Observation information
- date-obs: 2018-07-13
- time-obs: 04:21:32.306600000
- date-end: 2018-07-13
- time-end: 06:35:46.305900000
- obs_id: T02_065T01_9000002218
- exposure: 2960.31556652
- 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_15084cztM0_level2.evt
| modeM0/AS1T02_065T01_9000002218_15084cztM0_level2_quad_clean.evt
|
| Size (bytes) | 454,777,920 | 68,624,640 |
| Size | 433.7 MB
| 65.4 MB
|
| Events in quadrant A | 3,192,693 | 413,392 |
| Events in quadrant B | 3,438,545 | 415,852 |
| Events in quadrant C | 3,613,956 | 401,776 |
| Events in quadrant D | 3,082,721 | 389,990 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 13546 | 3 |
| B | 0 | 14100 | 2 |
| C | 0 | 14629 | 2 |
| D | 0 | 13653 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 14 | 0 |
| B | 0 | 14 | 0 |
| C | 0 | 14 | 0 |
| D | 0 | 15 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 134 | 0 |
| B | 0 | 134 | 0 |
| C | 0 | 134 | 0 |
| D | 0 | 134 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6548 | 81 | 1.237019% |
| B | 6548 | 126 | 1.924252% |
| C | 6548 | 52 | 0.794136% |
| D | 6548 | 54 | 0.824679% |
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 | 7629 | 6550 | 1 | 1 | 0.01% | 0.02% |  |
| B | 7629 | 6550 | 14 | 14 | 0.18% | 0.21% |  |
| C | 7629 | 6551 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7629 | 6551 | 10 | 10 | 0.13% | 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 | 9947 | 54.36 | 826 | 809 | 168.1 |
| A | 0 | 226 | 7233 | 38.22 | 826 | 809 | 168.1 |
| A | 9 | 143 | 6886 | 36.15 | 826 | 809 | 168.1 |
| B | 3 | 64 | 148524 | 945.96 | 822 | 802 | 156.2 |
| B | 3 | 209 | 41253 | 259.03 | 822 | 802 | 156.2 |
| B | 12 | 111 | 18519 | 113.45 | 822 | 802 | 156.2 |
| C | 3 | 233 | 487763 | 2654.83 | 794 | 802 | 183.4 |
| C | 7 | 247 | 17733 | 92.3 | 794 | 802 | 183.4 |
| C | 3 | 9 | 12012 | 61.11 | 794 | 802 | 183.4 |
| D | 13 | 104 | 40138 | 204.54 | 792 | 770 | 192.5 |
| D | 13 | 172 | 22218 | 111.43 | 792 | 770 | 192.5 |
| D | 2 | 234 | 21523 | 107.82 | 792 | 770 | 192.5 |
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 |  |