Observation information
- date-obs: 2025-04-22
- time-obs: 04:13:48.019800000
- date-end: 2025-04-22
- time-end: 06:32:41.977900000
- obs_id: A13_090T01_9000006464
- exposure: 5701.13658357
- 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_51742cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51742cztM0_level2_quad_clean.evt
|
Size (bytes) | 529,427,520 | 96,563,520 |
Size | 504.9 MB
| 92.1 MB
|
Events in quadrant A | 4,267,808 | 639,315 |
Events in quadrant B | 3,786,658 | 698,067 |
Events in quadrant C | 4,321,688 | 615,121 |
Events in quadrant D | 6,722,043 | 522,273 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19 | 0 |
B | 0 | 20 | 0 |
C | 0 | 20 | 0 |
D | 0 | 20 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 130 | 0 |
B | 0 | 130 | 0 |
C | 0 | 130 | 0 |
D | 0 | 130 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 17020 | 2 |
B | 0 | 15591 | 5 |
C | 0 | 17211 | 2 |
D | 0 | 24420 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6440 | 139 | 2.158385% |
B | 6439 | 147 | 2.282963% |
C | 6439 | 261 | 4.053424% |
D | 6439 | 921 | 14.303463% |
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 | 7599 | 6440 | 82 | 82 | 1.08% | 1.27% |  |
B | 7598 | 6439 | 63 | 63 | 0.83% | 0.98% |  |
C | 7598 | 6439 | 187 | 187 | 2.46% | 2.90% |  |
D | 7598 | 6439 | 859 | 859 | 11.31% | 13.34% |  |
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 | 374077 | 2082.79 | 723 | 706 | 179.3 |
A | 11 | 3 | 297217 | 1654.04 | 723 | 706 | 179.3 |
A | 4 | 3 | 158014 | 877.52 | 723 | 706 | 179.3 |
B | 8 | 128 | 157662 | 1028.08 | 714 | 692 | 152.7 |
B | 10 | 254 | 153305 | 999.54 | 714 | 692 | 152.7 |
B | 4 | 174 | 98941 | 643.48 | 714 | 692 | 152.7 |
C | 13 | 3 | 369929 | 1892.97 | 703 | 698 | 195.1 |
C | 10 | 171 | 223952 | 1144.57 | 703 | 698 | 195.1 |
C | 14 | 245 | 184009 | 939.79 | 703 | 698 | 195.1 |
D | 11 | 129 | 3081571 | 16479.11 | 667 | 642 | 187.0 |
D | 8 | 176 | 642944 | 3435.51 | 667 | 642 | 187.0 |
D | 11 | 176 | 77478 | 410.98 | 667 | 642 | 187.0 |
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 |  |