Observation information
- date-obs: 2025-04-02
- time-obs: 00:13:58.164800000
- date-end: 2025-04-02
- time-end: 02:23:22.141400000
- obs_id: A13_090T01_9000006458
- exposure: 1665.96599925
- 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_51442cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51442cztM0_level2_quad_clean.evt
|
| Size (bytes) | 957,576,960 | 90,414,720 |
| Size | 913.2 MB
| 86.2 MB
|
| Events in quadrant A | 8,454,071 | 656,406 |
| Events in quadrant B | 4,628,299 | 750,765 |
| Events in quadrant C | 17,465,617 | 149,780 |
| Events in quadrant D | 4,296,941 | 640,619 |
Level1 data integrity
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 30652 | 3 |
| B | 0 | 19274 | 0 |
| C | 0 | 57190 | 0 |
| D | 0 | 18568 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 154 | 0 |
| B | 0 | 154 | 0 |
| C | 0 | 154 | 0 |
| D | 0 | 154 | 0 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 7763 | 919 | 11.838207% |
| B | 7763 | 313 | 4.031946% |
| C | 7763 | 6435 | 82.893211% |
| D | 7764 | 163 | 2.099433% |
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 | 7763 | 7763 | 839 | 839 | 10.81% | 10.81% |  |
| B | 7763 | 7763 | 275 | 275 | 3.54% | 3.54% |  |
| C | 7762 | 7762 | 6067 | 6067 | 78.16% | 78.16% |  |
| D | 7764 | 7764 | 158 | 158 | 2.04% | 2.04% |  |
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 | 2066925 | 10629.32 | 780 | 761 | 194.4 |
| A | 7 | 64 | 1218131 | 6262.73 | 780 | 761 | 194.4 |
| A | 12 | 250 | 826503 | 4248.01 | 780 | 761 | 194.4 |
| B | 0 | 172 | 553786 | 3225.85 | 799 | 771 | 171.4 |
| B | 12 | 32 | 205211 | 1192.54 | 799 | 771 | 171.4 |
| B | 4 | 81 | 93007 | 538.03 | 799 | 771 | 171.4 |
| C | 15 | 179 | 9015551 | 77963.57 | 422 | 419 | 115.6 |
| C | 4 | 12 | 6020150 | 52059.11 | 422 | 419 | 115.6 |
| C | 10 | 171 | 319934 | 2763.19 | 422 | 419 | 115.6 |
| D | 3 | 12 | 524575 | 2381.98 | 783 | 754 | 219.9 |
| D | 7 | 96 | 140997 | 637.73 | 783 | 754 | 219.9 |
| D | 10 | 172 | 72423 | 325.9 | 783 | 754 | 219.9 |
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 |  |