Observation information
- date-obs: 2018-07-20
- time-obs: 05:11:49.386800000
- date-end: 2018-07-20
- time-end: 07:32:41.385300000
- obs_id: T02_068T01_9000002238
- exposure: 4063.67411007
- 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_15188cztM0_level2.evt
| modeM0/AS1T02_068T01_9000002238_15188cztM0_level2_quad_clean.evt
|
| Size (bytes) | 573,799,680 | 86,823,360 |
| Size | 547.2 MB
| 82.8 MB
|
| Events in quadrant A | 4,058,927 | 522,389 |
| Events in quadrant B | 4,121,412 | 528,691 |
| Events in quadrant C | 4,475,397 | 515,668 |
| Events in quadrant D | 4,170,578 | 498,113 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 3 | 0 |
| B | 0 | 3 | 0 |
| C | 0 | 3 | 0 |
| D | 0 | 3 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 164 | 0 |
| B | 0 | 164 | 0 |
| C | 0 | 164 | 0 |
| D | 0 | 164 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 17413 | 3 |
| B | 0 | 17388 | 2 |
| C | 0 | 18212 | 2 |
| D | 0 | 18087 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8117 | 454 | 5.593199% |
| B | 8117 | 508 | 6.258470% |
| C | 8117 | 343 | 4.225699% |
| D | 8117 | 377 | 4.644573% |
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 | 8453 | 8120 | 0 | 0 | 0.00% | 0.00% |  |
| B | 8453 | 8120 | 4 | 4 | 0.05% | 0.05% |  |
| C | 8453 | 8121 | 0 | 0 | 0.00% | 0.00% |  |
| D | 8453 | 8121 | 56 | 56 | 0.66% | 0.69% |  |
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 | 117092 | 549.18 | 1025 | 1000 | 211.4 |
| A | 0 | 226 | 8706 | 36.45 | 1025 | 1000 | 211.4 |
| A | 12 | 194 | 7499 | 30.74 | 1025 | 1000 | 211.4 |
| B | 3 | 64 | 64432 | 311.66 | 1024 | 993 | 203.6 |
| B | 12 | 111 | 25001 | 117.95 | 1024 | 993 | 203.6 |
| B | 11 | 111 | 21095 | 98.76 | 1024 | 993 | 203.6 |
| C | 3 | 233 | 557707 | 2367.11 | 1002 | 1003 | 235.2 |
| C | 7 | 247 | 8970 | 33.88 | 1002 | 1003 | 235.2 |
| C | 13 | 61 | 7144 | 26.11 | 1002 | 1003 | 235.2 |
| D | 1 | 255 | 235465 | 955.25 | 999 | 967 | 245.5 |
| D | 2 | 33 | 67947 | 272.85 | 999 | 967 | 245.5 |
| D | 10 | 70 | 35307 | 139.89 | 999 | 967 | 245.5 |
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 |  |