Observation information
- date-obs: 2025-04-22
- time-obs: 02:55:10.154400000
- date-end: 2025-04-22
- time-end: 04:48:50.995600000
- obs_id: A13_090T01_9000006464
- exposure: 4775.08413976
- 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_9000006464_51741cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51741cztM0_level2_quad_clean.evt
|
Size (bytes) | 502,444,800 | 82,008,000 |
Size | 479.2 MB
| 78.2 MB
|
Events in quadrant A | 3,894,265 | 552,150 |
Events in quadrant B | 3,995,055 | 590,883 |
Events in quadrant C | 4,099,803 | 510,618 |
Events in quadrant D | 6,168,092 | 431,044 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 118 | 0 |
B | 0 | 118 | 0 |
C | 0 | 118 | 0 |
D | 0 | 118 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 15427 | 1 |
B | 0 | 15716 | 1 |
C | 0 | 15958 | 1 |
D | 0 | 22210 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 5691 | 163 | 2.864171% |
B | 5691 | 256 | 4.498331% |
C | 5692 | 456 | 8.011244% |
D | 5692 | 1057 | 18.569923% |
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 | 6820 | 5690 | 119 | 119 | 1.74% | 2.09% |  |
B | 6820 | 5690 | 158 | 158 | 2.32% | 2.78% |  |
C | 6821 | 5691 | 388 | 388 | 5.69% | 6.82% |  |
D | 6821 | 5691 | 1018 | 1018 | 14.92% | 17.89% |  |
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 | 4 | 175 | 535652 | 3476.51 | 624 | 607 | 153.9 |
A | 11 | 3 | 255187 | 1654.16 | 624 | 607 | 153.9 |
A | 4 | 3 | 143653 | 929.46 | 624 | 607 | 153.9 |
B | 10 | 44 | 444310 | 3351.63 | 614 | 592 | 132.4 |
B | 4 | 206 | 222310 | 1674.75 | 614 | 592 | 132.4 |
B | 10 | 247 | 156041 | 1174.18 | 614 | 592 | 132.4 |
C | 9 | 38 | 751850 | 4506.86 | 601 | 597 | 166.7 |
C | 13 | 3 | 283924 | 1699.71 | 601 | 597 | 166.7 |
C | 15 | 144 | 138387 | 826.62 | 601 | 597 | 166.7 |
D | 11 | 129 | 3338436 | 21031.47 | 565 | 546 | 158.7 |
D | 8 | 176 | 350459 | 2204.74 | 565 | 546 | 158.7 |
D | 2 | 120 | 76396 | 477.92 | 565 | 546 | 158.7 |
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 |  |