Observation information
- date-obs: 2025-04-22
- time-obs: 07:48:47.965100000
- date-end: 2025-04-22
- time-end: 09:59:34.943400000
- obs_id: A13_090T01_9000006464
- exposure: 5952.15562195
- 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_51744cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51744cztM0_level2_quad_clean.evt
|
Size (bytes) | 589,746,240 | 95,578,560 |
Size | 562.4 MB
| 91.2 MB
|
Events in quadrant A | 4,194,707 | 628,397 |
Events in quadrant B | 4,087,550 | 677,539 |
Events in quadrant C | 6,523,828 | 593,936 |
Events in quadrant D | 6,498,402 | 521,083 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 138 | 0 |
B | 0 | 138 | 0 |
C | 0 | 138 | 0 |
D | 0 | 138 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 16985 | 2 |
B | 0 | 16782 | 2 |
C | 0 | 24095 | 8 |
D | 0 | 23959 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6788 | 298 | 4.390100% |
B | 6788 | 369 | 5.436064% |
C | 6787 | 577 | 8.501547% |
D | 6787 | 999 | 14.719316% |
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 | 7613 | 6789 | 97 | 97 | 1.27% | 1.43% |  |
B | 7613 | 6789 | 88 | 88 | 1.16% | 1.30% |  |
C | 7612 | 6788 | 362 | 362 | 4.76% | 5.33% |  |
D | 7612 | 6788 | 807 | 807 | 10.60% | 11.89% |  |
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 | 372598 | 2000.04 | 759 | 739 | 185.9 |
A | 11 | 3 | 187454 | 1004.25 | 759 | 739 | 185.9 |
A | 5 | 240 | 106803 | 570.47 | 759 | 739 | 185.9 |
B | 7 | 0 | 346437 | 2144.45 | 742 | 714 | 161.2 |
B | 1 | 223 | 117165 | 722.32 | 742 | 714 | 161.2 |
B | 5 | 32 | 113532 | 699.79 | 742 | 714 | 161.2 |
C | 10 | 171 | 1831521 | 9154.71 | 729 | 721 | 200.0 |
C | 13 | 3 | 457604 | 2284.59 | 729 | 721 | 200.0 |
C | 9 | 38 | 250230 | 1247.64 | 729 | 721 | 200.0 |
D | 11 | 129 | 3245415 | 16708.99 | 698 | 672 | 194.2 |
D | 1 | 3 | 162055 | 831.05 | 698 | 672 | 194.2 |
D | 8 | 176 | 111052 | 568.41 | 698 | 672 | 194.2 |
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 |  |