Observation information
- date-obs: 2025-04-01
- time-obs: 15:15:33.263300000
- date-end: 2025-04-01
- time-end: 17:40:24.236300000
- obs_id: A13_090T01_9000006458
- exposure: 5246.38119906
- 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_51437cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51437cztM0_level2_quad_clean.evt
|
| Size (bytes) | 583,410,240 | 92,620,800 |
| Size | 556.4 MB
| 88.3 MB
|
| Events in quadrant A | 5,877,897 | 586,730 |
| Events in quadrant B | 3,784,621 | 690,039 |
| Events in quadrant C | 6,951,249 | 515,808 |
| Events in quadrant D | 4,483,664 | 564,300 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 21797 | 2 |
| B | 0 | 15571 | 2 |
| C | 0 | 25067 | 4 |
| D | 0 | 17770 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 23 | 0 |
| B | 0 | 24 | 0 |
| C | 0 | 24 | 0 |
| D | 0 | 24 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 130 | 0 |
| B | 0 | 130 | 0 |
| C | 0 | 130 | 0 |
| D | 0 | 130 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6426 | 858 | 13.352007% |
| B | 6426 | 278 | 4.326175% |
| C | 6425 | 1318 | 20.513619% |
| D | 6425 | 332 | 5.167315% |
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 | 7576 | 6426 | 690 | 690 | 9.11% | 10.74% |  |
| B | 7576 | 6426 | 118 | 118 | 1.56% | 1.84% |  |
| C | 7574 | 6424 | 1115 | 1115 | 14.72% | 17.36% |  |
| D | 7575 | 6425 | 238 | 238 | 3.14% | 3.70% |  |
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 | 2070293 | 12198.16 | 697 | 680 | 169.7 |
| A | 4 | 175 | 313550 | 1844.04 | 697 | 680 | 169.7 |
| A | 12 | 250 | 238859 | 1403.81 | 697 | 680 | 169.7 |
| B | 4 | 206 | 338298 | 2230.4 | 715 | 691 | 151.4 |
| B | 0 | 172 | 131024 | 861.04 | 715 | 691 | 151.4 |
| B | 5 | 185 | 90524 | 593.48 | 715 | 691 | 151.4 |
| C | 0 | 176 | 1606770 | 9377.79 | 627 | 621 | 171.3 |
| C | 4 | 12 | 1174921 | 6856.36 | 627 | 621 | 171.3 |
| C | 10 | 171 | 701605 | 4092.82 | 627 | 621 | 171.3 |
| D | 6 | 42 | 1041965 | 5434.24 | 680 | 656 | 191.6 |
| D | 8 | 176 | 151457 | 786.98 | 680 | 656 | 191.6 |
| D | 0 | 113 | 111484 | 578.37 | 680 | 656 | 191.6 |
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 |  |