Observation information
- date-obs: 2025-04-08
- time-obs: 22:41:42.293800000
- date-end: 2025-04-09
- time-end: 01:20:07.265700000
- obs_id: A13_090T01_9000006458
- exposure: 6697.99324495
- 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_51548cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51548cztM0_level2_quad_clean.evt
|
| Size (bytes) | 948,487,680 | 117,587,520 |
| Size | 904.5 MB
| 112.1 MB
|
| Events in quadrant A | 10,190,177 | 750,181 |
| Events in quadrant B | 12,107,810 | 675,418 |
| Events in quadrant C | 4,716,739 | 798,129 |
| Events in quadrant D | 7,401,195 | 712,372 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 37876 | 1284 |
| B | 0 | 44224 | 2022 |
| C | 0 | 21593 | 923 |
| D | 0 | 29470 | 916 |
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 2 | 0 |
| B | 0 | 2 | 0 |
| C | 0 | 2 | 0 |
| D | 0 | 2 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 190 | 6 |
| B | 0 | 189 | 3 |
| C | 0 | 189 | 5 |
| D | 0 | 189 | 7 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8980 | 1116 | 12.427617% |
| B | 8915 | 2520 | 28.266966% |
| C | 9022 | 187 | 2.072711% |
| D | 9024 | 656 | 7.269504% |
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 | 9264 | 9142 | 759 | 759 | 8.19% | 8.30% |  |
| B | 9276 | 9062 | 1962 | 1962 | 21.15% | 21.65% |  |
| C | 9267 | 9138 | 128 | 128 | 1.38% | 1.40% |  |
| D | 9287 | 9154 | 592 | 592 | 6.37% | 6.47% |  |
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 | 2490224 | 10757.12 | 934 | 909 | 231.4 |
| A | 12 | 250 | 1531622 | 6614.7 | 934 | 909 | 231.4 |
| A | 12 | 17 | 1267562 | 5473.61 | 934 | 909 | 231.4 |
| B | 10 | 44 | 6042548 | 32391.2 | 869 | 840 | 186.5 |
| B | 15 | 52 | 797198 | 4269.49 | 869 | 840 | 186.5 |
| B | 4 | 81 | 726234 | 3889.03 | 869 | 840 | 186.5 |
| C | 13 | 3 | 452392 | 1688.68 | 960 | 952 | 267.3 |
| C | 3 | 233 | 102871 | 381.24 | 960 | 952 | 267.3 |
| C | 10 | 19 | 71165 | 262.64 | 960 | 952 | 267.3 |
| D | 8 | 176 | 2401517 | 9296.78 | 921 | 891 | 258.2 |
| D | 12 | 6 | 429295 | 1659.06 | 921 | 891 | 258.2 |
| D | 7 | 60 | 270169 | 1042.82 | 921 | 891 | 258.2 |
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 |  |