Observation information
- date-obs: 2025-04-05
- time-obs: 18:08:07.147500000
- date-end: 2025-04-05
- time-end: 20:35:36.117400000
- obs_id: A13_090T01_9000006458
- exposure: 5508.06257981
- 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_9000006458_51498cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51498cztM0_level2_quad_clean.evt
|
Size (bytes) | 838,310,400 | 96,652,800 |
Size | 799.5 MB
| 92.2 MB
|
Events in quadrant A | 6,668,215 | 661,294 |
Events in quadrant B | 9,280,280 | 594,992 |
Events in quadrant C | 4,833,857 | 673,492 |
Events in quadrant D | 9,667,762 | 473,254 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 24836 | 2 |
B | 0 | 32770 | 2 |
C | 0 | 19516 | 2 |
D | 0 | 34022 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 13 | 0 |
B | 0 | 13 | 0 |
C | 0 | 13 | 0 |
D | 0 | 13 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 156 | 0 |
B | 0 | 156 | 0 |
C | 0 | 156 | 0 |
D | 0 | 156 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7516 | 756 | 10.058542% |
B | 7516 | 1948 | 25.918042% |
C | 7516 | 289 | 3.845130% |
D | 7516 | 2208 | 29.377328% |
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 | 8850 | 7518 | 512 | 512 | 5.79% | 6.81% |  |
B | 8850 | 7518 | 1446 | 1446 | 16.34% | 19.23% |  |
C | 8850 | 7517 | 194 | 194 | 2.19% | 2.58% |  |
D | 8849 | 7516 | 2126 | 2126 | 24.03% | 28.29% |  |
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 | 924327 | 4548.89 | 826 | 805 | 203.0 |
A | 4 | 175 | 499365 | 2455.7 | 826 | 805 | 203.0 |
A | 8 | 43 | 469420 | 2308.2 | 826 | 805 | 203.0 |
B | 4 | 81 | 2946284 | 18225.12 | 743 | 714 | 161.6 |
B | 10 | 254 | 1794036 | 11095.82 | 743 | 714 | 161.6 |
B | 2 | 208 | 985903 | 6095.66 | 743 | 714 | 161.6 |
C | 12 | 252 | 435446 | 1941.28 | 820 | 815 | 223.9 |
C | 3 | 233 | 258516 | 1151.02 | 820 | 815 | 223.9 |
C | 12 | 247 | 191569 | 852.0 | 820 | 815 | 223.9 |
D | 8 | 176 | 5437787 | 27402.28 | 716 | 693 | 198.4 |
D | 11 | 176 | 867376 | 4367.98 | 716 | 693 | 198.4 |
D | 2 | 216 | 141040 | 707.33 | 716 | 693 | 198.4 |
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 |  |