Observation information
- date-obs: 2025-04-22
- time-obs: 13:05:11.913900000
- date-end: 2025-04-22
- time-end: 15:16:52.893600000
- obs_id: A13_090T01_9000006464
- exposure: 6663.86585677
- 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_51747cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51747cztM0_level2_quad_clean.evt
|
Size (bytes) | 771,860,160 | 105,667,200 |
Size | 736.1 MB
| 100.8 MB
|
Events in quadrant A | 6,795,759 | 668,902 |
Events in quadrant B | 6,484,347 | 724,866 |
Events in quadrant C | 5,361,604 | 695,378 |
Events in quadrant D | 9,318,664 | 560,584 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 158 | 0 |
B | 0 | 158 | 0 |
C | 0 | 158 | 0 |
D | 0 | 158 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 25431 | 0 |
B | 0 | 24701 | 0 |
C | 0 | 21377 | 0 |
D | 0 | 33184 | 5 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7901 | 749 | 9.479813% |
B | 7902 | 823 | 10.415085% |
C | 7902 | 270 | 3.416856% |
D | 7901 | 1559 | 19.731680% |
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 | 7901 | 7901 | 733 | 733 | 9.28% | 9.28% |  |
B | 7902 | 7902 | 605 | 605 | 7.66% | 7.66% |  |
C | 7902 | 7902 | 248 | 248 | 3.14% | 3.14% |  |
D | 7901 | 7901 | 1442 | 1442 | 18.25% | 18.25% |  |
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 | 8 | 62 | 1480617 | 7289.18 | 828 | 806 | 203.0 |
A | 12 | 3 | 566232 | 2785.15 | 828 | 806 | 203.0 |
A | 8 | 246 | 393874 | 1936.16 | 828 | 806 | 203.0 |
B | 4 | 206 | 1790180 | 10227.99 | 807 | 780 | 175.0 |
B | 4 | 174 | 822023 | 4694.13 | 807 | 780 | 175.0 |
B | 8 | 128 | 130592 | 741.99 | 807 | 780 | 175.0 |
C | 15 | 230 | 288914 | 1276.8 | 825 | 818 | 225.6 |
C | 14 | 245 | 282871 | 1250.01 | 825 | 818 | 225.6 |
C | 15 | 218 | 273219 | 1207.24 | 825 | 818 | 225.6 |
D | 11 | 129 | 4043350 | 18632.27 | 770 | 744 | 217.0 |
D | 8 | 176 | 1126441 | 5188.31 | 770 | 744 | 217.0 |
D | 7 | 159 | 188794 | 866.72 | 770 | 744 | 217.0 |
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 |  |