Observation information
- date-obs: 2018-07-12
- time-obs: 19:39:52.305400000
- date-end: 2018-07-12
- time-end: 21:53:59.307300000
- obs_id: T02_065T01_9000002218
- exposure: 4180.37530194
- 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_15078cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15078cztM0_level2_quad_clean.evt
|
| Size (bytes) | 455,673,600 | 90,083,520 |
| Size | 434.6 MB
| 85.9 MB
|
| Events in quadrant A | 3,000,763 | 580,405 |
| Events in quadrant B | 3,206,562 | 589,714 |
| Events in quadrant C | 4,018,810 | 566,443 |
| Events in quadrant D | 3,138,750 | 544,322 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 13198 | 3 |
| B | 0 | 13668 | 2 |
| C | 0 | 16484 | 2 |
| D | 0 | 13847 | 2 |
| 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 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6402 | 30 | 0.468604% |
| B | 6402 | 46 | 0.718525% |
| C | 6402 | 32 | 0.499844% |
| D | 6402 | 49 | 0.765386% |
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 | 7553 | 6404 | 1 | 1 | 0.01% | 0.02% |  |
| B | 7553 | 6404 | 4 | 4 | 0.05% | 0.06% |  |
| C | 7553 | 6403 | 1 | 1 | 0.01% | 0.02% |  |
| D | 7553 | 6404 | 45 | 45 | 0.60% | 0.70% |  |
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 | 13 | 248 | 13227 | 79.91 | 773 | 758 | 156.0 |
| A | 0 | 226 | 6958 | 39.73 | 773 | 758 | 156.0 |
| A | 12 | 194 | 5838 | 32.56 | 773 | 758 | 156.0 |
| B | 3 | 64 | 57409 | 385.01 | 777 | 757 | 147.1 |
| B | 10 | 245 | 51679 | 346.07 | 777 | 757 | 147.1 |
| B | 3 | 209 | 19686 | 128.64 | 777 | 757 | 147.1 |
| C | 3 | 233 | 1074792 | 6182.69 | 753 | 757 | 173.7 |
| C | 3 | 232 | 6080 | 30.64 | 753 | 757 | 173.7 |
| C | 13 | 61 | 5381 | 26.62 | 753 | 757 | 173.7 |
| D | 9 | 1 | 145589 | 794.17 | 748 | 727 | 182.4 |
| D | 2 | 120 | 51812 | 280.06 | 748 | 727 | 182.4 |
| D | 13 | 249 | 35514 | 190.71 | 748 | 727 | 182.4 |
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 |  |