Observation information
- date-obs: 2025-04-23
- time-obs: 11:36:00.685600000
- date-end: 2025-04-23
- time-end: 13:50:09.663700000
- obs_id: A13_090T01_9000006464
- exposure: 3634.51704681
- 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_51761cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51761cztM0_level2_quad_clean.evt
|
Size (bytes) | 869,112,000 | 101,917,440 |
Size | 828.8 MB
| 97.2 MB
|
Events in quadrant A | 5,709,432 | 744,790 |
Events in quadrant B | 6,475,480 | 770,836 |
Events in quadrant C | 4,734,655 | 699,905 |
Events in quadrant D | 14,628,287 | 310,694 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 160 | 0 |
B | 0 | 160 | 0 |
C | 0 | 160 | 0 |
D | 0 | 160 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22508 | 0 |
B | 0 | 24813 | 0 |
C | 0 | 19906 | 0 |
D | 0 | 49054 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8049 | 140 | 1.739347% |
B | 8049 | 664 | 8.249472% |
C | 8050 | 396 | 4.919255% |
D | 8050 | 4724 | 58.683230% |
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 | 8049 | 8049 | 51 | 51 | 0.63% | 0.63% |  |
B | 8049 | 8049 | 414 | 414 | 5.14% | 5.14% |  |
C | 8050 | 8050 | 333 | 333 | 4.14% | 4.14% |  |
D | 8050 | 8050 | 3616 | 3616 | 44.92% | 44.92% |  |
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 | 1286468 | 5947.02 | 885 | 864 | 216.2 |
A | 5 | 240 | 157346 | 723.86 | 885 | 864 | 216.2 |
A | 12 | 194 | 155574 | 715.67 | 885 | 864 | 216.2 |
B | 4 | 206 | 1854789 | 9853.83 | 862 | 830 | 188.1 |
B | 10 | 44 | 294775 | 1562.32 | 862 | 830 | 188.1 |
B | 0 | 213 | 192436 | 1018.39 | 862 | 830 | 188.1 |
C | 13 | 3 | 844412 | 3690.73 | 840 | 834 | 228.6 |
C | 14 | 245 | 185711 | 808.85 | 840 | 834 | 228.6 |
C | 3 | 233 | 77147 | 333.88 | 840 | 834 | 228.6 |
D | 11 | 129 | 11032800 | 70197.9 | 558 | 539 | 157.2 |
D | 8 | 176 | 414880 | 2636.44 | 558 | 539 | 157.2 |
D | 7 | 159 | 285637 | 1814.07 | 558 | 539 | 157.2 |
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 |  |