Observation information
- date-obs: 2025-04-28
- time-obs: 06:12:02.543200000
- date-end: 2025-04-28
- time-end: 07:15:00.532200000
- obs_id: A13_090T01_9000006464
- exposure: 1820.15447593
- 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_51832cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51832cztM0_level2_quad_clean.evt
|
Size (bytes) | 406,278,720 | 48,142,080 |
Size | 387.5 MB
| 45.9 MB
|
Events in quadrant A | 2,340,084 | 342,315 |
Events in quadrant B | 2,763,053 | 362,023 |
Events in quadrant C | 2,412,454 | 332,860 |
Events in quadrant D | 7,229,042 | 153,145 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 76 | 0 |
B | 0 | 76 | 0 |
C | 0 | 76 | 0 |
D | 0 | 76 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 9473 | 0 |
B | 0 | 10841 | 0 |
C | 0 | 9917 | 0 |
D | 0 | 24068 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 3779 | 48 | 1.270177% |
B | 3779 | 201 | 5.318867% |
C | 3779 | 126 | 3.334215% |
D | 3779 | 2136 | 56.522890% |
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 | 3779 | 3779 | 36 | 36 | 0.95% | 0.95% |  |
B | 3779 | 3779 | 137 | 137 | 3.63% | 3.63% |  |
C | 3779 | 3779 | 115 | 115 | 3.04% | 3.04% |  |
D | 3779 | 3779 | 1895 | 1895 | 50.15% | 50.15% |  |
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 | 267695 | 2788.33 | 388 | 378 | 95.9 |
A | 15 | 174 | 140276 | 1459.25 | 388 | 378 | 95.9 |
A | 3 | 14 | 99614 | 1035.11 | 388 | 378 | 95.9 |
B | 4 | 206 | 519774 | 6408.29 | 378 | 366 | 81.1 |
B | 10 | 128 | 200149 | 2464.86 | 378 | 366 | 81.1 |
B | 5 | 32 | 113807 | 1399.6 | 378 | 366 | 81.1 |
C | 12 | 254 | 587722 | 5654.32 | 377 | 374 | 103.9 |
C | 0 | 192 | 98613 | 945.73 | 377 | 374 | 103.9 |
C | 0 | 176 | 65683 | 628.72 | 377 | 374 | 103.9 |
D | 11 | 129 | 5533393 | 70986.51 | 277 | 266 | 77.9 |
D | 8 | 176 | 297181 | 3809.23 | 277 | 266 | 77.9 |
D | 11 | 176 | 86305 | 1103.83 | 277 | 266 | 77.9 |
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 |  |