Observation information
- date-obs: 2025-04-05
- time-obs: 14:52:12.181700000
- date-end: 2025-04-05
- time-end: 17:06:00.153200000
- obs_id: A13_090T01_9000006458
- exposure: 3976.01997691
- 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_51496cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51496cztM0_level2_quad_clean.evt
|
| Size (bytes) | 674,634,240 | 88,404,480 |
| Size | 643.4 MB
| 84.3 MB
|
| Events in quadrant A | 5,329,505 | 602,456 |
| Events in quadrant B | 4,460,945 | 662,655 |
| Events in quadrant C | 3,398,552 | 606,460 |
| Events in quadrant D | 11,280,503 | 352,771 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20255 | 1 |
| B | 0 | 17448 | 1 |
| C | 0 | 14796 | 1 |
| D | 0 | 38008 | 1 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 16 | 0 |
| B | 0 | 17 | 0 |
| C | 0 | 17 | 0 |
| D | 0 | 17 | 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 | 6490 | 498 | 7.673344% |
| B | 6490 | 412 | 6.348228% |
| C | 6490 | 166 | 2.557781% |
| D | 6490 | 2887 | 44.483821% |
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 | 7528 | 6493 | 285 | 285 | 3.79% | 4.39% |  |
| B | 7528 | 6493 | 189 | 189 | 2.51% | 2.91% |  |
| C | 7528 | 6493 | 70 | 70 | 0.93% | 1.08% |  |
| D | 7528 | 6493 | 2839 | 2839 | 37.71% | 43.72% |  |
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 | 693776 | 3936.54 | 722 | 703 | 176.1 |
| A | 12 | 2 | 417521 | 2367.46 | 722 | 703 | 176.1 |
| A | 8 | 249 | 337871 | 1915.06 | 722 | 703 | 176.1 |
| B | 6 | 51 | 317705 | 2048.79 | 719 | 694 | 154.7 |
| B | 5 | 185 | 301927 | 1946.82 | 719 | 694 | 154.7 |
| B | 8 | 128 | 229384 | 1477.98 | 719 | 694 | 154.7 |
| C | 13 | 3 | 150149 | 769.22 | 711 | 706 | 194.3 |
| C | 9 | 38 | 112244 | 574.11 | 711 | 706 | 194.3 |
| C | 15 | 215 | 63673 | 324.11 | 711 | 706 | 194.3 |
| D | 8 | 176 | 4196625 | 26247.06 | 574 | 555 | 159.9 |
| D | 11 | 176 | 3521047 | 22021.22 | 574 | 555 | 159.9 |
| D | 2 | 216 | 559001 | 3493.17 | 574 | 555 | 159.9 |
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 |  |