Observation information
- date-obs: 2025-03-31
- time-obs: 13:23:53.554700000
- date-end: 2025-03-31
- time-end: 15:42:06.528100000
- obs_id: A13_090T01_9000006458
- exposure: 3996.34672385
- 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_51421cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51421cztM0_level2_quad_clean.evt
|
| Size (bytes) | 664,597,440 | 92,237,760 |
| Size | 633.8 MB
| 88.0 MB
|
| Events in quadrant A | 5,141,493 | 641,427 |
| Events in quadrant B | 4,635,228 | 686,053 |
| Events in quadrant C | 10,698,912 | 395,443 |
| Events in quadrant D | 3,605,527 | 602,552 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 19947 | 2 |
| B | 0 | 18227 | 3 |
| C | 0 | 36390 | 2 |
| D | 0 | 15388 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 15 | 0 |
| B | 0 | 16 | 0 |
| C | 0 | 16 | 0 |
| D | 0 | 16 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 136 | 0 |
| B | 0 | 136 | 0 |
| C | 0 | 136 | 0 |
| D | 0 | 136 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6704 | 387 | 5.772673% |
| B | 6703 | 481 | 7.175891% |
| C | 6703 | 2847 | 42.473519% |
| D | 6703 | 127 | 1.894674% |
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 | 7804 | 6705 | 199 | 199 | 2.55% | 2.97% |  |
| B | 7803 | 6703 | 274 | 274 | 3.51% | 4.09% |  |
| C | 7803 | 6703 | 2520 | 2520 | 32.30% | 37.60% |  |
| D | 7803 | 6704 | 45 | 45 | 0.58% | 0.67% |  |
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 | 621869 | 3398.9 | 752 | 733 | 182.7 |
| A | 15 | 174 | 491334 | 2684.61 | 752 | 733 | 182.7 |
| A | 5 | 240 | 200582 | 1093.59 | 752 | 733 | 182.7 |
| B | 5 | 172 | 653090 | 4191.92 | 732 | 708 | 155.6 |
| B | 5 | 185 | 372454 | 2388.67 | 732 | 708 | 155.6 |
| B | 10 | 14 | 168558 | 1078.53 | 732 | 708 | 155.6 |
| C | 15 | 179 | 3488516 | 21765.61 | 579 | 574 | 160.3 |
| C | 15 | 230 | 1455653 | 9080.05 | 579 | 574 | 160.3 |
| C | 4 | 12 | 917831 | 5723.9 | 579 | 574 | 160.3 |
| D | 2 | 153 | 116275 | 566.91 | 735 | 710 | 203.9 |
| D | 5 | 157 | 64424 | 312.55 | 735 | 710 | 203.9 |
| D | 10 | 172 | 64226 | 311.58 | 735 | 710 | 203.9 |
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 |  |