Observation information
- date-obs: 2025-04-25
- time-obs: 08:53:12.222800000
- date-end: 2025-04-25
- time-end: 11:00:00.201700000
- obs_id: A13_090T01_9000006464
- exposure: 5728.10511816
- 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_51789cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51789cztM0_level2_quad_clean.evt
|
Size (bytes) | 869,834,880 | 95,244,480 |
Size | 829.5 MB
| 90.8 MB
|
Events in quadrant A | 7,758,584 | 623,216 |
Events in quadrant B | 8,226,062 | 593,959 |
Events in quadrant C | 5,527,662 | 650,692 |
Events in quadrant D | 10,097,926 | 486,236 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 152 | 0 |
B | 0 | 152 | 0 |
C | 0 | 152 | 0 |
D | 0 | 152 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 28280 | 0 |
B | 0 | 29593 | 0 |
C | 0 | 21648 | 0 |
D | 0 | 35280 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7608 | 1143 | 15.023659% |
B | 7608 | 1904 | 25.026288% |
C | 7608 | 642 | 8.438486% |
D | 7608 | 2248 | 29.547844% |
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 | 7608 | 7608 | 580 | 580 | 7.62% | 7.62% |  |
B | 7608 | 7608 | 1339 | 1339 | 17.60% | 17.60% |  |
C | 7608 | 7608 | 373 | 373 | 4.90% | 4.90% |  |
D | 7607 | 7607 | 1915 | 1915 | 25.17% | 25.17% |  |
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 | 2 | 143 | 2076590 | 10213.29 | 827 | 806 | 203.2 |
A | 4 | 175 | 1346020 | 6618.74 | 827 | 806 | 203.2 |
A | 12 | 3 | 149004 | 729.17 | 827 | 806 | 203.2 |
B | 10 | 128 | 4016023 | 23765.21 | 777 | 748 | 169.0 |
B | 4 | 206 | 490366 | 2897.9 | 777 | 748 | 169.0 |
B | 0 | 171 | 152500 | 898.17 | 777 | 748 | 169.0 |
C | 13 | 3 | 811037 | 3627.03 | 822 | 816 | 223.4 |
C | 12 | 252 | 205088 | 914.44 | 822 | 816 | 223.4 |
C | 0 | 209 | 188970 | 842.29 | 822 | 816 | 223.4 |
D | 11 | 129 | 5740828 | 27919.49 | 747 | 721 | 205.6 |
D | 3 | 12 | 353533 | 1716.05 | 747 | 721 | 205.6 |
D | 8 | 176 | 326709 | 1585.58 | 747 | 721 | 205.6 |
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 |  |