Observation information
- date-obs: 2018-07-19
- time-obs: 03:03:12.386900000
- date-end: 2018-07-19
- time-end: 05:24:51.392000000
- obs_id: T02_068T01_9000002238
- exposure: 3506.00292642
- 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_15172cztM0_level2.evt
| modeM0/AS1T02_068T01_9000002238_15172cztM0_level2_quad_clean.evt
|
| Size (bytes) | 506,168,640 | 77,394,240 |
| Size | 482.7 MB
| 73.8 MB
|
| Events in quadrant A | 3,831,883 | 467,293 |
| Events in quadrant B | 3,455,549 | 474,812 |
| Events in quadrant C | 3,530,503 | 465,494 |
| Events in quadrant D | 4,036,709 | 448,908 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 15 | 0 |
| B | 0 | 15 | 0 |
| C | 0 | 15 | 0 |
| D | 0 | 16 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 140 | 0 |
| B | 0 | 140 | 0 |
| C | 0 | 140 | 0 |
| D | 0 | 140 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16101 | 3 |
| B | 0 | 14663 | 2 |
| C | 0 | 14907 | 2 |
| D | 0 | 16875 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6998 | 139 | 1.986282% |
| B | 6998 | 140 | 2.000572% |
| C | 6998 | 78 | 1.114604% |
| D | 6998 | 294 | 4.201200% |
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 | 7594 | 7000 | 19 | 19 | 0.25% | 0.27% |  |
| B | 7594 | 7000 | 4 | 4 | 0.05% | 0.06% |  |
| C | 7594 | 7000 | 1 | 1 | 0.01% | 0.01% |  |
| D | 7594 | 7000 | 205 | 205 | 2.70% | 2.93% |  |
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 | 420814 | 2429.86 | 852 | 832 | 172.8 |
| A | 9 | 143 | 76163 | 435.84 | 852 | 832 | 172.8 |
| A | 0 | 253 | 39593 | 224.26 | 852 | 832 | 172.8 |
| B | 3 | 64 | 40725 | 238.46 | 859 | 838 | 167.3 |
| B | 0 | 189 | 25428 | 147.01 | 859 | 838 | 167.3 |
| B | 12 | 111 | 20025 | 114.71 | 859 | 838 | 167.3 |
| C | 3 | 233 | 273686 | 1410.42 | 834 | 840 | 193.4 |
| C | 14 | 234 | 6243 | 27.93 | 834 | 840 | 193.4 |
| C | 13 | 61 | 5937 | 26.35 | 834 | 840 | 193.4 |
| D | 2 | 33 | 815346 | 4055.69 | 820 | 794 | 200.8 |
| D | 2 | 16 | 39680 | 193.62 | 820 | 794 | 200.8 |
| D | 12 | 222 | 36220 | 176.39 | 820 | 794 | 200.8 |
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 |  |