Observation information
- date-obs: 2025-04-03
- time-obs: 17:55:32.686700000
- date-end: 2025-04-03
- time-end: 20:00:40.657900000
- obs_id: A13_090T01_9000006458
- exposure: 4450.76469147
- 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_51468cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51468cztM0_level2_quad_clean.evt
|
Size (bytes) | 656,879,040 | 89,637,120 |
Size | 626.4 MB
| 85.5 MB
|
Events in quadrant A | 5,685,753 | 613,374 |
Events in quadrant B | 5,201,668 | 651,179 |
Events in quadrant C | 3,208,826 | 606,345 |
Events in quadrant D | 9,711,248 | 385,440 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 21449 | 1 |
B | 0 | 19873 | 1 |
C | 0 | 14337 | 1 |
D | 0 | 33419 | 1 |
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 | 134 | 0 |
B | 0 | 134 | 0 |
C | 0 | 134 | 0 |
D | 0 | 134 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6558 | 353 | 5.382739% |
B | 6559 | 457 | 6.967526% |
C | 6559 | 58 | 0.884281% |
D | 6559 | 2361 | 35.996341% |
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 | 7508 | 6559 | 190 | 190 | 2.53% | 2.90% |  |
B | 7509 | 6560 | 284 | 284 | 3.78% | 4.33% |  |
C | 7509 | 6560 | 39 | 39 | 0.52% | 0.59% |  |
D | 7508 | 6559 | 1869 | 1869 | 24.89% | 28.50% |  |
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 | 1690522 | 9664.3 | 706 | 688 | 174.9 |
A | 12 | 250 | 253045 | 1443.25 | 706 | 688 | 174.9 |
A | 12 | 194 | 199865 | 1139.11 | 706 | 688 | 174.9 |
B | 10 | 254 | 1570892 | 10429.62 | 701 | 677 | 150.6 |
B | 0 | 213 | 200285 | 1325.83 | 701 | 677 | 150.6 |
B | 4 | 206 | 125293 | 827.72 | 701 | 677 | 150.6 |
C | 13 | 3 | 198224 | 1026.93 | 695 | 691 | 192.4 |
C | 10 | 19 | 67707 | 348.4 | 695 | 691 | 192.4 |
C | 12 | 252 | 61536 | 316.32 | 695 | 691 | 192.4 |
D | 8 | 176 | 6582470 | 43326.55 | 545 | 526 | 151.9 |
D | 13 | 170 | 234948 | 1543.11 | 545 | 526 | 151.9 |
D | 12 | 218 | 232430 | 1526.54 | 545 | 526 | 151.9 |
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 |  |