Observation information
- date-obs: 2025-04-27
- time-obs: 05:54:03.777700000
- date-end: 2025-04-27
- time-end: 08:00:13.757700000
- obs_id: A13_090T01_9000006464
- exposure: 4425.62318838
- sourceid: 4U 1755-338
- observer: arbind2196
- ra_pnt: 269.6667
- dec_pnt: -33.8075
Basic statistics of files
Param |
Original file |
Final file |
Filename | modeM0/AS1A13_090T01_9000006464_51817cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51817cztM0_level2_quad_clean.evt
|
Size (bytes) | 648,083,520 | 92,410,560 |
Size | 618.1 MB
| 88.1 MB
|
Events in quadrant A | 4,391,323 | 633,707 |
Events in quadrant B | 4,198,582 | 694,987 |
Events in quadrant C | 4,310,646 | 608,014 |
Events in quadrant D | 10,555,524 | 382,148 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 7 | 0 |
B | 0 | 7 | 0 |
C | 0 | 7 | 0 |
D | 0 | 7 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 138 | 0 |
B | 0 | 138 | 0 |
C | 0 | 138 | 0 |
D | 0 | 138 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 17743 | 1 |
B | 0 | 17144 | 1 |
C | 0 | 17636 | 1 |
D | 0 | 36115 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6880 | 210 | 3.052326% |
B | 6881 | 235 | 3.415201% |
C | 6880 | 340 | 4.941860% |
D | 6880 | 2696 | 39.186047% |
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 | 7570 | 6881 | 46 | 46 | 0.61% | 0.67% |  |
B | 7571 | 6882 | 37 | 37 | 0.49% | 0.54% |  |
C | 7570 | 6881 | 219 | 219 | 2.89% | 3.18% |  |
D | 7570 | 6881 | 2328 | 2328 | 30.75% | 33.83% |  |
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 | 4 | 175 | 414106 | 2252.36 | 750 | 731 | 183.5 |
A | 15 | 174 | 337136 | 1832.97 | 750 | 731 | 183.5 |
A | 12 | 3 | 232199 | 1261.2 | 750 | 731 | 183.5 |
B | 1 | 207 | 292102 | 1825.58 | 742 | 715 | 159.6 |
B | 4 | 81 | 194282 | 1212.72 | 742 | 715 | 159.6 |
B | 0 | 171 | 119939 | 746.96 | 742 | 715 | 159.6 |
C | 15 | 218 | 450656 | 2249.14 | 728 | 723 | 200.0 |
C | 12 | 254 | 314569 | 1568.86 | 728 | 723 | 200.0 |
C | 15 | 224 | 112677 | 559.64 | 728 | 723 | 200.0 |
D | 11 | 129 | 6631922 | 39670.26 | 601 | 580 | 167.2 |
D | 0 | 18 | 1098367 | 6567.22 | 601 | 580 | 167.2 |
D | 3 | 12 | 155101 | 924.38 | 601 | 580 | 167.2 |
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 |  |