Observation information
- date-obs: 2025-04-07
- time-obs: 03:13:09.782800000
- date-end: 2025-04-07
- time-end: 03:57:13.775000000
- obs_id: A13_090T01_9000006458
- exposure: 219.050567091
- 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_51519cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51519cztM0_level2_quad_clean.evt
|
Size (bytes) | 34,937,280 | 4,317,120 |
Size | 33.3 MB
| 4.1 MB
|
Events in quadrant A | 310,502 | 20,412 |
Events in quadrant B | 314,670 | 26,241 |
Events in quadrant C | 302,519 | 22,033 |
Events in quadrant D | 322,174 | 18,102 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 13328 | 12094 |
B | 0 | 10116 | 8818 |
C | 0 | 10228 | 9008 |
D | 0 | 14416 | 13154 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 8 | 8 |
B | 0 | 6 | 6 |
C | 0 | 9 | 9 |
D | 0 | 9 | 9 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 88 | 69 |
B | 0 | 80 | 62 |
C | 0 | 86 | 75 |
D | 0 | 90 | 75 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 471 | 11 | 2.335456% |
B | 570 | 2 | 0.350877% |
C | 540 | 3 | 0.555556% |
D | 442 | 16 | 3.619910% |
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 | 5195 | 745 | 1 | 1 | 0.02% | 0.13% |  |
B | 5211 | 863 | 1 | 1 | 0.02% | 0.12% |  |
C | 5212 | 836 | 2 | 2 | 0.04% | 0.24% |  |
D | 5206 | 690 | 8 | 8 | 0.15% | 1.16% |  |
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 | 39797 | 2777.12 | 49 | 47 | 14.3 |
A | 12 | 250 | 31068 | 2167.27 | 49 | 47 | 14.3 |
A | 15 | 174 | 21190 | 1477.15 | 49 | 47 | 14.3 |
B | 5 | 185 | 20480 | 1349.68 | 60 | 59 | 15.1 |
B | 15 | 52 | 12536 | 824.64 | 60 | 59 | 15.1 |
B | 0 | 171 | 10183 | 669.12 | 60 | 59 | 15.1 |
C | 3 | 233 | 41077 | 2427.2 | 55 | 54 | 16.9 |
C | 13 | 3 | 19441 | 1147.07 | 55 | 54 | 16.9 |
C | 15 | 205 | 5853 | 343.11 | 55 | 54 | 16.9 |
D | 8 | 176 | 34563 | 2555.88 | 43 | 41 | 13.5 |
D | 11 | 176 | 31218 | 2308.22 | 43 | 41 | 13.5 |
D | 7 | 60 | 29775 | 2201.39 | 43 | 41 | 13.5 |
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 |  |