Observation information
- date-obs: 2025-04-02
- time-obs: 12:26:44.253200000
- date-end: 2025-04-02
- time-end: 14:32:59.999100000
- obs_id: A13_090T01_9000006458
- exposure: 5740.17905807
- 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_51450cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51450cztM0_level2_quad_clean.evt
|
| Size (bytes) | 592,634,880 | 91,048,320 |
| Size | 565.2 MB
| 86.8 MB
|
| Events in quadrant A | 6,014,717 | 568,727 |
| Events in quadrant B | 5,284,425 | 618,923 |
| Events in quadrant C | 6,146,702 | 556,662 |
| Events in quadrant D | 3,987,926 | 559,296 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 22322 | 1 |
| B | 0 | 20146 | 1 |
| C | 0 | 22683 | 1 |
| D | 0 | 16472 | 1 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 11 | 0 |
| B | 0 | 11 | 0 |
| C | 0 | 11 | 0 |
| D | 0 | 11 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6496 | 826 | 12.715517% |
| B | 6497 | 796 | 12.251809% |
| C | 6497 | 798 | 12.282592% |
| D | 6497 | 238 | 3.663229% |
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 | 7575 | 6495 | 711 | 711 | 9.39% | 10.95% |  |
| B | 7576 | 6496 | 528 | 528 | 6.97% | 8.13% |  |
| C | 7576 | 6496 | 710 | 710 | 9.37% | 10.93% |  |
| D | 7576 | 6496 | 196 | 196 | 2.59% | 3.02% |  |
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 | 1775434 | 10572.65 | 683 | 666 | 167.9 |
| A | 15 | 174 | 515194 | 3065.15 | 683 | 666 | 167.9 |
| A | 12 | 3 | 455149 | 2707.45 | 683 | 666 | 167.9 |
| B | 5 | 185 | 1572473 | 10929.59 | 679 | 656 | 143.8 |
| B | 4 | 206 | 397748 | 2761.17 | 679 | 656 | 143.8 |
| B | 15 | 52 | 135962 | 940.85 | 679 | 656 | 143.8 |
| C | 4 | 12 | 1491503 | 8169.39 | 663 | 654 | 182.5 |
| C | 15 | 179 | 625636 | 3424.71 | 663 | 654 | 182.5 |
| C | 13 | 3 | 570875 | 3124.63 | 663 | 654 | 182.5 |
| D | 8 | 176 | 712449 | 3731.6 | 688 | 662 | 190.7 |
| D | 8 | 192 | 159519 | 832.82 | 688 | 662 | 190.7 |
| D | 10 | 181 | 112474 | 586.18 | 688 | 662 | 190.7 |
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 |  |