Observation information
- date-obs: 2025-04-02
- time-obs: 10:43:57.453000000
- date-end: 2025-04-02
- time-end: 12:50:49.019900000
- obs_id: A13_090T01_9000006458
- exposure: 4497.55873966
- 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_51449cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51449cztM0_level2_quad_clean.evt
|
Size (bytes) | 825,649,920 | 81,679,680 |
Size | 787.4 MB
| 77.9 MB
|
Events in quadrant A | 9,963,992 | 441,977 |
Events in quadrant B | 5,847,472 | 593,445 |
Events in quadrant C | 10,159,884 | 417,153 |
Events in quadrant D | 4,077,864 | 556,818 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 34183 | 1 |
B | 0 | 22050 | 1 |
C | 0 | 34743 | 1 |
D | 0 | 16866 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 9 | 0 |
B | 0 | 9 | 0 |
C | 0 | 9 | 0 |
D | 0 | 9 | 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 | 6642 | 2270 | 34.176453% |
B | 6643 | 1032 | 15.535150% |
C | 6642 | 2470 | 37.187594% |
D | 6642 | 227 | 3.417645% |
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 | 7612 | 6642 | 2154 | 2154 | 28.30% | 32.43% |  |
B | 7613 | 6643 | 758 | 758 | 9.96% | 11.41% |  |
C | 7612 | 6642 | 2404 | 2404 | 31.58% | 36.19% |  |
D | 7612 | 6642 | 191 | 191 | 2.51% | 2.88% |  |
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 | 7 | 64 | 3432106 | 22492.91 | 619 | 605 | 152.6 |
A | 12 | 3 | 1785765 | 11701.42 | 619 | 605 | 152.6 |
A | 4 | 249 | 979672 | 6417.62 | 619 | 605 | 152.6 |
B | 5 | 185 | 2111780 | 14576.16 | 671 | 647 | 144.8 |
B | 6 | 51 | 223159 | 1536.31 | 671 | 647 | 144.8 |
B | 4 | 206 | 168626 | 1159.8 | 671 | 647 | 144.8 |
C | 4 | 12 | 4961851 | 31474.34 | 577 | 571 | 157.6 |
C | 3 | 233 | 983871 | 6238.05 | 577 | 571 | 157.6 |
C | 15 | 179 | 945797 | 5996.51 | 577 | 571 | 157.6 |
D | 6 | 42 | 813734 | 4245.95 | 693 | 668 | 191.5 |
D | 8 | 176 | 209050 | 1088.2 | 693 | 668 | 191.5 |
D | 13 | 170 | 61598 | 318.19 | 693 | 668 | 191.5 |
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 |  |