Observation information
- date-obs: 2025-04-28
- time-obs: 02:32:06.578500000
- date-end: 2025-04-28
- time-end: 04:51:07.555900000
- obs_id: A13_090T01_9000006464
- exposure: 4128.86196285
- 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_9000006464_51830cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51830cztM0_level2_quad_clean.evt
|
| Size (bytes) | 717,108,480 | 90,192,960 |
| Size | 683.9 MB
| 86.0 MB
|
| Events in quadrant A | 5,454,910 | 626,483 |
| Events in quadrant B | 5,987,605 | 662,854 |
| Events in quadrant C | 4,025,971 | 614,329 |
| Events in quadrant D | 10,566,030 | 366,569 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16 | 0 |
| B | 0 | 17 | 0 |
| C | 0 | 17 | 0 |
| D | 0 | 17 | 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 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20808 | 2 |
| B | 0 | 22302 | 2 |
| C | 0 | 16598 | 2 |
| D | 0 | 35933 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6596 | 318 | 4.821104% |
| B | 6596 | 619 | 9.384475% |
| C | 6596 | 259 | 3.926622% |
| D | 6596 | 2813 | 42.647059% |
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 | 7666 | 6597 | 179 | 179 | 2.33% | 2.71% |  |
| B | 7666 | 6597 | 392 | 392 | 5.11% | 5.94% |  |
| C | 7666 | 6597 | 137 | 137 | 1.79% | 2.08% |  |
| D | 7666 | 6597 | 2214 | 2214 | 28.88% | 33.56% |  |
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 | 1224650 | 6933.04 | 719 | 701 | 176.5 |
| A | 15 | 174 | 446056 | 2522.71 | 719 | 701 | 176.5 |
| A | 5 | 240 | 355306 | 2008.66 | 719 | 701 | 176.5 |
| B | 10 | 128 | 1120003 | 7376.48 | 711 | 685 | 151.7 |
| B | 15 | 54 | 795308 | 5236.69 | 711 | 685 | 151.7 |
| B | 1 | 223 | 259733 | 1707.17 | 711 | 685 | 151.7 |
| C | 13 | 3 | 357286 | 1800.66 | 713 | 706 | 198.0 |
| C | 15 | 231 | 188795 | 949.81 | 713 | 706 | 198.0 |
| C | 12 | 254 | 147934 | 743.47 | 713 | 706 | 198.0 |
| D | 11 | 129 | 6932274 | 43249.23 | 572 | 551 | 160.3 |
| D | 8 | 176 | 967581 | 6033.61 | 572 | 551 | 160.3 |
| D | 11 | 176 | 100978 | 626.6 | 572 | 551 | 160.3 |
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 |  |