Observation information
- date-obs: 2025-04-24
- time-obs: 20:17:37.354300000
- date-end: 2025-04-24
- time-end: 22:46:30.327700000
- obs_id: A13_090T01_9000006464
- exposure: 5956.25201678
- 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_51781cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51781cztM0_level2_quad_clean.evt
|
Size (bytes) | 657,760,320 | 101,194,560 |
Size | 627.3 MB
| 96.5 MB
|
Events in quadrant A | 5,036,773 | 682,032 |
Events in quadrant B | 5,655,646 | 717,558 |
Events in quadrant C | 4,418,891 | 646,453 |
Events in quadrant D | 8,675,379 | 512,568 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 16 | 0 |
B | 0 | 16 | 0 |
C | 0 | 16 | 0 |
D | 0 | 16 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 150 | 0 |
B | 0 | 150 | 0 |
C | 0 | 150 | 0 |
D | 0 | 150 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19888 | 2 |
B | 0 | 21725 | 2 |
C | 0 | 18141 | 2 |
D | 0 | 30835 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7253 | 91 | 1.254653% |
B | 7254 | 433 | 5.969120% |
C | 7254 | 221 | 3.046595% |
D | 7254 | 1556 | 21.450234% |
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 | 8933 | 7255 | 52 | 52 | 0.58% | 0.72% |  |
B | 8934 | 7256 | 252 | 252 | 2.82% | 3.47% |  |
C | 8934 | 7256 | 163 | 163 | 1.82% | 2.25% |  |
D | 8933 | 7254 | 1421 | 1421 | 15.91% | 19.59% |  |
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 | 914123 | 4774.67 | 779 | 760 | 191.3 |
A | 3 | 14 | 148069 | 770.07 | 779 | 760 | 191.3 |
A | 2 | 143 | 130542 | 678.44 | 779 | 760 | 191.3 |
B | 4 | 206 | 1116075 | 6746.38 | 767 | 741 | 165.3 |
B | 4 | 174 | 447907 | 2704.8 | 767 | 741 | 165.3 |
B | 10 | 44 | 276174 | 1666.03 | 767 | 741 | 165.3 |
C | 9 | 38 | 210401 | 1015.94 | 758 | 753 | 206.4 |
C | 15 | 218 | 191340 | 923.57 | 758 | 753 | 206.4 |
C | 14 | 245 | 165631 | 798.99 | 758 | 753 | 206.4 |
D | 11 | 129 | 4483307 | 23389.9 | 684 | 659 | 191.6 |
D | 3 | 12 | 1096967 | 5720.4 | 684 | 659 | 191.6 |
D | 8 | 176 | 103788 | 538.11 | 684 | 659 | 191.6 |
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 |  |