Observation information
- date-obs: 2025-04-02
- time-obs: 04:52:50.113200000
- date-end: 2025-04-02
- time-end: 11:06:22.041100000
- obs_id: A13_090T01_9000006458
- exposure: 6524.97859019
- 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_51447cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51447cztM0_level2_quad_clean.evt
|
Size (bytes) | 2,498,258,880 | 233,553,600 |
Size | 2.3 GB
| 222.7 MB
|
Events in quadrant A | 21,339,574 | 1,610,032 |
Events in quadrant B | 13,168,067 | 1,870,321 |
Events in quadrant C | 43,111,630 | 586,231 |
Events in quadrant D | 13,281,010 | 1,596,424 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 77685 | 5 |
B | 0 | 53477 | 5 |
C | 0 | 142089 | 5 |
D | 0 | 54297 | 5 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 21 | 0 |
B | 0 | 21 | 0 |
C | 0 | 21 | 0 |
D | 0 | 21 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 412 | 0 |
B | 0 | 412 | 0 |
C | 0 | 412 | 0 |
D | 0 | 412 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 20443 | 3137 | 15.345106% |
B | 20443 | 1619 | 7.919581% |
C | 20443 | 14584 | 71.339823% |
D | 20442 | 1207 | 5.904510% |
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 | 22413 | 20443 | 2439 | 2439 | 10.88% | 11.93% |  |
B | 22413 | 20444 | 899 | 899 | 4.01% | 4.40% |  |
C | 22413 | 20443 | 14030 | 14030 | 62.60% | 68.63% |  |
D | 22412 | 20443 | 874 | 874 | 3.90% | 4.28% |  |
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 | 7 | 64 | 4125751 | 8048.82 | 2098 | 2052 | 512.3 |
A | 12 | 3 | 3598662 | 7020.03 | 2098 | 2052 | 512.3 |
A | 15 | 174 | 1312810 | 2558.4 | 2098 | 2052 | 512.3 |
B | 5 | 185 | 2647798 | 5838.21 | 2135 | 2056 | 453.2 |
B | 0 | 171 | 353443 | 775.39 | 2135 | 2056 | 453.2 |
B | 4 | 206 | 324716 | 711.99 | 2135 | 2056 | 453.2 |
C | 4 | 12 | 30514272 | 97144.42 | 1152 | 1145 | 314.1 |
C | 15 | 179 | 5156729 | 16413.79 | 1152 | 1145 | 314.1 |
C | 3 | 233 | 854988 | 2718.37 | 1152 | 1145 | 314.1 |
D | 6 | 42 | 2350192 | 3951.85 | 2131 | 2050 | 594.2 |
D | 7 | 60 | 620650 | 1041.09 | 2131 | 2050 | 594.2 |
D | 3 | 12 | 438971 | 735.33 | 2131 | 2050 | 594.2 |
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 |  |