Observation information
- date-obs: 2025-04-01
- time-obs: 12:12:17.297400000
- date-end: 2025-04-01
- time-end: 14:15:07.274200000
- obs_id: A13_090T01_9000006458
- exposure: 3601.42503703
- 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_51435cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51435cztM0_level2_quad_clean.evt
|
Size (bytes) | 728,835,840 | 79,632,000 |
Size | 695.1 MB
| 75.9 MB
|
Events in quadrant A | 7,112,280 | 494,992 |
Events in quadrant B | 3,783,914 | 613,454 |
Events in quadrant C | 10,927,745 | 336,761 |
Events in quadrant D | 4,667,400 | 526,303 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 25414 | 1 |
B | 0 | 15567 | 1 |
C | 0 | 36807 | 4 |
D | 0 | 18241 | 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 | 128 | 0 |
B | 0 | 128 | 0 |
C | 0 | 128 | 0 |
D | 0 | 128 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6295 | 1345 | 21.366164% |
B | 6296 | 403 | 6.400889% |
C | 6295 | 2978 | 47.307387% |
D | 6295 | 377 | 5.988880% |
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 | 7370 | 6295 | 1144 | 1144 | 15.52% | 18.17% |  |
B | 7371 | 6296 | 167 | 167 | 2.27% | 2.65% |  |
C | 7370 | 6295 | 2768 | 2768 | 37.56% | 43.97% |  |
D | 7370 | 6295 | 328 | 328 | 4.45% | 5.21% |  |
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 | 7 | 64 | 3170705 | 21121.12 | 609 | 593 | 150.1 |
A | 12 | 250 | 732755 | 4878.09 | 609 | 593 | 150.1 |
A | 12 | 3 | 246160 | 1636.11 | 609 | 593 | 150.1 |
B | 5 | 172 | 495737 | 3591.54 | 647 | 625 | 137.9 |
B | 4 | 206 | 119013 | 858.79 | 647 | 625 | 137.9 |
B | 15 | 52 | 95476 | 688.05 | 647 | 625 | 137.9 |
C | 4 | 12 | 5840052 | 43879.12 | 485 | 481 | 133.1 |
C | 0 | 176 | 1330737 | 9995.68 | 485 | 481 | 133.1 |
C | 10 | 171 | 598921 | 4496.74 | 485 | 481 | 133.1 |
D | 6 | 42 | 780893 | 4266.46 | 650 | 625 | 182.9 |
D | 8 | 176 | 391712 | 2138.44 | 650 | 625 | 182.9 |
D | 8 | 192 | 281461 | 1535.59 | 650 | 625 | 182.9 |
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 |  |