Observation information
- date-obs: 2025-03-31
- time-obs: 21:49:16.461900000
- date-end: 2025-04-01
- time-end: 00:18:04.434700000
- obs_id: A13_090T01_9000006458
- exposure: 4205.68149692
- 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_51426cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51426cztM0_level2_quad_clean.evt
|
| Size (bytes) | 887,711,040 | 105,016,320 |
| Size | 846.6 MB
| 100.2 MB
|
| Events in quadrant A | 7,834,797 | 729,138 |
| Events in quadrant B | 5,001,093 | 814,213 |
| Events in quadrant C | 14,311,119 | 392,353 |
| Events in quadrant D | 5,088,015 | 682,256 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 29045 | 2 |
| B | 0 | 20398 | 2 |
| C | 0 | 48033 | 2 |
| D | 0 | 20800 | 4 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 8 | 0 |
| B | 0 | 8 | 0 |
| C | 0 | 8 | 0 |
| D | 0 | 8 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 166 | 0 |
| B | 0 | 166 | 0 |
| C | 0 | 166 | 0 |
| D | 0 | 166 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8078 | 652 | 8.071305% |
| B | 8078 | 364 | 4.506066% |
| C | 8079 | 4147 | 51.330610% |
| D | 8078 | 216 | 2.673929% |
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 | 8928 | 8080 | 406 | 406 | 4.55% | 5.02% |  |
| B | 8928 | 8080 | 125 | 125 | 1.40% | 1.55% |  |
| C | 8929 | 8080 | 3665 | 3665 | 41.05% | 45.36% |  |
| D | 8928 | 8080 | 165 | 165 | 1.85% | 2.04% |  |
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 | 1626960 | 7456.25 | 879 | 854 | 218.1 |
| A | 12 | 250 | 787222 | 3605.77 | 879 | 854 | 218.1 |
| A | 7 | 64 | 488294 | 2235.08 | 879 | 854 | 218.1 |
| B | 5 | 185 | 314188 | 1629.61 | 891 | 859 | 192.3 |
| B | 5 | 172 | 265944 | 1378.69 | 891 | 859 | 192.3 |
| B | 10 | 14 | 85102 | 438.14 | 891 | 859 | 192.3 |
| C | 4 | 12 | 7895141 | 43823.01 | 653 | 648 | 180.1 |
| C | 15 | 179 | 2038738 | 11313.61 | 653 | 648 | 180.1 |
| C | 10 | 171 | 703845 | 3903.5 | 653 | 648 | 180.1 |
| D | 8 | 176 | 558804 | 2305.05 | 868 | 838 | 242.1 |
| D | 7 | 80 | 232357 | 956.44 | 868 | 838 | 242.1 |
| D | 3 | 12 | 221224 | 910.45 | 868 | 838 | 242.1 |
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 |  |