Observation information
- date-obs: 2025-04-22
- time-obs: 19:05:25.857900000
- date-end: 2025-04-22
- time-end: 22:11:44.817100000
- obs_id: A13_090T01_9000006464
- exposure: 8319.13896739
- 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_51751cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51751cztM0_level2_quad_clean.evt
|
| Size (bytes) | 939,637,440 | 131,892,480 |
| Size | 896.1 MB
| 125.8 MB
|
| Events in quadrant A | 6,190,135 | 891,988 |
| Events in quadrant B | 10,239,647 | 854,959 |
| Events in quadrant C | 6,418,352 | 856,491 |
| Events in quadrant D | 11,172,495 | 707,196 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 14 | 0 |
| B | 0 | 14 | 0 |
| C | 0 | 14 | 0 |
| D | 0 | 14 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 200 | 0 |
| B | 0 | 200 | 0 |
| C | 0 | 200 | 0 |
| D | 0 | 200 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 25041 | 2 |
| B | 0 | 37223 | 2 |
| C | 0 | 25873 | 2 |
| D | 0 | 40022 | 4 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 9847 | 412 | 4.184015% |
| B | 9848 | 1836 | 18.643379% |
| C | 9848 | 457 | 4.640536% |
| D | 9847 | 1822 | 18.503097% |
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 | 11179 | 9850 | 281 | 281 | 2.51% | 2.85% |  |
| B | 11180 | 9851 | 1281 | 1281 | 11.46% | 13.00% |  |
| C | 11180 | 9851 | 301 | 301 | 2.69% | 3.06% |  |
| D | 11179 | 9850 | 1624 | 1624 | 14.53% | 16.49% |  |
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 | 8 | 62 | 396129 | 1528.52 | 1042 | 1015 | 258.5 |
| A | 4 | 175 | 314768 | 1213.77 | 1042 | 1015 | 258.5 |
| A | 15 | 174 | 261632 | 1008.21 | 1042 | 1015 | 258.5 |
| B | 4 | 206 | 4944527 | 23373.67 | 980 | 944 | 211.5 |
| B | 8 | 128 | 841491 | 3974.18 | 980 | 944 | 211.5 |
| B | 0 | 213 | 136217 | 639.58 | 980 | 944 | 211.5 |
| C | 13 | 3 | 905656 | 3269.61 | 1010 | 1002 | 276.7 |
| C | 15 | 224 | 205381 | 738.67 | 1010 | 1002 | 276.7 |
| C | 15 | 230 | 173240 | 622.5 | 1010 | 1002 | 276.7 |
| D | 11 | 129 | 6220679 | 23507.42 | 950 | 914 | 264.6 |
| D | 8 | 176 | 350620 | 1321.7 | 950 | 914 | 264.6 |
| D | 7 | 125 | 218649 | 822.92 | 950 | 914 | 264.6 |
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 |  |