Observation information
- date-obs: 2025-04-02
- time-obs: 17:23:52.966400000
- date-end: 2025-04-02
- time-end: 19:43:14.940700000
- obs_id: A13_090T01_9000006458
- exposure: 5424.46499836
- 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_9000006458_51453cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51453cztM0_level2_quad_clean.evt
|
Size (bytes) | 589,106,880 | 92,903,040 |
Size | 561.8 MB
| 88.6 MB
|
Events in quadrant A | 6,858,378 | 573,652 |
Events in quadrant B | 3,657,619 | 689,483 |
Events in quadrant C | 6,450,287 | 512,113 |
Events in quadrant D | 4,321,195 | 571,217 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 24925 | 2 |
B | 0 | 15477 | 2 |
C | 0 | 23866 | 3 |
D | 0 | 17587 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 16 | 0 |
B | 0 | 17 | 0 |
C | 0 | 17 | 0 |
D | 0 | 17 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 136 | 0 |
B | 0 | 136 | 0 |
C | 0 | 136 | 0 |
D | 0 | 136 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6691 | 1050 | 15.692722% |
B | 6691 | 225 | 3.362726% |
C | 6690 | 1344 | 20.089686% |
D | 6690 | 285 | 4.260090% |
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 | 7686 | 6692 | 846 | 846 | 11.01% | 12.64% |  |
B | 7686 | 6692 | 30 | 30 | 0.39% | 0.45% |  |
C | 7685 | 6691 | 1246 | 1246 | 16.21% | 18.62% |  |
D | 7685 | 6691 | 173 | 173 | 2.25% | 2.59% |  |
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 | 7 | 64 | 2310682 | 13556.57 | 692 | 674 | 170.4 |
A | 12 | 3 | 643581 | 3772.98 | 692 | 674 | 170.4 |
A | 3 | 130 | 415600 | 2435.04 | 692 | 674 | 170.4 |
B | 4 | 206 | 195526 | 1251.29 | 730 | 704 | 155.7 |
B | 0 | 171 | 127645 | 815.31 | 730 | 704 | 155.7 |
B | 15 | 52 | 93790 | 597.87 | 730 | 704 | 155.7 |
C | 4 | 12 | 1300555 | 7393.97 | 642 | 637 | 175.8 |
C | 15 | 179 | 1300173 | 7391.79 | 642 | 637 | 175.8 |
C | 1 | 60 | 610162 | 3466.99 | 642 | 637 | 175.8 |
D | 8 | 176 | 625836 | 3209.51 | 699 | 672 | 194.8 |
D | 11 | 176 | 344885 | 1767.14 | 699 | 672 | 194.8 |
D | 10 | 181 | 211022 | 1079.91 | 699 | 672 | 194.8 |
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 |  |