Observation information
- date-obs: 2025-04-05
- time-obs: 03:31:46.314000000
- date-end: 2025-04-05
- time-end: 10:16:16.234700000
- obs_id: A13_090T01_9000006458
- exposure: 17628.1701656
- 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_51492cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51492cztM0_level2_quad_clean.evt
|
Size (bytes) | 2,102,987,520 | 284,466,240 |
Size | 2.0 GB
| 271.3 MB
|
Events in quadrant A | 25,589,278 | 1,662,823 |
Events in quadrant B | 11,377,818 | 2,161,828 |
Events in quadrant C | 11,781,463 | 1,923,883 |
Events in quadrant D | 27,426,644 | 1,371,759 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 91263 | 4 |
B | 0 | 49218 | 4 |
C | 0 | 50696 | 4 |
D | 0 | 96851 | 4 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 28 | 0 |
B | 0 | 28 | 0 |
C | 0 | 28 | 0 |
D | 0 | 28 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 438 | 0 |
B | 0 | 438 | 0 |
C | 0 | 438 | 0 |
D | 0 | 438 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 21678 | 3486 | 16.080819% |
B | 21678 | 513 | 2.366454% |
C | 21679 | 577 | 2.661562% |
D | 21679 | 4607 | 21.250980% |
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 | 24269 | 21677 | 2643 | 2643 | 10.89% | 12.19% |  |
B | 24270 | 21679 | 168 | 168 | 0.69% | 0.77% |  |
C | 24271 | 21679 | 335 | 335 | 1.38% | 1.55% |  |
D | 24271 | 21679 | 4573 | 4573 | 18.84% | 21.09% |  |
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 | 7080690 | 13049.94 | 2211 | 2153 | 542.4 |
A | 12 | 250 | 3904609 | 7194.54 | 2211 | 2153 | 542.4 |
A | 8 | 43 | 1152367 | 2120.52 | 2211 | 2153 | 542.4 |
B | 0 | 213 | 341328 | 694.49 | 2300 | 2217 | 488.3 |
B | 2 | 208 | 254449 | 516.56 | 2300 | 2217 | 488.3 |
B | 0 | 171 | 215171 | 436.12 | 2300 | 2217 | 488.3 |
C | 0 | 177 | 848033 | 1358.05 | 2274 | 2253 | 622.8 |
C | 13 | 3 | 750906 | 1202.1 | 2274 | 2253 | 622.8 |
C | 14 | 245 | 252429 | 401.7 | 2274 | 2253 | 622.8 |
D | 8 | 176 | 13890061 | 23855.22 | 2099 | 2025 | 582.2 |
D | 2 | 216 | 1496748 | 2567.46 | 2099 | 2025 | 582.2 |
D | 7 | 60 | 1073558 | 1840.55 | 2099 | 2025 | 582.2 |
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 |  |