Observation information
- date-obs: 2025-04-02
- time-obs: 14:07:13.047500000
- date-end: 2025-04-02
- time-end: 16:15:36.979700000
- obs_id: A13_090T01_9000006458
- exposure: 4795.82371157
- 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_51451cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51451cztM0_level2_quad_clean.evt
|
| Size (bytes) | 613,572,480 | 91,915,200 |
| Size | 585.1 MB
| 87.7 MB
|
| Events in quadrant A | 4,979,364 | 608,021 |
| Events in quadrant B | 3,962,641 | 690,117 |
| Events in quadrant C | 8,272,874 | 465,012 |
| Events in quadrant D | 4,992,025 | 564,996 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 19212 | 2 |
| B | 0 | 16166 | 2 |
| C | 0 | 29023 | 2 |
| D | 0 | 19394 | 2 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 11 | 0 |
| B | 0 | 12 | 0 |
| C | 0 | 12 | 0 |
| D | 0 | 12 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 134 | 0 |
| B | 0 | 134 | 0 |
| C | 0 | 134 | 0 |
| D | 0 | 134 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6518 | 564 | 8.652961% |
| B | 6517 | 264 | 4.050944% |
| C | 6517 | 1898 | 29.123830% |
| D | 6517 | 360 | 5.524014% |
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 | 7662 | 6518 | 279 | 279 | 3.64% | 4.28% |  |
| B | 7661 | 6517 | 107 | 107 | 1.40% | 1.64% |  |
| C | 7661 | 6517 | 1887 | 1887 | 24.63% | 28.96% |  |
| D | 7661 | 6517 | 321 | 321 | 4.19% | 4.93% |  |
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 | 451731 | 2596.46 | 715 | 699 | 173.7 |
| A | 15 | 174 | 314477 | 1806.33 | 715 | 699 | 173.7 |
| A | 8 | 63 | 189807 | 1088.64 | 715 | 699 | 173.7 |
| B | 5 | 185 | 465059 | 3018.96 | 724 | 701 | 153.8 |
| B | 7 | 252 | 96711 | 624.2 | 724 | 701 | 153.8 |
| B | 15 | 52 | 91191 | 588.31 | 724 | 701 | 153.8 |
| C | 4 | 12 | 4633232 | 28852.78 | 576 | 570 | 160.6 |
| C | 13 | 3 | 426708 | 2654.04 | 576 | 570 | 160.6 |
| C | 3 | 233 | 285691 | 1775.77 | 576 | 570 | 160.6 |
| D | 8 | 176 | 1652909 | 8540.03 | 698 | 676 | 193.5 |
| D | 11 | 176 | 157127 | 808.66 | 698 | 676 | 193.5 |
| D | 10 | 181 | 76587 | 392.37 | 698 | 676 | 193.5 |
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 |  |