Observation information
- date-obs: 2025-04-05
- time-obs: 11:34:53.219400000
- date-end: 2025-04-05
- time-end: 13:44:23.194500000
- obs_id: A13_090T01_9000006458
- exposure: 4752.77781194
- 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_51494cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51494cztM0_level2_quad_clean.evt
|
Size (bytes) | 809,133,120 | 89,055,360 |
Size | 771.6 MB
| 84.9 MB
|
Events in quadrant A | 5,228,283 | 630,314 |
Events in quadrant B | 7,312,140 | 579,783 |
Events in quadrant C | 5,940,250 | 591,991 |
Events in quadrant D | 10,952,382 | 425,847 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19895 | 1 |
B | 0 | 26421 | 1 |
C | 0 | 22397 | 1 |
D | 0 | 37248 | 1 |
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 | 136 | 0 |
B | 0 | 136 | 0 |
C | 0 | 136 | 0 |
D | 0 | 136 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6710 | 454 | 6.766021% |
B | 6711 | 1456 | 21.695723% |
C | 6711 | 657 | 9.789897% |
D | 6711 | 2332 | 34.748920% |
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 | 7770 | 6710 | 258 | 258 | 3.32% | 3.85% |  |
B | 7771 | 6711 | 884 | 884 | 11.38% | 13.17% |  |
C | 7771 | 6711 | 610 | 610 | 7.85% | 9.09% |  |
D | 7771 | 6711 | 2331 | 2331 | 30.00% | 34.73% |  |
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 | 1336628 | 7426.6 | 737 | 719 | 179.9 |
A | 12 | 3 | 206540 | 1144.2 | 737 | 719 | 179.9 |
A | 8 | 43 | 133649 | 738.99 | 737 | 719 | 179.9 |
B | 4 | 81 | 3816478 | 25670.57 | 694 | 670 | 148.6 |
B | 8 | 234 | 277106 | 1859.7 | 694 | 670 | 148.6 |
B | 5 | 185 | 66770 | 444.68 | 694 | 670 | 148.6 |
C | 9 | 38 | 2608351 | 13317.24 | 712 | 707 | 195.8 |
C | 13 | 3 | 96549 | 489.47 | 712 | 707 | 195.8 |
C | 15 | 215 | 77327 | 391.3 | 712 | 707 | 195.8 |
D | 8 | 176 | 5304523 | 30475.07 | 627 | 604 | 174.0 |
D | 11 | 176 | 2575665 | 14795.7 | 627 | 604 | 174.0 |
D | 1 | 3 | 140913 | 806.18 | 627 | 604 | 174.0 |
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 |  |