Observation information
- date-obs: 2025-04-06
- time-obs: 10:13:18.968300000
- date-end: 2025-04-06
- time-end: 12:18:13.944100000
- obs_id: A13_090T01_9000006458
- exposure: 4890.86712509
- 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_51508cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51508cztM0_level2_quad_clean.evt
|
Size (bytes) | 672,664,320 | 87,880,320 |
Size | 641.5 MB
| 83.8 MB
|
Events in quadrant A | 5,091,739 | 572,355 |
Events in quadrant B | 5,237,334 | 629,484 |
Events in quadrant C | 4,039,248 | 578,392 |
Events in quadrant D | 10,030,273 | 428,676 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19374 | 1 |
B | 0 | 19989 | 1 |
C | 0 | 16413 | 1 |
D | 0 | 34312 | 9 |
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 | 6475 | 631 | 9.745174% |
B | 6476 | 561 | 8.662755% |
C | 6476 | 383 | 5.914145% |
D | 6475 | 1871 | 28.895753% |
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 | 7495 | 6476 | 504 | 504 | 6.72% | 7.78% |  |
B | 7496 | 6477 | 309 | 309 | 4.12% | 4.77% |  |
C | 7496 | 6477 | 272 | 272 | 3.63% | 4.20% |  |
D | 7495 | 6476 | 1987 | 1987 | 26.51% | 30.68% |  |
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 | 250 | 970554 | 5702.21 | 695 | 678 | 170.1 |
A | 8 | 43 | 405258 | 2378.65 | 695 | 678 | 170.1 |
A | 7 | 64 | 402835 | 2364.41 | 695 | 678 | 170.1 |
B | 2 | 208 | 938239 | 6292.31 | 692 | 669 | 149.0 |
B | 5 | 172 | 726497 | 4871.25 | 692 | 669 | 149.0 |
B | 15 | 52 | 308594 | 2066.58 | 692 | 669 | 149.0 |
C | 12 | 252 | 461007 | 2471.05 | 681 | 673 | 186.3 |
C | 15 | 1 | 418888 | 2244.96 | 681 | 673 | 186.3 |
C | 13 | 3 | 153139 | 818.43 | 681 | 673 | 186.3 |
D | 8 | 176 | 4155716 | 24366.22 | 613 | 594 | 170.5 |
D | 11 | 176 | 2410157 | 14130.02 | 613 | 594 | 170.5 |
D | 8 | 192 | 295346 | 1728.47 | 613 | 594 | 170.5 |
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 |  |