Observation information
- date-obs: 2025-04-22
- time-obs: 04:56:14.994800000
- date-end: 2025-04-22
- time-end: 06:53:36.973600000
- obs_id: A13_090T01_9000006464
- exposure: 3496.9994086
- 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_51922cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51922cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,095,865,920 | 74,289,600 |
Size | 1.0 GB
| 70.8 MB
|
Events in quadrant A | 13,326,942 | 314,111 |
Events in quadrant B | 5,345,557 | 666,723 |
Events in quadrant C | 10,258,683 | 432,509 |
Events in quadrant D | 11,090,876 | 344,895 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 140 | 0 |
B | 0 | 140 | 0 |
C | 0 | 140 | 0 |
D | 0 | 140 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 44468 | 0 |
B | 0 | 20805 | 0 |
C | 0 | 35338 | 0 |
D | 0 | 37795 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7043 | 3851 | 54.678404% |
B | 7043 | 542 | 7.695584% |
C | 7043 | 2516 | 35.723413% |
D | 7043 | 3140 | 44.583274% |
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 | 7043 | 7043 | 3743 | 3743 | 53.14% | 53.14% |  |
B | 7043 | 7043 | 351 | 351 | 4.98% | 4.98% |  |
C | 7043 | 7043 | 2318 | 2318 | 32.91% | 32.91% |  |
D | 7043 | 7043 | 2892 | 2892 | 41.06% | 41.06% |  |
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 | 248 | 8375147 | 59745.23 | 564 | 551 | 140.2 |
A | 3 | 95 | 605897 | 4318.6 | 564 | 551 | 140.2 |
A | 12 | 3 | 559005 | 3984.07 | 564 | 551 | 140.2 |
B | 5 | 185 | 649821 | 4309.5 | 710 | 686 | 150.6 |
B | 12 | 32 | 557245 | 3694.9 | 710 | 686 | 150.6 |
B | 10 | 44 | 303066 | 2007.45 | 710 | 686 | 150.6 |
C | 15 | 224 | 5601344 | 34355.96 | 595 | 590 | 163.0 |
C | 15 | 158 | 606504 | 3716.78 | 595 | 590 | 163.0 |
C | 13 | 3 | 305845 | 1872.49 | 595 | 590 | 163.0 |
D | 12 | 17 | 5186943 | 35832.95 | 506 | 484 | 144.7 |
D | 6 | 42 | 1256105 | 8675.01 | 506 | 484 | 144.7 |
D | 7 | 60 | 384403 | 2652.47 | 506 | 484 | 144.7 |
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 |  |