Observation information
- date-obs: 2025-04-23
- time-obs: 03:00:56.774200000
- date-end: 2025-04-23
- time-end: 05:06:51.751500000
- obs_id: A13_090T01_9000006464
- exposure: 5198.41568464
- 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_51756cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51756cztM0_level2_quad_clean.evt
|
Size (bytes) | 628,660,800 | 89,663,040 |
Size | 599.5 MB
| 85.5 MB
|
Events in quadrant A | 3,513,569 | 636,999 |
Events in quadrant B | 7,396,335 | 574,406 |
Events in quadrant C | 5,119,037 | 561,600 |
Events in quadrant D | 6,747,324 | 497,048 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 12 | 0 |
B | 0 | 12 | 0 |
C | 0 | 12 | 0 |
D | 0 | 12 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 128 | 0 |
B | 0 | 128 | 0 |
C | 0 | 128 | 0 |
D | 0 | 128 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 14775 | 2 |
B | 0 | 26409 | 2 |
C | 0 | 19455 | 2 |
D | 0 | 24372 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6380 | 52 | 0.815047% |
B | 6380 | 1423 | 22.304075% |
C | 6381 | 722 | 11.314841% |
D | 6381 | 1108 | 17.364050% |
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 | 7555 | 6383 | 17 | 17 | 0.23% | 0.27% |  |
B | 7555 | 6382 | 976 | 976 | 12.92% | 15.29% |  |
C | 7556 | 6383 | 497 | 497 | 6.58% | 7.79% |  |
D | 7556 | 6384 | 932 | 932 | 12.33% | 14.60% |  |
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 | 191632 | 1091.49 | 709 | 693 | 174.9 |
A | 4 | 3 | 87338 | 495.3 | 709 | 693 | 174.9 |
A | 11 | 3 | 73501 | 416.2 | 709 | 693 | 174.9 |
B | 4 | 206 | 3806058 | 27687.02 | 640 | 618 | 137.4 |
B | 7 | 0 | 455448 | 3309.18 | 640 | 618 | 137.4 |
B | 5 | 185 | 111085 | 803.72 | 640 | 618 | 137.4 |
C | 15 | 230 | 1786143 | 9757.08 | 661 | 655 | 183.0 |
C | 14 | 96 | 245581 | 1338.43 | 661 | 655 | 183.0 |
C | 2 | 207 | 126482 | 687.6 | 661 | 655 | 183.0 |
D | 11 | 129 | 3264054 | 18166.63 | 642 | 617 | 179.6 |
D | 8 | 176 | 597612 | 3323.3 | 642 | 617 | 179.6 |
D | 2 | 249 | 98443 | 544.57 | 642 | 617 | 179.6 |
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 |  |