Observation information
- date-obs: 2025-04-02
- time-obs: 20:39:54.930400000
- date-end: 2025-04-02
- time-end: 23:09:22.903100000
- obs_id: A13_090T01_9000006458
- exposure: 6855.71117318
- 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_51455cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51455cztM0_level2_quad_clean.evt
|
| Size (bytes) | 766,134,720 | 108,054,720 |
| Size | 730.6 MB
| 103.0 MB
|
| Events in quadrant A | 9,119,361 | 655,658 |
| Events in quadrant B | 4,817,882 | 783,300 |
| Events in quadrant C | 6,738,077 | 649,561 |
| Events in quadrant D | 7,067,024 | 628,256 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 32727 | 2 |
| B | 0 | 20083 | 2 |
| C | 0 | 25840 | 2 |
| D | 0 | 26617 | 2 |
| 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 | 164 | 0 |
| B | 0 | 164 | 0 |
| C | 0 | 164 | 0 |
| D | 0 | 164 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7978 | 1333 | 16.708448% |
| B | 7979 | 458 | 5.740068% |
| C | 7979 | 1002 | 12.557965% |
| D | 7979 | 807 | 10.114049% |
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 | 8968 | 7981 | 934 | 934 | 10.41% | 11.70% |  |
| B | 8969 | 7982 | 205 | 205 | 2.29% | 2.57% |  |
| C | 8969 | 7982 | 838 | 838 | 9.34% | 10.50% |  |
| D | 8969 | 7982 | 738 | 738 | 8.23% | 9.25% |  |
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 | 7 | 64 | 2497551 | 12378.74 | 818 | 794 | 201.7 |
| A | 12 | 3 | 2220481 | 11005.05 | 818 | 794 | 201.7 |
| A | 12 | 194 | 264551 | 1307.69 | 818 | 794 | 201.7 |
| B | 15 | 52 | 331515 | 1783.76 | 864 | 832 | 185.4 |
| B | 5 | 185 | 305169 | 1641.65 | 864 | 832 | 185.4 |
| B | 4 | 206 | 144749 | 776.31 | 864 | 832 | 185.4 |
| C | 15 | 179 | 2492160 | 11090.61 | 818 | 808 | 224.6 |
| C | 4 | 12 | 355546 | 1579.17 | 818 | 808 | 224.6 |
| C | 13 | 3 | 331898 | 1473.89 | 818 | 808 | 224.6 |
| D | 3 | 12 | 1415753 | 6187.8 | 817 | 787 | 228.7 |
| D | 11 | 176 | 883566 | 3860.49 | 817 | 787 | 228.7 |
| D | 8 | 176 | 784353 | 3426.62 | 817 | 787 | 228.7 |
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 |  |