Observation information
- date-obs: 2025-04-24
- time-obs: 05:03:53.507000000
- date-end: 2025-04-24
- time-end: 07:08:02.486000000
- obs_id: A13_090T01_9000006464
- exposure: 4006.26463169
- 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_51772cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51772cztM0_level2_quad_clean.evt
|
Size (bytes) | 659,733,120 | 87,690,240 |
Size | 629.2 MB
| 83.6 MB
|
Events in quadrant A | 4,266,449 | 611,730 |
Events in quadrant B | 5,510,470 | 634,484 |
Events in quadrant C | 4,607,496 | 598,272 |
Events in quadrant D | 9,542,463 | 365,718 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 128 | 0 |
B | 0 | 128 | 0 |
C | 0 | 128 | 0 |
D | 0 | 128 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 17007 | 1 |
B | 0 | 20752 | 1 |
C | 0 | 17893 | 1 |
D | 0 | 32643 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6379 | 277 | 4.342373% |
B | 6379 | 634 | 9.938862% |
C | 6379 | 258 | 4.044521% |
D | 6380 | 2564 | 40.188088% |
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 | 7449 | 6380 | 131 | 131 | 1.76% | 2.05% |  |
B | 7449 | 6379 | 375 | 375 | 5.03% | 5.88% |  |
C | 7449 | 6380 | 198 | 198 | 2.66% | 3.10% |  |
D | 7450 | 6380 | 2236 | 2236 | 30.01% | 35.05% |  |
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 | 2 | 143 | 373997 | 2178.41 | 704 | 687 | 171.4 |
A | 7 | 206 | 290286 | 1689.92 | 704 | 687 | 171.4 |
A | 12 | 3 | 140715 | 817.12 | 704 | 687 | 171.4 |
B | 4 | 206 | 1601490 | 10926.76 | 683 | 658 | 146.5 |
B | 4 | 174 | 408300 | 2782.43 | 683 | 658 | 146.5 |
B | 10 | 44 | 195933 | 1332.88 | 683 | 658 | 146.5 |
C | 15 | 218 | 388752 | 2035.42 | 692 | 687 | 190.7 |
C | 12 | 2 | 379403 | 1986.39 | 692 | 687 | 190.7 |
C | 1 | 243 | 220263 | 1151.69 | 692 | 687 | 190.7 |
D | 11 | 129 | 6902112 | 44943.18 | 555 | 536 | 153.6 |
D | 0 | 18 | 84487 | 546.69 | 555 | 536 | 153.6 |
D | 7 | 159 | 79907 | 516.87 | 555 | 536 | 153.6 |
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 |  |