Observation information
- date-obs: 2015-11-25
- time-obs: 23-00-57.000006686
- date-end: 2015-11-26
- time-end: 01-08-48.000000615
- obs_id: P01_171T01_9000000126
- exposure: 5587.91856103
- sourceid: Vela X-1
- observer: dedhia
- ra_pnt: 135.5286
- dec_pnt: -40.5547
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1P01_171T01_9000000126_00872cztM0_level2.evt
| modeM0/AS1P01_171T01_9000000126_00872cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,233,714,240 | 89,824,320 |
| Size | 1.1 GB
| 85.7 MB
|
| Events in quadrant A | 9,212,389 | 552,698 |
| Events in quadrant B | 9,722,659 | 557,346 |
| Events in quadrant C | 9,000,943 | 544,526 |
| Events in quadrant D | 8,919,582 | 532,204 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 152 | 0 |
| B | 0 | 152 | 0 |
| C | 0 | 152 | 0 |
| D | 0 | 152 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 32768 | 0 |
| B | 0 | 34294 | 0 |
| C | 0 | 32228 | 0 |
| D | 0 | 31938 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7672 | 5 | 0.065172% |
| B | 7672 | 15 | 0.195516% |
| C | 7672 | 9 | 0.117310% |
| D | 7672 | 41 | 0.534411% |
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 | 7672 | 7672 | 381 | 381 | 4.97% | 4.97% |  |
| B | 7672 | 7672 | 509 | 509 | 6.63% | 6.63% |  |
| C | 7672 | 7672 | 321 | 321 | 4.18% | 4.18% |  |
| D | 7672 | 7672 | 382 | 382 | 4.98% | 4.98% |  |
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 | 11 | 79 | 11202 | 15.05 | 2400 | 2424 | 583.2 |
| A | 3 | 111 | 7585 | 8.85 | 2400 | 2424 | 583.2 |
| A | 14 | 203 | 6349 | 6.73 | 2400 | 2424 | 583.2 |
| B | 0 | 220 | 37452 | 59.14 | 2521 | 2532 | 590.5 |
| B | 5 | 249 | 32901 | 51.43 | 2521 | 2532 | 590.5 |
| B | 0 | 184 | 32162 | 50.18 | 2521 | 2532 | 590.5 |
| C | 3 | 111 | 31537 | 45.35 | 2289 | 2374 | 643.1 |
| C | 3 | 79 | 20284 | 27.85 | 2289 | 2374 | 643.1 |
| C | 15 | 241 | 13075 | 16.64 | 2289 | 2374 | 643.1 |
| D | 13 | 169 | 214867 | 309.7 | 2199 | 2276 | 686.4 |
| D | 1 | 4 | 135993 | 194.8 | 2199 | 2276 | 686.4 |
| D | 2 | 107 | 101583 | 144.67 | 2199 | 2276 | 686.4 |
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 |  |