Observation information
- date-obs: 2025-04-06
- time-obs: 22:07:34.836500000
- date-end: 2025-04-07
- time-end: 00:24:58.812900000
- obs_id: A13_090T01_9000006458
- exposure: 6886.91959888
- 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_51515cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51515cztM0_level2_quad_clean.evt
|
| Size (bytes) | 884,367,360 | 108,120,960 |
| Size | 843.4 MB
| 103.1 MB
|
| Events in quadrant A | 8,432,828 | 648,660 |
| Events in quadrant B | 5,379,551 | 830,812 |
| Events in quadrant C | 8,716,004 | 622,620 |
| Events in quadrant D | 9,571,045 | 598,584 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 30842 | 0 |
| B | 0 | 21600 | 0 |
| C | 0 | 31540 | 0 |
| D | 0 | 34169 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 164 | 0 |
| B | 0 | 164 | 0 |
| C | 0 | 164 | 0 |
| D | 0 | 164 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8244 | 1540 | 18.680252% |
| B | 8244 | 184 | 2.231926% |
| C | 8244 | 1496 | 18.146531% |
| D | 8244 | 1348 | 16.351286% |
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 | 8244 | 8244 | 804 | 804 | 9.75% | 9.75% |  |
| B | 8244 | 8244 | 45 | 45 | 0.55% | 0.55% |  |
| C | 8244 | 8243 | 1320 | 1320 | 16.01% | 16.01% |  |
| D | 8244 | 8244 | 1237 | 1237 | 15.00% | 15.00% |  |
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 | 250 | 3442578 | 16775.05 | 831 | 811 | 205.2 |
| A | 4 | 249 | 359784 | 1749.62 | 831 | 811 | 205.2 |
| A | 7 | 64 | 307935 | 1496.91 | 831 | 811 | 205.2 |
| B | 15 | 52 | 340000 | 1774.33 | 886 | 855 | 191.1 |
| B | 10 | 254 | 271689 | 1416.94 | 886 | 855 | 191.1 |
| B | 5 | 172 | 269104 | 1403.42 | 886 | 855 | 191.1 |
| C | 15 | 1 | 3424365 | 15132.88 | 807 | 800 | 226.2 |
| C | 15 | 205 | 1034806 | 4570.53 | 807 | 800 | 226.2 |
| C | 13 | 3 | 333989 | 1472.77 | 807 | 800 | 226.2 |
| D | 11 | 176 | 2035170 | 9020.23 | 813 | 784 | 225.5 |
| D | 8 | 176 | 1766031 | 7826.9 | 813 | 784 | 225.5 |
| D | 1 | 3 | 730384 | 3234.96 | 813 | 784 | 225.5 |
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 |  |