Observation information
- date-obs: 2018-07-20
- time-obs: 22:38:12.370600000
- date-end: 2018-07-21
- time-end: 00:57:09.364000000
- obs_id: T02_069T01_9000002242
- exposure: 3735.43663746
- sourceid: AT2018cow
- observer: varunb
- ra_pnt: 244.0009
- dec_pnt: 22.26801
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1T02_069T01_9000002242_15199cztM0_level2.evt
| modeM0/AS1T02_069T01_9000002242_15199cztM0_level2_quad_clean.evt
|
| Size (bytes) | 484,951,680 | 85,829,760 |
| Size | 462.5 MB
| 81.9 MB
|
| Events in quadrant A | 3,038,943 | 554,398 |
| Events in quadrant B | 4,983,197 | 548,519 |
| Events in quadrant C | 3,263,057 | 545,911 |
| Events in quadrant D | 2,982,679 | 519,468 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 12910 | 3 |
| B | 0 | 18753 | 2 |
| C | 0 | 13314 | 2 |
| D | 0 | 13060 | 2 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 126 | 0 |
| B | 0 | 126 | 0 |
| C | 0 | 126 | 0 |
| D | 0 | 126 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 21 | 0 |
| B | 0 | 21 | 0 |
| C | 0 | 21 | 0 |
| D | 0 | 22 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6168 | 19 | 0.308042% |
| B | 6168 | 596 | 9.662776% |
| C | 6168 | 15 | 0.243191% |
| D | 6168 | 21 | 0.340467% |
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 | 7510 | 6161 | 0 | 0 | 0.00% | 0.00% |  |
| B | 7510 | 6161 | 424 | 424 | 5.65% | 6.88% |  |
| C | 7510 | 6161 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7510 | 6161 | 12 | 12 | 0.16% | 0.19% |  |
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 | 45728 | 287.2 | 776 | 760 | 156.6 |
| A | 15 | 233 | 9055 | 52.98 | 776 | 760 | 156.6 |
| A | 0 | 226 | 6831 | 38.77 | 776 | 760 | 156.6 |
| B | 3 | 112 | 1901971 | 13432.53 | 755 | 738 | 141.5 |
| B | 3 | 64 | 53991 | 376.24 | 755 | 738 | 141.5 |
| B | 0 | 229 | 16597 | 112.05 | 755 | 738 | 141.5 |
| C | 3 | 233 | 269525 | 1555.61 | 754 | 759 | 172.8 |
| C | 7 | 247 | 34866 | 197.41 | 754 | 759 | 172.8 |
| C | 8 | 128 | 10592 | 56.91 | 754 | 759 | 172.8 |
| D | 2 | 33 | 63711 | 347.03 | 745 | 722 | 181.5 |
| D | 2 | 234 | 21178 | 112.7 | 745 | 722 | 181.5 |
| D | 9 | 68 | 20306 | 107.89 | 745 | 722 | 181.5 |
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 |  |