Observation information
- date-obs: 2015-11-25
- time-obs: 21-07-33.000007150
- date-end: 2015-11-25
- time-end: 23-23-04.000000662
- obs_id: P01_171T01_9000000126
- exposure: 5230.5621869
- 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_00871cztM0_level2.evt
| modeM0/AS1P01_171T01_9000000126_00871cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,105,208,640 | 83,989,440 |
| Size | 1.0 GB
| 80.1 MB
|
| Events in quadrant A | 8,267,329 | 520,947 |
| Events in quadrant B | 8,952,618 | 523,085 |
| Events in quadrant C | 7,985,711 | 512,884 |
| Events in quadrant D | 7,803,583 | 500,901 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 142 | 0 |
| B | 0 | 142 | 0 |
| C | 0 | 142 | 0 |
| D | 0 | 142 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 29515 | 0 |
| B | 0 | 31542 | 0 |
| C | 0 | 28670 | 0 |
| D | 0 | 28161 | 0 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 12 | 0 |
| B | 0 | 12 | 0 |
| C | 0 | 12 | 0 |
| D | 0 | 12 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6968 | 21 | 0.301378% |
| B | 6968 | 66 | 0.947187% |
| C | 6968 | 7 | 0.100459% |
| D | 6968 | 25 | 0.358783% |
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 | 7658 | 6969 | 255 | 255 | 3.33% | 3.66% |  |
| B | 7658 | 6969 | 438 | 438 | 5.72% | 6.28% |  |
| C | 7658 | 6969 | 163 | 163 | 2.13% | 2.34% |  |
| D | 7658 | 6969 | 222 | 222 | 2.90% | 3.19% |  |
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 | 133 | 68378 | 127.79 | 2135 | 2151 | 518.3 |
| A | 11 | 79 | 8538 | 12.32 | 2135 | 2151 | 518.3 |
| A | 10 | 133 | 7159 | 9.66 | 2135 | 2151 | 518.3 |
| B | 0 | 184 | 213747 | 404.08 | 2239 | 2250 | 523.4 |
| B | 0 | 220 | 120093 | 225.15 | 2239 | 2250 | 523.4 |
| B | 5 | 191 | 42632 | 77.15 | 2239 | 2250 | 523.4 |
| C | 3 | 111 | 25268 | 40.85 | 2030 | 2106 | 567.0 |
| C | 3 | 79 | 15275 | 23.22 | 2030 | 2106 | 567.0 |
| C | 15 | 241 | 11503 | 16.57 | 2030 | 2106 | 567.0 |
| D | 13 | 169 | 146851 | 240.41 | 1950 | 2020 | 602.4 |
| D | 13 | 73 | 109928 | 179.12 | 1950 | 2020 | 602.4 |
| D | 11 | 131 | 89659 | 145.48 | 1950 | 2020 | 602.4 |
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 |  |