Observation information
- date-obs: 2025-04-27
- time-obs: 21:32:06.628900000
- date-end: 2025-04-27
- time-end: 23:40:14.607400000
- obs_id: A13_090T01_9000006464
- exposure: 2896.4295252
- 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_51827cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51827cztM0_level2_quad_clean.evt
|
Size (bytes) | 827,366,400 | 80,890,560 |
Size | 789.0 MB
| 77.1 MB
|
Events in quadrant A | 5,315,365 | 621,123 |
Events in quadrant B | 12,851,697 | 302,053 |
Events in quadrant C | 4,183,168 | 600,052 |
Events in quadrant D | 7,767,419 | 467,320 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 12 | 0 |
C | 0 | 12 | 0 |
D | 0 | 12 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 132 | 0 |
B | 0 | 132 | 0 |
C | 0 | 132 | 0 |
D | 0 | 132 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20488 | 3 |
B | 0 | 42693 | 2 |
C | 0 | 17141 | 2 |
D | 0 | 27650 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6577 | 191 | 2.904060% |
B | 6577 | 4114 | 62.551315% |
C | 6577 | 207 | 3.147332% |
D | 6577 | 1350 | 20.526076% |
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 | 7657 | 6578 | 144 | 144 | 1.88% | 2.19% |  |
B | 7657 | 6577 | 3200 | 3200 | 41.79% | 48.65% |  |
C | 7657 | 6578 | 177 | 177 | 2.31% | 2.69% |  |
D | 7657 | 6578 | 1200 | 1200 | 15.67% | 18.24% |  |
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 | 1297855 | 7513.83 | 698 | 680 | 172.6 |
A | 15 | 250 | 253757 | 1465.94 | 698 | 680 | 172.6 |
A | 5 | 240 | 209527 | 1209.74 | 698 | 680 | 172.6 |
B | 15 | 54 | 9473989 | 80454.93 | 546 | 525 | 117.7 |
B | 5 | 185 | 337706 | 2863.56 | 546 | 525 | 117.7 |
B | 0 | 171 | 203410 | 1723.03 | 546 | 525 | 117.7 |
C | 7 | 220 | 725312 | 3796.37 | 694 | 689 | 190.9 |
C | 14 | 80 | 158400 | 826.26 | 694 | 689 | 190.9 |
C | 0 | 192 | 141134 | 735.8 | 694 | 689 | 190.9 |
D | 11 | 129 | 3907640 | 22768.46 | 620 | 599 | 171.6 |
D | 8 | 176 | 378548 | 2202.52 | 620 | 599 | 171.6 |
D | 9 | 49 | 373171 | 2171.18 | 620 | 599 | 171.6 |
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 |  |