Observation information
- date-obs: 2025-04-06
- time-obs: 04:54:34.301600000
- date-end: 2025-04-06
- time-end: 10:34:19.964500000
- obs_id: A13_090T01_9000006458
- exposure: 13096.0499622
- 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_51507cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51507cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,836,293,760 | 230,172,480 |
| Size | 1.7 GB
| 219.5 MB
|
| Events in quadrant A | 13,156,511 | 1,536,298 |
| Events in quadrant B | 20,831,717 | 1,300,380 |
| Events in quadrant C | 10,723,790 | 1,577,508 |
| Events in quadrant D | 21,878,240 | 1,317,732 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 50907 | 3 |
| B | 0 | 74041 | 7 |
| C | 0 | 43905 | 3 |
| D | 0 | 77452 | 3 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 25 | 0 |
| B | 0 | 25 | 0 |
| C | 0 | 25 | 0 |
| D | 0 | 25 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 364 | 0 |
| B | 0 | 364 | 0 |
| C | 0 | 364 | 0 |
| D | 0 | 364 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 17941 | 1354 | 7.546959% |
| B | 17941 | 5095 | 28.398640% |
| C | 17941 | 530 | 2.954127% |
| D | 17941 | 2707 | 15.088345% |
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 | 20385 | 17941 | 1038 | 1038 | 5.09% | 5.79% |  |
| B | 20385 | 17941 | 4083 | 4083 | 20.03% | 22.76% |  |
| C | 20385 | 17941 | 359 | 359 | 1.76% | 2.00% |  |
| D | 20385 | 17941 | 2935 | 2935 | 14.40% | 16.36% |  |
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 | 2 | 143 | 1235313 | 2694.17 | 1879 | 1834 | 457.8 |
| A | 12 | 250 | 907529 | 1978.22 | 1879 | 1834 | 457.8 |
| A | 7 | 64 | 662922 | 1443.95 | 1879 | 1834 | 457.8 |
| B | 4 | 81 | 10204900 | 27906.43 | 1703 | 1642 | 365.6 |
| B | 2 | 208 | 1751938 | 4787.15 | 1703 | 1642 | 365.6 |
| B | 15 | 52 | 633226 | 1727.41 | 1703 | 1642 | 365.6 |
| C | 12 | 247 | 860417 | 1669.23 | 1872 | 1859 | 514.3 |
| C | 13 | 3 | 587750 | 1139.11 | 1872 | 1859 | 514.3 |
| C | 12 | 252 | 303034 | 585.55 | 1872 | 1859 | 514.3 |
| D | 8 | 176 | 8796869 | 17905.11 | 1775 | 1717 | 491.2 |
| D | 11 | 176 | 3565034 | 7254.18 | 1775 | 1717 | 491.2 |
| D | 6 | 42 | 834329 | 1695.03 | 1775 | 1717 | 491.2 |
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 |  |