Observation information
- date-obs: 2025-04-04
- time-obs: 23:12:30.360900000
- date-end: 2025-04-05
- time-end: 01:33:39.336000000
- obs_id: A13_090T01_9000006458
- exposure: 2739.97622877
- 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_51486cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51486cztM0_level2_quad_clean.evt
|
| Size (bytes) | 1,126,212,480 | 99,639,360 |
| Size | 1.0 GB
| 95.0 MB
|
| Events in quadrant A | 12,336,130 | 625,689 |
| Events in quadrant B | 5,357,371 | 820,046 |
| Events in quadrant C | 4,285,139 | 755,730 |
| Events in quadrant D | 19,056,098 | 226,876 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 42561 | 0 |
| B | 0 | 21839 | 0 |
| C | 0 | 18915 | 0 |
| D | 0 | 62476 | 1 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 168 | 0 |
| B | 0 | 168 | 0 |
| C | 0 | 168 | 0 |
| D | 0 | 168 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 8469 | 2165 | 25.563821% |
| B | 8470 | 449 | 5.301063% |
| C | 8470 | 128 | 1.511216% |
| D | 8469 | 6085 | 71.850277% |
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 | 8469 | 8469 | 1679 | 1679 | 19.83% | 19.83% |  |
| B | 8470 | 8470 | 306 | 306 | 3.61% | 3.61% |  |
| C | 8470 | 8470 | 120 | 120 | 1.42% | 1.42% |  |
| D | 8469 | 8469 | 5972 | 5972 | 70.52% | 70.52% |  |
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 | 3290722 | 15821.48 | 834 | 815 | 207.9 |
| A | 12 | 250 | 2070869 | 9955.09 | 834 | 815 | 207.9 |
| A | 15 | 174 | 1057896 | 5083.61 | 834 | 815 | 207.9 |
| B | 2 | 208 | 594626 | 3104.43 | 893 | 862 | 191.3 |
| B | 12 | 32 | 444158 | 2317.73 | 893 | 862 | 191.3 |
| B | 7 | 252 | 224257 | 1168.0 | 893 | 862 | 191.3 |
| C | 13 | 3 | 528090 | 2187.33 | 888 | 883 | 241.0 |
| C | 10 | 171 | 61927 | 253.27 | 888 | 883 | 241.0 |
| C | 14 | 254 | 56104 | 229.11 | 888 | 883 | 241.0 |
| D | 8 | 176 | 15999210 | 104539.64 | 543 | 525 | 153.0 |
| D | 2 | 249 | 170839 | 1112.87 | 543 | 525 | 153.0 |
| D | 3 | 12 | 149619 | 974.22 | 543 | 525 | 153.0 |
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 |  |