Observation information
- date-obs: 2025-04-06
- time-obs: 20:26:37.854400000
- date-end: 2025-04-06
- time-end: 22:40:08.830800000
- obs_id: A13_090T01_9000006458
- exposure: 4570.0072428
- 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_51514cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51514cztM0_level2_quad_clean.evt
|
| Size (bytes) | 916,188,480 | 99,273,600 |
| Size | 873.7 MB
| 94.7 MB
|
| Events in quadrant A | 9,225,530 | 589,533 |
| Events in quadrant B | 4,578,330 | 807,944 |
| Events in quadrant C | 6,879,068 | 667,866 |
| Events in quadrant D | 12,611,289 | 383,397 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 32918 | 1 |
| B | 0 | 18974 | 1 |
| C | 0 | 25915 | 1 |
| D | 0 | 43117 | 1 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 160 | 0 |
| B | 0 | 160 | 0 |
| C | 0 | 160 | 0 |
| D | 0 | 160 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8011 | 2011 | 25.102983% |
| B | 8012 | 145 | 1.809785% |
| C | 8012 | 761 | 9.498253% |
| D | 8012 | 3614 | 45.107339% |
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 | 8011 | 8011 | 1155 | 1155 | 14.42% | 14.42% |  |
| B | 8012 | 8012 | 66 | 66 | 0.82% | 0.82% |  |
| C | 8012 | 8012 | 676 | 676 | 8.44% | 8.44% |  |
| D | 8012 | 8012 | 3263 | 3263 | 40.73% | 40.73% |  |
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 | 250 | 2876642 | 14854.78 | 785 | 763 | 193.6 |
| A | 15 | 174 | 2400474 | 12395.23 | 785 | 763 | 193.6 |
| A | 15 | 250 | 229506 | 1181.53 | 785 | 763 | 193.6 |
| B | 15 | 52 | 267171 | 1446.57 | 861 | 831 | 184.1 |
| B | 5 | 185 | 238855 | 1292.77 | 861 | 831 | 184.1 |
| B | 10 | 254 | 98263 | 529.18 | 861 | 831 | 184.1 |
| C | 15 | 1 | 1789959 | 7991.57 | 805 | 796 | 223.9 |
| C | 15 | 205 | 1066592 | 4760.54 | 805 | 796 | 223.9 |
| C | 12 | 252 | 201250 | 895.36 | 805 | 796 | 223.9 |
| D | 8 | 176 | 7749674 | 45602.84 | 605 | 584 | 169.9 |
| D | 11 | 176 | 937081 | 5511.22 | 605 | 584 | 169.9 |
| D | 1 | 3 | 649509 | 3818.88 | 605 | 584 | 169.9 |
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 |  |