Observation information
- date-obs: 2025-04-22
- time-obs: 06:02:07.982900000
- date-end: 2025-04-22
- time-end: 08:14:52.960600000
- obs_id: A13_090T01_9000006464
- exposure: 5646.09259498
- 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_51743cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51743cztM0_level2_quad_clean.evt
|
Size (bytes) | 587,229,120 | 93,461,760 |
Size | 560.0 MB
| 89.1 MB
|
Events in quadrant A | 5,119,460 | 612,587 |
Events in quadrant B | 3,957,279 | 674,793 |
Events in quadrant C | 5,780,057 | 582,716 |
Events in quadrant D | 6,377,803 | 507,053 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 14 | 0 |
B | 0 | 15 | 0 |
C | 0 | 15 | 0 |
D | 0 | 15 | 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 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19667 | 2 |
B | 0 | 16199 | 3 |
C | 0 | 21631 | 2 |
D | 0 | 23438 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6491 | 373 | 5.746418% |
B | 6490 | 287 | 4.422188% |
C | 6490 | 541 | 8.335901% |
D | 6490 | 986 | 15.192604% |
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 | 7506 | 6492 | 225 | 225 | 3.00% | 3.47% |  |
B | 7505 | 6491 | 106 | 106 | 1.41% | 1.63% |  |
C | 7505 | 6491 | 398 | 398 | 5.30% | 6.13% |  |
D | 7505 | 6491 | 832 | 832 | 11.09% | 12.82% |  |
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 | 4 | 175 | 754436 | 4200.94 | 727 | 708 | 179.4 |
A | 12 | 3 | 486204 | 2705.93 | 727 | 708 | 179.4 |
A | 11 | 3 | 266139 | 1479.39 | 727 | 708 | 179.4 |
B | 1 | 223 | 176538 | 1138.94 | 719 | 696 | 154.4 |
B | 5 | 32 | 132762 | 855.4 | 719 | 696 | 154.4 |
B | 4 | 174 | 101664 | 653.98 | 719 | 696 | 154.4 |
C | 10 | 171 | 1120322 | 5826.84 | 699 | 694 | 192.2 |
C | 13 | 3 | 418590 | 2174.84 | 699 | 694 | 192.2 |
C | 15 | 230 | 394578 | 2049.87 | 699 | 694 | 192.2 |
D | 11 | 129 | 3233483 | 17343.22 | 672 | 649 | 186.4 |
D | 11 | 176 | 74909 | 398.38 | 672 | 649 | 186.4 |
D | 2 | 249 | 71297 | 379.01 | 672 | 649 | 186.4 |
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 |  |