Observation information
- date-obs: 2025-04-26
- time-obs: 09:05:55.982200000
- date-end: 2025-04-26
- time-end: 11:16:32.961500000
- obs_id: A13_090T01_9000006464
- exposure: 6453.21480083
- 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_51804cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51804cztM0_level2_quad_clean.evt
|
Size (bytes) | 909,221,760 | 104,232,960 |
Size | 867.1 MB
| 99.4 MB
|
Events in quadrant A | 8,555,922 | 692,714 |
Events in quadrant B | 8,561,599 | 684,839 |
Events in quadrant C | 6,875,699 | 679,793 |
Events in quadrant D | 9,059,404 | 553,475 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 156 | 0 |
B | 0 | 156 | 0 |
C | 0 | 156 | 0 |
D | 0 | 156 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 31026 | 1 |
B | 0 | 30799 | 0 |
C | 0 | 25869 | 0 |
D | 0 | 32314 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7836 | 535 | 6.827463% |
B | 7837 | 1417 | 18.080898% |
C | 7837 | 454 | 5.793033% |
D | 7837 | 1584 | 20.211816% |
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 | 7836 | 7836 | 327 | 327 | 4.17% | 4.17% |  |
B | 7837 | 7837 | 1106 | 1106 | 14.11% | 14.11% |  |
C | 7837 | 7837 | 303 | 303 | 3.87% | 3.87% |  |
D | 7837 | 7837 | 1529 | 1529 | 19.51% | 19.51% |  |
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 | 3398252 | 16559.38 | 842 | 824 | 205.2 |
A | 12 | 194 | 393080 | 1911.89 | 842 | 824 | 205.2 |
A | 11 | 3 | 291120 | 1414.93 | 842 | 824 | 205.2 |
B | 10 | 44 | 2310731 | 13112.41 | 814 | 784 | 176.2 |
B | 10 | 128 | 1698669 | 9638.04 | 814 | 784 | 176.2 |
B | 4 | 206 | 473912 | 2685.71 | 814 | 784 | 176.2 |
C | 10 | 22 | 1603484 | 7155.36 | 824 | 816 | 224.0 |
C | 13 | 3 | 484800 | 2160.82 | 824 | 816 | 224.0 |
C | 15 | 218 | 339815 | 1513.51 | 824 | 816 | 224.0 |
D | 11 | 129 | 4879142 | 23728.27 | 748 | 724 | 205.6 |
D | 0 | 18 | 481000 | 2336.03 | 748 | 724 | 205.6 |
D | 8 | 176 | 352480 | 1710.92 | 748 | 724 | 205.6 |
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 |  |