Observation information
- date-obs: 2025-04-25
- time-obs: 05:28:25.257100000
- date-end: 2025-04-25
- time-end: 07:26:15.237400000
- obs_id: A13_090T01_9000006464
- exposure: 4462.06295663
- 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_51787cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51787cztM0_level2_quad_clean.evt
|
| Size (bytes) | 618,456,960 | 82,028,160 |
| Size | 589.8 MB
| 78.2 MB
|
| Events in quadrant A | 5,361,890 | 565,357 |
| Events in quadrant B | 6,921,636 | 473,318 |
| Events in quadrant C | 4,138,681 | 547,058 |
| Events in quadrant D | 6,000,603 | 473,875 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 10 | 0 |
| B | 0 | 10 | 0 |
| C | 0 | 10 | 0 |
| D | 0 | 10 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 124 | 0 |
| B | 0 | 124 | 0 |
| C | 0 | 124 | 0 |
| D | 0 | 124 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 20109 | 1 |
| B | 0 | 24778 | 1 |
| C | 0 | 16445 | 1 |
| D | 0 | 21955 | 1 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6071 | 261 | 4.299127% |
| B | 6071 | 1628 | 26.816011% |
| C | 6071 | 305 | 5.023884% |
| D | 6071 | 841 | 13.852743% |
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 | 7071 | 6072 | 127 | 127 | 1.80% | 2.09% |  |
| B | 7070 | 6071 | 1470 | 1470 | 20.79% | 24.21% |  |
| C | 7071 | 6072 | 223 | 223 | 3.15% | 3.67% |  |
| D | 7071 | 6071 | 752 | 752 | 10.63% | 12.39% |  |
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 | 1408989 | 8751.99 | 658 | 644 | 160.9 |
| A | 15 | 174 | 249361 | 1545.62 | 658 | 644 | 160.9 |
| A | 11 | 14 | 193692 | 1199.67 | 658 | 644 | 160.9 |
| B | 10 | 128 | 3485626 | 30501.73 | 530 | 512 | 114.3 |
| B | 10 | 44 | 601468 | 5259.57 | 530 | 512 | 114.3 |
| B | 4 | 206 | 193540 | 1689.38 | 530 | 512 | 114.3 |
| C | 13 | 3 | 387478 | 2206.58 | 641 | 636 | 175.3 |
| C | 15 | 218 | 272404 | 1550.19 | 641 | 636 | 175.3 |
| C | 12 | 254 | 212361 | 1207.7 | 641 | 636 | 175.3 |
| D | 11 | 129 | 2805605 | 16375.86 | 616 | 594 | 171.3 |
| D | 3 | 12 | 434566 | 2533.56 | 616 | 594 | 171.3 |
| D | 8 | 176 | 87913 | 509.77 | 616 | 594 | 171.3 |
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 |  |