Observation information
- date-obs: 2025-03-31
- time-obs: 11:52:45.572500000
- date-end: 2025-03-31
- time-end: 13:58:22.548100000
- obs_id: A13_090T01_9000006458
- exposure: 2485.59284371
- 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_51420cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51420cztM0_level2_quad_clean.evt
|
Size (bytes) | 726,687,360 | 82,488,960 |
Size | 693.0 MB
| 78.7 MB
|
Events in quadrant A | 5,524,085 | 575,371 |
Events in quadrant B | 4,244,086 | 661,266 |
Events in quadrant C | 13,120,399 | 239,154 |
Events in quadrant D | 3,503,093 | 565,267 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20871 | 1 |
B | 0 | 17065 | 1 |
C | 0 | 43478 | 1 |
D | 0 | 14960 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 10 | 0 |
C | 0 | 10 | 0 |
D | 0 | 10 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 132 | 0 |
B | 0 | 132 | 0 |
C | 0 | 132 | 0 |
D | 0 | 132 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6547 | 616 | 9.408890% |
B | 6547 | 288 | 4.398961% |
C | 6548 | 4282 | 65.394013% |
D | 6547 | 130 | 1.985642% |
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 | 7537 | 6547 | 369 | 369 | 4.90% | 5.64% |  |
B | 7537 | 6547 | 122 | 122 | 1.62% | 1.86% |  |
C | 7538 | 6548 | 3630 | 3630 | 48.16% | 55.44% |  |
D | 7537 | 6548 | 51 | 51 | 0.68% | 0.78% |  |
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 | 3 | 638622 | 3769.22 | 693 | 678 | 169.3 |
A | 12 | 250 | 614954 | 3629.38 | 693 | 678 | 169.3 |
A | 15 | 174 | 431097 | 2543.08 | 693 | 678 | 169.3 |
B | 5 | 185 | 398208 | 2641.38 | 707 | 681 | 150.5 |
B | 10 | 14 | 277677 | 1840.51 | 707 | 681 | 150.5 |
B | 10 | 254 | 159957 | 1058.31 | 707 | 681 | 150.5 |
C | 15 | 179 | 3172475 | 27171.65 | 422 | 418 | 116.7 |
C | 4 | 12 | 2877722 | 24646.82 | 422 | 418 | 116.7 |
C | 15 | 230 | 2668195 | 22852.02 | 422 | 418 | 116.7 |
D | 3 | 12 | 135504 | 699.49 | 699 | 673 | 192.8 |
D | 2 | 153 | 110759 | 571.12 | 699 | 673 | 192.8 |
D | 7 | 96 | 91647 | 471.96 | 699 | 673 | 192.8 |
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 |  |