Observation information
- date-obs: 2025-04-27
- time-obs: 19:28:00.650100000
- date-end: 2025-04-27
- time-end: 21:55:53.625700000
- obs_id: A13_090T01_9000006464
- exposure: 4251.21333915
- 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_51826cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51826cztM0_level2_quad_clean.evt
|
Size (bytes) | 860,650,560 | 87,632,640 |
Size | 820.8 MB
| 83.6 MB
|
Events in quadrant A | 4,828,529 | 660,602 |
Events in quadrant B | 9,364,908 | 507,971 |
Events in quadrant C | 4,586,107 | 631,325 |
Events in quadrant D | 12,532,167 | 360,628 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 18 | 0 |
B | 0 | 18 | 0 |
C | 0 | 18 | 0 |
D | 0 | 18 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 146 | 0 |
B | 0 | 146 | 0 |
C | 0 | 146 | 0 |
D | 0 | 146 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19278 | 2 |
B | 0 | 32757 | 2 |
C | 0 | 18608 | 4 |
D | 0 | 42100 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7068 | 183 | 2.589134% |
B | 7068 | 2357 | 33.347482% |
C | 7068 | 280 | 3.961517% |
D | 7068 | 3214 | 45.472552% |
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 | 8873 | 7070 | 127 | 127 | 1.43% | 1.80% |  |
B | 8873 | 7070 | 1563 | 1563 | 17.62% | 22.11% |  |
C | 8873 | 7070 | 213 | 213 | 2.40% | 3.01% |  |
D | 8873 | 7070 | 2847 | 2847 | 32.09% | 40.27% |  |
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 | 11 | 3 | 776768 | 4164.92 | 759 | 741 | 186.3 |
A | 12 | 3 | 364166 | 1950.5 | 759 | 741 | 186.3 |
A | 5 | 240 | 225882 | 1208.33 | 759 | 741 | 186.3 |
B | 15 | 54 | 3831085 | 26735.3 | 663 | 637 | 143.3 |
B | 10 | 128 | 709009 | 4944.21 | 663 | 637 | 143.3 |
B | 5 | 185 | 526104 | 3667.59 | 663 | 637 | 143.3 |
C | 15 | 218 | 466955 | 2273.98 | 740 | 734 | 205.0 |
C | 14 | 245 | 348215 | 1694.83 | 740 | 734 | 205.0 |
C | 14 | 80 | 201717 | 980.29 | 740 | 734 | 205.0 |
D | 11 | 129 | 9031927 | 56219.71 | 573 | 552 | 160.6 |
D | 9 | 49 | 281272 | 1747.46 | 573 | 552 | 160.6 |
D | 3 | 12 | 280791 | 1744.47 | 573 | 552 | 160.6 |
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 |  |