Observation information
- date-obs: 2025-04-26
- time-obs: 00:04:16.724000000
- date-end: 2025-04-26
- time-end: 02:36:26.046900000
- obs_id: A13_090T01_9000006464
- exposure: 6266.38431704
- 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_51799cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51799cztM0_level2_quad_clean.evt
|
| Size (bytes) | 651,202,560 | 99,169,920 |
| Size | 621.0 MB
| 94.6 MB
|
| Events in quadrant A | 5,269,607 | 649,647 |
| Events in quadrant B | 6,007,242 | 683,236 |
| Events in quadrant C | 5,829,143 | 619,475 |
| Events in quadrant D | 6,466,028 | 570,262 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 22 | 0 |
| B | 0 | 22 | 0 |
| C | 0 | 22 | 0 |
| D | 0 | 22 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 142 | 0 |
| B | 0 | 142 | 0 |
| C | 0 | 142 | 0 |
| D | 0 | 142 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20337 | 2 |
| B | 0 | 22617 | 2 |
| C | 0 | 22099 | 2 |
| D | 0 | 23925 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6890 | 375 | 5.442671% |
| B | 6891 | 741 | 10.753156% |
| C | 6891 | 511 | 7.415469% |
| D | 6891 | 682 | 9.896967% |
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 | 9130 | 6892 | 348 | 348 | 3.81% | 5.05% |  |
| B | 9131 | 6893 | 493 | 493 | 5.40% | 7.15% |  |
| C | 9131 | 6892 | 446 | 446 | 4.88% | 6.47% |  |
| D | 9131 | 6892 | 674 | 674 | 7.38% | 9.78% |  |
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 | 990094 | 5368.38 | 741 | 723 | 184.3 |
| A | 11 | 3 | 228590 | 1236.42 | 741 | 723 | 184.3 |
| A | 12 | 3 | 204474 | 1105.56 | 741 | 723 | 184.3 |
| B | 10 | 128 | 911902 | 5781.78 | 731 | 705 | 157.6 |
| B | 5 | 32 | 429558 | 2721.18 | 731 | 705 | 157.6 |
| B | 12 | 32 | 382521 | 2422.72 | 731 | 705 | 157.6 |
| C | 15 | 218 | 822486 | 4176.52 | 718 | 713 | 196.8 |
| C | 10 | 22 | 796169 | 4042.76 | 718 | 713 | 196.8 |
| C | 13 | 3 | 585420 | 2971.67 | 718 | 713 | 196.8 |
| D | 11 | 129 | 1901030 | 9572.79 | 711 | 686 | 198.5 |
| D | 8 | 176 | 738946 | 3718.91 | 711 | 686 | 198.5 |
| D | 3 | 12 | 460990 | 2318.74 | 711 | 686 | 198.5 |
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 |  |