Observation information
- date-obs: 2025-04-04
- time-obs: 17:57:12.417700000
- date-end: 2025-04-04
- time-end: 20:18:56.384000000
- obs_id: A13_090T01_9000006458
- exposure: 3473.70874417
- 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_51483cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51483cztM0_level2_quad_clean.evt
|
| Size (bytes) | 748,307,520 | 90,711,360 |
| Size | 713.6 MB
| 86.5 MB
|
| Events in quadrant A | 6,987,715 | 618,891 |
| Events in quadrant B | 3,741,727 | 711,179 |
| Events in quadrant C | 3,712,067 | 632,485 |
| Events in quadrant D | 12,716,269 | 296,259 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 25616 | 3 |
| B | 0 | 15968 | 3 |
| C | 0 | 16243 | 3 |
| D | 0 | 42646 | 3 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 14 | 0 |
| B | 0 | 15 | 0 |
| C | 0 | 15 | 0 |
| D | 0 | 15 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 144 | 0 |
| B | 0 | 144 | 0 |
| C | 0 | 144 | 0 |
| D | 0 | 144 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6995 | 624 | 8.920658% |
| B | 6995 | 166 | 2.373124% |
| C | 6995 | 166 | 2.373124% |
| D | 6995 | 3750 | 53.609721% |
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 | 7745 | 6997 | 422 | 422 | 5.45% | 6.03% |  |
| B | 7745 | 6997 | 32 | 32 | 0.41% | 0.46% |  |
| C | 7745 | 6997 | 107 | 107 | 1.38% | 1.53% |  |
| D | 7745 | 6995 | 3575 | 3575 | 46.16% | 51.11% |  |
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 | 2361848 | 13011.34 | 735 | 718 | 181.5 |
| A | 15 | 174 | 791197 | 4356.05 | 735 | 718 | 181.5 |
| A | 12 | 194 | 278934 | 1533.15 | 735 | 718 | 181.5 |
| B | 8 | 234 | 199341 | 1221.35 | 754 | 726 | 162.6 |
| B | 10 | 254 | 76362 | 465.11 | 754 | 726 | 162.6 |
| B | 7 | 252 | 63786 | 387.77 | 754 | 726 | 162.6 |
| C | 13 | 3 | 547871 | 2709.57 | 737 | 732 | 201.9 |
| C | 14 | 254 | 72049 | 353.18 | 737 | 732 | 201.9 |
| C | 12 | 252 | 36528 | 177.27 | 737 | 732 | 201.9 |
| D | 8 | 176 | 10175368 | 69921.78 | 515 | 497 | 145.5 |
| D | 11 | 176 | 178973 | 1226.49 | 515 | 497 | 145.5 |
| D | 1 | 3 | 73928 | 504.62 | 515 | 497 | 145.5 |
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 |  |