Observation information
- date-obs: 2025-04-08
- time-obs: 17:41:16.346800000
- date-end: 2025-04-08
- time-end: 19:46:14.323700000
- obs_id: A13_090T01_9000006458
- exposure: 2252.56977743
- 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_9000006458_51542cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51542cztM0_level2_quad_clean.evt
|
Size (bytes) | 859,723,200 | 89,821,440 |
Size | 819.9 MB
| 85.7 MB
|
Events in quadrant A | 5,148,086 | 681,942 |
Events in quadrant B | 6,034,783 | 682,126 |
Events in quadrant C | 4,135,233 | 654,081 |
Events in quadrant D | 15,934,770 | 188,312 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20468 | 2 |
B | 0 | 23053 | 3 |
C | 0 | 17551 | 2 |
D | 0 | 52449 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 1 | 0 |
B | 0 | 1 | 0 |
C | 0 | 1 | 0 |
D | 0 | 1 | 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 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7369 | 312 | 4.233953% |
B | 7368 | 858 | 11.644951% |
C | 7368 | 263 | 3.569490% |
D | 7368 | 5378 | 72.991314% |
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 | 7499 | 7371 | 128 | 128 | 1.71% | 1.74% |  |
B | 7497 | 7369 | 496 | 496 | 6.62% | 6.73% |  |
C | 7498 | 7370 | 142 | 142 | 1.89% | 1.93% |  |
D | 7498 | 7368 | 5036 | 5036 | 67.16% | 68.35% |  |
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 | 904595 | 4565.37 | 807 | 786 | 198.0 |
A | 12 | 250 | 336922 | 1697.91 | 807 | 786 | 198.0 |
A | 4 | 175 | 155580 | 781.9 | 807 | 786 | 198.0 |
B | 10 | 44 | 1817143 | 10763.63 | 777 | 750 | 168.8 |
B | 15 | 52 | 328131 | 1940.0 | 777 | 750 | 168.8 |
B | 7 | 252 | 128449 | 756.72 | 777 | 750 | 168.8 |
C | 13 | 3 | 435148 | 2037.17 | 781 | 775 | 213.2 |
C | 14 | 224 | 158743 | 740.86 | 781 | 775 | 213.2 |
C | 3 | 233 | 99247 | 461.82 | 781 | 775 | 213.2 |
D | 8 | 176 | 13498886 | 115287.11 | 416 | 400 | 117.1 |
D | 12 | 6 | 363409 | 3100.36 | 416 | 400 | 117.1 |
D | 8 | 160 | 75671 | 642.87 | 416 | 400 | 117.1 |
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 |  |