
| B | 3 | 64 | 78979 | 445.86 | 910 | 885 | 175.2 |
| B | 0 | 205 | 23390 | 128.49 | 910 | 885 | 175.2 |
| B | 12 | 111 | 21540 | 117.93 | 910 | 885 | 175.2 |
| C | 3 | 233 | 815137 | 3923.21 | 886 | 888 | 207.5 |
| C | 13 | 61 | 6188 | 25.53 | 886 | 888 | 207.5 |
| C | 8 | 128 | 5002 | 19.82 | 886 | 888 | 207.5 |
| D | 2 | 33 | 260330 | 1198.38 | 881 | 852 | 216.5 |
| D | 1 | 255 | 63951 | 291.42 | 881 | 852 | 216.5 |
| D | 7 | 223 | 60810 | 276.91 | 881 | 852 | 216.5 |
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 |  |