Observation information
- date-obs: 2025-04-04
- time-obs: 21:32:13.377400000
- date-end: 2025-04-04
- time-end: 23:46:58.351800000
- obs_id: A13_090T01_9000006458
- exposure: 3720.52931768
- 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_51485cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51485cztM0_level2_quad_clean.evt
|
Size (bytes) | 936,434,880 | 101,113,920 |
Size | 893.1 MB
| 96.4 MB
|
Events in quadrant A | 10,944,101 | 647,845 |
Events in quadrant B | 4,138,761 | 824,181 |
Events in quadrant C | 4,670,761 | 716,389 |
Events in quadrant D | 14,289,389 | 315,865 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 38155 | 1 |
B | 0 | 17933 | 1 |
C | 0 | 19665 | 1 |
D | 0 | 48111 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 1 | 0 |
B | 0 | 2 | 0 |
C | 0 | 2 | 0 |
D | 0 | 2 | 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 | 8021 | 1722 | 21.468645% |
B | 8021 | 179 | 2.231642% |
C | 8021 | 300 | 3.740182% |
D | 8021 | 4483 | 55.890787% |
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 | 8046 | 8022 | 1248 | 1248 | 15.51% | 15.56% |  |
B | 8046 | 8022 | 45 | 45 | 0.56% | 0.56% |  |
C | 8046 | 8022 | 245 | 245 | 3.04% | 3.05% |  |
D | 8045 | 8021 | 4203 | 4203 | 52.24% | 52.40% |  |
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 | 3016182 | 14832.17 | 820 | 799 | 203.3 |
A | 12 | 250 | 1432179 | 7040.72 | 820 | 799 | 203.3 |
A | 7 | 64 | 1204520 | 5920.9 | 820 | 799 | 203.3 |
B | 7 | 252 | 127937 | 676.66 | 873 | 841 | 187.8 |
B | 8 | 128 | 91134 | 480.72 | 873 | 841 | 187.8 |
B | 12 | 32 | 76536 | 403.0 | 873 | 841 | 187.8 |
C | 13 | 3 | 633067 | 2717.55 | 845 | 835 | 232.6 |
C | 1 | 60 | 288700 | 1237.34 | 845 | 835 | 232.6 |
C | 12 | 249 | 162632 | 695.46 | 845 | 835 | 232.6 |
D | 8 | 176 | 9884609 | 60182.84 | 581 | 561 | 164.2 |
D | 3 | 12 | 1210294 | 7365.93 | 581 | 561 | 164.2 |
D | 11 | 176 | 298761 | 1815.71 | 581 | 561 | 164.2 |
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 |  |