Observation information
- date-obs: 2025-04-21
- time-obs: 11:04:59.170300000
- date-end: 2025-04-21
- time-end: 13:15:58.149100000
- obs_id: A13_090T01_9000006464
- exposure: 4062.81127441
- 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_51731cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51731cztM0_level2_quad_clean.evt
|
Size (bytes) | 855,400,320 | 101,217,600 |
Size | 815.8 MB
| 96.5 MB
|
Events in quadrant A | 6,997,180 | 694,045 |
Events in quadrant B | 5,195,868 | 774,256 |
Events in quadrant C | 4,974,535 | 704,510 |
Events in quadrant D | 13,887,897 | 344,944 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 158 | 0 |
B | 0 | 158 | 0 |
C | 0 | 158 | 0 |
D | 0 | 158 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 26321 | 0 |
B | 0 | 20689 | 0 |
C | 0 | 20232 | 0 |
D | 0 | 46678 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7859 | 721 | 9.174195% |
B | 7859 | 401 | 5.102430% |
C | 7860 | 278 | 3.536896% |
D | 7860 | 4215 | 53.625954% |
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 | 7859 | 7859 | 459 | 459 | 5.84% | 5.84% |  |
B | 7859 | 7859 | 137 | 137 | 1.74% | 1.74% |  |
C | 7860 | 7860 | 195 | 195 | 2.48% | 2.48% |  |
D | 7860 | 7860 | 3797 | 3797 | 48.31% | 48.31% |  |
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 | 1008947 | 4794.93 | 867 | 847 | 210.2 |
A | 0 | 111 | 908962 | 4319.36 | 867 | 847 | 210.2 |
A | 4 | 175 | 443446 | 2105.18 | 867 | 847 | 210.2 |
B | 4 | 174 | 267835 | 1411.0 | 873 | 843 | 189.2 |
B | 1 | 239 | 216556 | 1140.0 | 873 | 843 | 189.2 |
B | 0 | 216 | 149718 | 786.77 | 873 | 843 | 189.2 |
C | 13 | 3 | 318189 | 1357.38 | 855 | 849 | 233.8 |
C | 3 | 233 | 290356 | 1238.32 | 855 | 849 | 233.8 |
C | 15 | 231 | 199342 | 849.02 | 855 | 849 | 233.8 |
D | 11 | 129 | 10813844 | 63169.18 | 615 | 593 | 171.2 |
D | 8 | 176 | 134446 | 781.95 | 615 | 593 | 171.2 |
D | 2 | 120 | 123405 | 717.45 | 615 | 593 | 171.2 |
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 |  |