Observation information
- date-obs: 2025-04-26
- time-obs: 10:48:33.966100000
- date-end: 2025-04-26
- time-end: 13:01:18.945200000
- obs_id: A13_090T01_9000006464
- exposure: 7261.94538051
- 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_51805cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51805cztM0_level2_quad_clean.evt
|
| Size (bytes) | 721,175,040 | 110,557,440 |
| Size | 687.8 MB
| 105.4 MB
|
| Events in quadrant A | 5,676,125 | 723,727 |
| Events in quadrant B | 6,884,326 | 764,482 |
| Events in quadrant C | 5,860,953 | 687,022 |
| Events in quadrant D | 7,658,287 | 618,110 |
Level1 data integrity
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 160 | 0 |
| B | 0 | 160 | 0 |
| C | 0 | 160 | 0 |
| D | 0 | 160 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 22193 | 0 |
| B | 0 | 25917 | 0 |
| C | 0 | 22912 | 0 |
| D | 0 | 28235 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7965 | 214 | 2.686755% |
| B | 7966 | 576 | 7.230731% |
| C | 7966 | 339 | 4.255586% |
| D | 7965 | 892 | 11.198996% |
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 | 7965 | 7965 | 190 | 190 | 2.39% | 2.39% |  |
| B | 7966 | 7966 | 489 | 489 | 6.14% | 6.14% |  |
| C | 7966 | 7966 | 293 | 293 | 3.68% | 3.68% |  |
| D | 7965 | 7965 | 884 | 884 | 11.10% | 11.10% |  |
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 | 603621 | 2899.68 | 852 | 831 | 207.9 |
| A | 11 | 3 | 387635 | 1860.69 | 852 | 831 | 207.9 |
| A | 4 | 175 | 342524 | 1643.69 | 852 | 831 | 207.9 |
| B | 10 | 128 | 1597572 | 8836.94 | 835 | 806 | 180.7 |
| B | 4 | 206 | 518123 | 2862.97 | 835 | 806 | 180.7 |
| B | 10 | 44 | 362553 | 2002.01 | 835 | 806 | 180.7 |
| C | 10 | 22 | 887399 | 3953.18 | 821 | 814 | 224.3 |
| C | 15 | 199 | 483905 | 2154.05 | 821 | 814 | 224.3 |
| C | 3 | 233 | 297360 | 1322.27 | 821 | 814 | 224.3 |
| D | 11 | 129 | 3232227 | 14602.36 | 800 | 773 | 221.3 |
| D | 0 | 18 | 267665 | 1206.03 | 800 | 773 | 221.3 |
| D | 3 | 12 | 211616 | 952.76 | 800 | 773 | 221.3 |
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 |  |