Observation information
- date-obs: 2015-11-25
- time-obs: 18-37-26.000007713
- date-end: 2015-11-26
- time-end: 04-02-47.000000521
- obs_id: P01_171T01_9000000126
- exposure: 21481.577377
- 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_9000000126cztM0_level2.evt
| modeM0/AS1P01_171T01_9000000126cztM0_level2_quad_clean.evt
|
Size (bytes) | 5,048,654,400 | 391,161,600 |
Size | 4.7 GB
| 373.0 MB
|
Events in quadrant A | 37,151,920 | 2,450,690 |
Events in quadrant B | 40,332,060 | 2,487,249 |
Events in quadrant C | 37,172,812 | 2,430,144 |
Events in quadrant D | 36,203,554 | 2,351,978 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 132355 | 0 |
B | 0 | 141827 | 0 |
C | 0 | 132400 | 0 |
D | 0 | 129586 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 626 | 0 |
B | 0 | 626 | 0 |
C | 0 | 626 | 0 |
D | 0 | 626 | 0 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 30 | 0 |
B | 0 | 30 | 0 |
C | 0 | 30 | 0 |
D | 0 | 30 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 30962 | 75 | 0.242232% |
B | 30962 | 433 | 1.398488% |
C | 30962 | 52 | 0.167948% |
D | 30962 | 416 | 1.343582% |
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 | 33923 | 30964 | 1309 | 1309 | 3.86% | 4.23% |  |
B | 33923 | 30965 | 2376 | 2376 | 7.00% | 7.67% |  |
C | 33923 | 30966 | 1309 | 1309 | 3.86% | 4.23% |  |
D | 33923 | 30966 | 1479 | 1479 | 4.36% | 4.78% |  |
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 | 73741 | 27.5 | 9662 | 9731 | 2328.0 |
A | 11 | 79 | 41015 | 13.44 | 9662 | 9731 | 2328.0 |
A | 3 | 111 | 30281 | 8.83 | 9662 | 9731 | 2328.0 |
B | 7 | 221 | 1088676 | 459.18 | 10051 | 10109 | 2348.9 |
B | 0 | 184 | 364525 | 150.89 | 10051 | 10109 | 2348.9 |
B | 0 | 220 | 341867 | 141.24 | 10051 | 10109 | 2348.9 |
C | 1 | 192 | 860715 | 330.53 | 9217 | 9561 | 2575.1 |
C | 3 | 111 | 123608 | 44.29 | 9217 | 9561 | 2575.1 |
C | 3 | 79 | 76684 | 26.07 | 9217 | 9561 | 2575.1 |
D | 12 | 22 | 1082430 | 391.49 | 8880 | 9217 | 2741.4 |
D | 1 | 4 | 733242 | 264.11 | 8880 | 9217 | 2741.4 |
D | 13 | 169 | 556678 | 199.7 | 8880 | 9217 | 2741.4 |
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 |  |