Observation information
- date-obs: 2025-04-04
- time-obs: 16:28:44.432900000
- date-end: 2025-04-04
- time-end: 18:32:40.406900000
- obs_id: A13_090T01_9000006458
- exposure: 4252.48379529
- 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_51482cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51482cztM0_level2_quad_clean.evt
|
Size (bytes) | 713,710,080 | 85,302,720 |
Size | 680.6 MB
| 81.4 MB
|
Events in quadrant A | 8,936,708 | 514,538 |
Events in quadrant B | 3,426,979 | 660,090 |
Events in quadrant C | 4,084,706 | 584,880 |
Events in quadrant D | 9,472,756 | 374,251 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 30979 | 1 |
B | 0 | 14558 | 1 |
C | 0 | 16645 | 1 |
D | 0 | 32717 | 3 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 10 | 0 |
C | 0 | 10 | 0 |
D | 0 | 10 | 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 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6431 | 1383 | 21.505209% |
B | 6431 | 180 | 2.798943% |
C | 6432 | 259 | 4.026741% |
D | 6431 | 2360 | 36.697248% |
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 | 7436 | 6432 | 1074 | 1074 | 14.44% | 16.70% |  |
B | 7436 | 6431 | 45 | 45 | 0.61% | 0.70% |  |
C | 7437 | 6433 | 183 | 183 | 2.46% | 2.84% |  |
D | 7435 | 6431 | 2286 | 2286 | 30.75% | 35.55% |  |
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 | 3264622 | 20317.1 | 657 | 642 | 160.7 |
A | 15 | 174 | 1770114 | 11014.33 | 657 | 642 | 160.7 |
A | 12 | 194 | 378114 | 2349.63 | 657 | 642 | 160.7 |
B | 7 | 252 | 102653 | 681.89 | 699 | 674 | 149.6 |
B | 12 | 32 | 89270 | 592.41 | 699 | 674 | 149.6 |
B | 0 | 245 | 58550 | 386.99 | 699 | 674 | 149.6 |
C | 13 | 3 | 672332 | 3591.41 | 681 | 675 | 187.0 |
C | 10 | 171 | 475225 | 2537.46 | 681 | 675 | 187.0 |
C | 14 | 254 | 102783 | 545.98 | 681 | 675 | 187.0 |
D | 8 | 176 | 3551125 | 22790.56 | 560 | 542 | 155.8 |
D | 3 | 12 | 3223771 | 20689.33 | 560 | 542 | 155.8 |
D | 11 | 176 | 174250 | 1115.0 | 560 | 542 | 155.8 |
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 |  |