Observation information
- date-obs: 2025-04-01
- time-obs: 10:04:53.321600000
- date-end: 2025-04-01
- time-end: 12:32:29.293700000
- obs_id: A13_090T01_9000006458
- exposure: 4461.29545987
- 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_51434cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51434cztM0_level2_quad_clean.evt
|
| Size (bytes) | 769,939,200 | 91,209,600 |
| Size | 734.3 MB
| 87.0 MB
|
| Events in quadrant A | 8,138,590 | 552,143 |
| Events in quadrant B | 4,249,759 | 704,212 |
| Events in quadrant C | 10,944,269 | 412,832 |
| Events in quadrant D | 4,615,104 | 595,254 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 29191 | 2 |
| B | 0 | 17547 | 2 |
| C | 0 | 37451 | 2 |
| D | 0 | 18640 | 3 |
| 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 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7136 | 1493 | 20.922085% |
| B | 7137 | 338 | 4.735883% |
| C | 7137 | 2904 | 40.689365% |
| D | 7136 | 292 | 4.091928% |
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 | 8856 | 7136 | 1096 | 1096 | 12.38% | 15.36% |  |
| B | 8857 | 7137 | 112 | 112 | 1.26% | 1.57% |  |
| C | 8857 | 7137 | 2550 | 2550 | 28.79% | 35.73% |  |
| D | 8856 | 7136 | 148 | 148 | 1.67% | 2.07% |  |
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 | 7 | 64 | 2055402 | 11715.68 | 717 | 698 | 175.4 |
| A | 12 | 3 | 1031839 | 5879.45 | 717 | 698 | 175.4 |
| A | 12 | 250 | 851839 | 4853.11 | 717 | 698 | 175.4 |
| B | 4 | 206 | 437886 | 2635.62 | 768 | 739 | 165.9 |
| B | 6 | 51 | 127933 | 766.87 | 768 | 739 | 165.9 |
| B | 15 | 52 | 118660 | 710.96 | 768 | 739 | 165.9 |
| C | 4 | 12 | 4797198 | 29149.72 | 601 | 598 | 164.6 |
| C | 0 | 176 | 1228319 | 7461.06 | 601 | 598 | 164.6 |
| C | 15 | 179 | 958441 | 5820.97 | 601 | 598 | 164.6 |
| D | 8 | 176 | 400680 | 1890.19 | 756 | 730 | 211.6 |
| D | 7 | 96 | 354576 | 1672.3 | 756 | 730 | 211.6 |
| D | 3 | 12 | 319940 | 1508.6 | 756 | 730 | 211.6 |
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 |  |