Observation information
- date-obs: 2025-04-08
- time-obs: 21:00:18.310700000
- date-end: 2025-04-08
- time-end: 23:14:28.287400000
- obs_id: A13_090T01_9000006458
- exposure: 5527.00774902
- 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_9000006458_51544cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51544cztM0_level2_quad_clean.evt
|
Size (bytes) | 870,180,480 | 104,690,880 |
Size | 829.9 MB
| 99.8 MB
|
Events in quadrant A | 8,486,804 | 704,352 |
Events in quadrant B | 11,865,351 | 567,247 |
Events in quadrant C | 4,073,560 | 728,068 |
Events in quadrant D | 7,163,338 | 610,024 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 30905 | 0 |
B | 0 | 40878 | 3 |
C | 0 | 17872 | 0 |
D | 0 | 26968 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 162 | 0 |
B | 0 | 162 | 0 |
C | 0 | 162 | 0 |
D | 0 | 162 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8050 | 838 | 10.409938% |
B | 8049 | 2883 | 35.818114% |
C | 8049 | 83 | 1.031184% |
D | 8050 | 1006 | 12.496894% |
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 | 8050 | 8050 | 627 | 627 | 7.79% | 7.79% |  |
B | 8049 | 8049 | 2330 | 2330 | 28.95% | 28.95% |  |
C | 8049 | 8049 | 68 | 68 | 0.84% | 0.84% |  |
D | 8050 | 8050 | 911 | 911 | 11.32% | 11.32% |  |
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 | 250 | 1587060 | 7589.48 | 848 | 827 | 209.0 |
A | 12 | 80 | 1519564 | 7266.54 | 848 | 827 | 209.0 |
A | 12 | 3 | 662212 | 3164.46 | 848 | 827 | 209.0 |
B | 10 | 44 | 7484360 | 46006.71 | 753 | 728 | 162.7 |
B | 15 | 52 | 588942 | 3616.13 | 753 | 728 | 162.7 |
B | 6 | 51 | 153627 | 939.97 | 753 | 728 | 162.7 |
C | 13 | 3 | 381363 | 1634.12 | 852 | 844 | 232.9 |
C | 3 | 233 | 109815 | 467.97 | 852 | 844 | 232.9 |
C | 12 | 249 | 41672 | 175.33 | 852 | 844 | 232.9 |
D | 8 | 176 | 2748585 | 12586.25 | 780 | 753 | 218.3 |
D | 12 | 6 | 519108 | 2374.29 | 780 | 753 | 218.3 |
D | 2 | 249 | 223297 | 1019.35 | 780 | 753 | 218.3 |
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 |  |