Observation information
- date-obs: 2025-04-01
- time-obs: 18:43:53.225500000
- date-end: 2025-04-01
- time-end: 21:07:11.200100000
- obs_id: A13_090T01_9000006458
- exposure: 4503.07857859
- 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_51439cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51439cztM0_level2_quad_clean.evt
|
Size (bytes) | 741,458,880 | 87,042,240 |
Size | 707.1 MB
| 83.0 MB
|
Events in quadrant A | 8,470,389 | 519,611 |
Events in quadrant B | 4,155,986 | 677,380 |
Events in quadrant C | 9,497,249 | 418,861 |
Events in quadrant D | 4,810,713 | 558,602 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 29786 | 2 |
B | 0 | 16863 | 2 |
C | 0 | 32752 | 3 |
D | 0 | 19051 | 3 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20 | 0 |
B | 0 | 21 | 0 |
C | 0 | 21 | 0 |
D | 0 | 21 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 134 | 0 |
B | 0 | 134 | 0 |
C | 0 | 134 | 0 |
D | 0 | 134 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6617 | 1485 | 22.442194% |
B | 6618 | 283 | 4.276216% |
C | 6617 | 2435 | 36.799154% |
D | 6616 | 290 | 4.383313% |
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 | 7558 | 6619 | 1247 | 1247 | 16.50% | 18.84% |  |
B | 7558 | 6619 | 163 | 163 | 2.16% | 2.46% |  |
C | 7557 | 6617 | 2184 | 2184 | 28.90% | 33.01% |  |
D | 7557 | 6618 | 245 | 245 | 3.24% | 3.70% |  |
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 | 1993999 | 12365.82 | 651 | 637 | 161.2 |
A | 7 | 64 | 1751825 | 10863.49 | 651 | 637 | 161.2 |
A | 15 | 174 | 929198 | 5760.33 | 651 | 637 | 161.2 |
B | 5 | 172 | 306385 | 2024.11 | 709 | 684 | 151.0 |
B | 0 | 172 | 215029 | 1419.22 | 709 | 684 | 151.0 |
B | 4 | 206 | 150851 | 994.29 | 709 | 684 | 151.0 |
C | 0 | 176 | 3585999 | 22546.57 | 574 | 569 | 159.0 |
C | 4 | 12 | 1249342 | 7852.77 | 574 | 569 | 159.0 |
C | 15 | 179 | 1109752 | 6974.97 | 574 | 569 | 159.0 |
D | 8 | 176 | 974117 | 5176.62 | 677 | 652 | 188.1 |
D | 13 | 170 | 351358 | 1864.96 | 677 | 652 | 188.1 |
D | 6 | 42 | 191549 | 1015.14 | 677 | 652 | 188.1 |
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 |  |