Observation information
- date-obs: 2025-04-27
- time-obs: 13:50:09.703900000
- date-end: 2025-04-27
- time-end: 18:30:20.659300000
- obs_id: A13_090T01_9000006464
- exposure: 8380.41715956
- 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_51823cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51823cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,728,028,800 | 171,028,800 |
Size | 1.6 GB
| 163.1 MB
|
Events in quadrant A | 9,568,282 | 1,292,952 |
Events in quadrant B | 20,272,683 | 937,508 |
Events in quadrant C | 9,156,017 | 1,238,424 |
Events in quadrant D | 23,836,731 | 694,298 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 12 | 1 |
B | 0 | 12 | 1 |
C | 0 | 11 | 0 |
D | 0 | 12 | 2 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 317 | 12 |
B | 0 | 316 | 11 |
C | 0 | 319 | 8 |
D | 0 | 320 | 16 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 41172 | 2750 |
B | 0 | 73725 | 3291 |
C | 0 | 40092 | 2468 |
D | 0 | 86176 | 5309 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 14745 | 582 | 3.947101% |
B | 14662 | 5564 | 37.948438% |
C | 14745 | 518 | 3.513055% |
D | 14525 | 6568 | 45.218589% |
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 | 16811 | 15060 | 160 | 160 | 0.95% | 1.06% |  |
B | 16812 | 15037 | 4082 | 4082 | 24.28% | 27.15% |  |
C | 16812 | 15045 | 255 | 255 | 1.52% | 1.69% |  |
D | 16811 | 14906 | 5109 | 5109 | 30.39% | 34.27% |  |
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 | 3 | 14 | 622857 | 1560.13 | 1615 | 1575 | 398.2 |
A | 12 | 3 | 488359 | 1222.39 | 1615 | 1575 | 398.2 |
A | 3 | 22 | 459804 | 1150.68 | 1615 | 1575 | 398.2 |
B | 5 | 172 | 8817629 | 30989.9 | 1322 | 1273 | 284.5 |
B | 10 | 128 | 2102283 | 7385.15 | 1322 | 1273 | 284.5 |
B | 1 | 223 | 2077365 | 7297.56 | 1322 | 1273 | 284.5 |
C | 15 | 218 | 1080109 | 2493.82 | 1573 | 1560 | 432.5 |
C | 14 | 245 | 388812 | 895.4 | 1573 | 1560 | 432.5 |
C | 10 | 252 | 228693 | 525.18 | 1573 | 1560 | 432.5 |
D | 11 | 129 | 10782940 | 33748.13 | 1149 | 1109 | 319.5 |
D | 11 | 176 | 2911647 | 9110.25 | 1149 | 1109 | 319.5 |
D | 3 | 12 | 2812809 | 8800.88 | 1149 | 1109 | 319.5 |
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 |  |