Observation information
- date-obs: 2025-04-22
- time-obs: 09:36:12.946700000
- date-end: 2025-04-22
- time-end: 11:50:41.925200000
- obs_id: A13_090T01_9000006464
- exposure: 6442.86499202
- 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_51745cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51745cztM0_level2_quad_clean.evt
|
Size (bytes) | 737,101,440 | 104,091,840 |
Size | 703.0 MB
| 99.3 MB
|
Events in quadrant A | 4,732,383 | 699,592 |
Events in quadrant B | 4,845,546 | 745,718 |
Events in quadrant C | 8,672,808 | 618,472 |
Events in quadrant D | 8,438,230 | 551,720 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 3 | 0 |
B | 0 | 3 | 0 |
C | 0 | 3 | 0 |
D | 0 | 3 | 0 |
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 | 19273 | 2 |
B | 0 | 19603 | 2 |
C | 0 | 31054 | 2 |
D | 0 | 30361 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7699 | 341 | 4.429147% |
B | 7700 | 483 | 6.272727% |
C | 7700 | 1208 | 15.688312% |
D | 7700 | 1529 | 19.857143% |
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 | 8069 | 7700 | 66 | 66 | 0.82% | 0.86% |  |
B | 8070 | 7701 | 118 | 118 | 1.46% | 1.53% |  |
C | 8070 | 7701 | 1059 | 1059 | 13.12% | 13.75% |  |
D | 8070 | 7701 | 1248 | 1248 | 15.46% | 16.21% |  |
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 | 4 | 175 | 417221 | 1983.16 | 865 | 843 | 210.0 |
A | 5 | 240 | 115702 | 547.06 | 865 | 843 | 210.0 |
A | 12 | 3 | 112550 | 532.05 | 865 | 843 | 210.0 |
B | 7 | 0 | 320655 | 1730.08 | 844 | 811 | 184.9 |
B | 5 | 32 | 216976 | 1169.27 | 844 | 811 | 184.9 |
B | 1 | 223 | 174194 | 937.85 | 844 | 811 | 184.9 |
C | 10 | 171 | 3208679 | 14363.51 | 812 | 805 | 223.3 |
C | 9 | 38 | 512239 | 2289.99 | 812 | 805 | 223.3 |
C | 13 | 3 | 398774 | 1781.94 | 812 | 805 | 223.3 |
D | 11 | 129 | 4299979 | 19663.11 | 790 | 761 | 218.6 |
D | 8 | 176 | 478615 | 2185.54 | 790 | 761 | 218.6 |
D | 11 | 176 | 172668 | 786.24 | 790 | 761 | 218.6 |
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 |  |