Observation information
- date-obs: 2025-04-27
- time-obs: 17:48:30.666400000
- date-end: 2025-04-27
- time-end: 20:12:33.642600000
- obs_id: A13_090T01_9000006464
- exposure: 3762.11894834
- 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_51824cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51824cztM0_level2_quad_clean.evt
|
Size (bytes) | 810,552,960 | 90,849,600 |
Size | 773.0 MB
| 86.6 MB
|
Events in quadrant A | 4,398,285 | 663,411 |
Events in quadrant B | 7,134,340 | 637,078 |
Events in quadrant C | 4,648,233 | 632,177 |
Events in quadrant D | 13,265,460 | 315,702 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 14 | 0 |
B | 0 | 14 | 0 |
C | 0 | 14 | 0 |
D | 0 | 14 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 150 | 0 |
B | 0 | 150 | 0 |
C | 0 | 150 | 0 |
D | 0 | 150 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 18176 | 2 |
B | 0 | 26214 | 2 |
C | 0 | 19041 | 2 |
D | 0 | 44340 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7203 | 121 | 1.679856% |
B | 7203 | 1173 | 16.284881% |
C | 7203 | 307 | 4.262113% |
D | 7203 | 3816 | 52.977926% |
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 | 8643 | 7205 | 42 | 42 | 0.49% | 0.58% |  |
B | 8643 | 7205 | 600 | 600 | 6.94% | 8.33% |  |
C | 8643 | 7205 | 216 | 216 | 2.50% | 3.00% |  |
D | 8643 | 7205 | 3103 | 3103 | 35.90% | 43.07% |  |
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 | 3 | 240373 | 1251.58 | 779 | 760 | 191.4 |
A | 3 | 14 | 196813 | 1024.05 | 779 | 760 | 191.4 |
A | 5 | 240 | 165340 | 859.65 | 779 | 760 | 191.4 |
B | 10 | 128 | 1392693 | 8801.75 | 731 | 704 | 158.1 |
B | 1 | 223 | 958203 | 6054.4 | 731 | 704 | 158.1 |
B | 5 | 185 | 378245 | 2387.25 | 731 | 704 | 158.1 |
C | 15 | 218 | 709982 | 3433.92 | 751 | 745 | 206.5 |
C | 14 | 245 | 320059 | 1546.03 | 751 | 745 | 206.5 |
C | 0 | 192 | 191924 | 925.63 | 751 | 745 | 206.5 |
D | 11 | 129 | 9306274 | 60843.59 | 549 | 530 | 152.9 |
D | 3 | 12 | 658633 | 4302.86 | 549 | 530 | 152.9 |
D | 0 | 18 | 403384 | 2633.97 | 549 | 530 | 152.9 |
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 |  |