Observation information
- date-obs: 2025-04-21
- time-obs: 09:10:28.189400000
- date-end: 2025-04-21
- time-end: 11:31:18.165700000
- obs_id: A13_090T01_9000006464
- exposure: 3644.51449591
- 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_9000006464_51730cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51730cztM0_level2_quad_clean.evt
|
Size (bytes) | 782,726,400 | 95,685,120 |
Size | 746.5 MB
| 91.3 MB
|
Events in quadrant A | 6,172,801 | 669,782 |
Events in quadrant B | 5,008,559 | 734,279 |
Events in quadrant C | 4,456,253 | 667,565 |
Events in quadrant D | 12,765,925 | 313,136 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 152 | 0 |
B | 0 | 152 | 0 |
C | 0 | 152 | 0 |
D | 0 | 152 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 23458 | 3 |
B | 0 | 19854 | 3 |
C | 0 | 18395 | 3 |
D | 0 | 42985 | 3 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7357 | 636 | 8.644828% |
B | 7357 | 454 | 6.170994% |
C | 7357 | 378 | 5.137964% |
D | 7357 | 4038 | 54.886503% |
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 | 7992 | 7358 | 304 | 304 | 3.80% | 4.13% |  |
B | 7992 | 7358 | 121 | 121 | 1.51% | 1.64% |  |
C | 7992 | 7359 | 182 | 182 | 2.28% | 2.47% |  |
D | 7992 | 7357 | 3535 | 3535 | 44.23% | 48.05% |  |
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 | 1048030 | 5113.71 | 829 | 807 | 204.8 |
A | 4 | 175 | 1007870 | 4917.6 | 829 | 807 | 204.8 |
A | 11 | 3 | 207567 | 1009.63 | 829 | 807 | 204.8 |
B | 5 | 172 | 328772 | 1847.53 | 815 | 786 | 177.5 |
B | 10 | 254 | 325576 | 1829.53 | 815 | 786 | 177.5 |
B | 1 | 255 | 123096 | 688.97 | 815 | 786 | 177.5 |
C | 15 | 231 | 219959 | 987.93 | 805 | 797 | 221.8 |
C | 13 | 3 | 215689 | 968.69 | 805 | 797 | 221.8 |
C | 12 | 250 | 206887 | 929.01 | 805 | 797 | 221.8 |
D | 11 | 129 | 9930793 | 62907.49 | 563 | 542 | 157.9 |
D | 8 | 176 | 260225 | 1645.07 | 563 | 542 | 157.9 |
D | 2 | 249 | 152057 | 959.84 | 563 | 542 | 157.9 |
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 |  |