Observation information
- date-obs: 2025-04-25
- time-obs: 19:13:09.122700000
- date-end: 2025-04-25
- time-end: 21:20:52.101100000
- obs_id: A13_090T01_9000006464
- exposure: 5406.53669435
- 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_51795cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51795cztM0_level2_quad_clean.evt
|
| Size (bytes) | 718,102,080 | 91,074,240 |
| Size | 684.8 MB
| 86.9 MB
|
| Events in quadrant A | 8,456,518 | 562,538 |
| Events in quadrant B | 4,331,882 | 675,026 |
| Events in quadrant C | 4,653,477 | 586,145 |
| Events in quadrant D | 8,610,611 | 456,451 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 8 | 0 |
| B | 0 | 8 | 0 |
| C | 0 | 8 | 0 |
| D | 0 | 8 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 140 | 0 |
| B | 0 | 140 | 0 |
| C | 0 | 140 | 0 |
| D | 0 | 140 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 29994 | 2 |
| B | 0 | 17653 | 2 |
| C | 0 | 18799 | 2 |
| D | 0 | 30340 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6843 | 993 | 14.511179% |
| B | 6843 | 257 | 3.755663% |
| C | 6844 | 428 | 6.253653% |
| D | 6844 | 1671 | 24.415546% |
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 | 7663 | 6844 | 891 | 891 | 11.63% | 13.02% |  |
| B | 7663 | 6843 | 124 | 124 | 1.62% | 1.81% |  |
| C | 7664 | 6845 | 399 | 399 | 5.21% | 5.83% |  |
| D | 7664 | 6845 | 1603 | 1603 | 20.92% | 23.42% |  |
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 | 15 | 174 | 2053054 | 11958.96 | 686 | 668 | 171.6 |
| A | 12 | 3 | 1736888 | 10116.71 | 686 | 668 | 171.6 |
| A | 10 | 253 | 414953 | 2413.98 | 686 | 668 | 171.6 |
| B | 10 | 128 | 389726 | 2526.36 | 718 | 694 | 154.0 |
| B | 0 | 171 | 247324 | 1601.61 | 718 | 694 | 154.0 |
| B | 7 | 252 | 238326 | 1543.18 | 718 | 694 | 154.0 |
| C | 15 | 218 | 876815 | 4605.54 | 692 | 684 | 190.2 |
| C | 13 | 3 | 525303 | 2757.75 | 692 | 684 | 190.2 |
| C | 15 | 231 | 152001 | 795.42 | 692 | 684 | 190.2 |
| D | 11 | 129 | 4367996 | 24842.95 | 627 | 604 | 175.8 |
| D | 12 | 6 | 428993 | 2436.8 | 627 | 604 | 175.8 |
| D | 8 | 176 | 331408 | 1881.71 | 627 | 604 | 175.8 |
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 |  |