Observation information
- date-obs: 2025-04-21
- time-obs: 16:13:05.121900000
- date-end: 2025-04-21
- time-end: 21:33:27.071100000
- obs_id: A13_090T01_9000006464
- exposure: 10332.6317388
- 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_51736cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51736cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,872,869,760 | 229,979,520 |
Size | 1.7 GB
| 219.3 MB
|
Events in quadrant A | 11,094,019 | 1,667,626 |
Events in quadrant B | 12,778,260 | 1,721,382 |
Events in quadrant C | 14,307,779 | 1,462,660 |
Events in quadrant D | 29,755,414 | 869,023 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 13 | 0 |
B | 0 | 13 | 0 |
C | 0 | 13 | 0 |
D | 0 | 13 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 364 | 0 |
B | 0 | 364 | 0 |
C | 0 | 364 | 0 |
D | 0 | 364 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 45393 | 3 |
B | 0 | 50482 | 3 |
C | 0 | 55142 | 3 |
D | 0 | 100784 | 3 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 18022 | 720 | 3.995117% |
B | 18023 | 1459 | 8.095212% |
C | 18023 | 1954 | 10.841702% |
D | 18023 | 8393 | 46.568274% |
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 | 19222 | 18025 | 473 | 473 | 2.46% | 2.62% |  |
B | 19223 | 18024 | 822 | 822 | 4.28% | 4.56% |  |
C | 19223 | 18025 | 1763 | 1763 | 9.17% | 9.78% |  |
D | 19223 | 18023 | 8050 | 8050 | 41.88% | 44.67% |  |
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 | 0 | 111 | 1296946 | 2717.46 | 1940 | 1895 | 476.6 |
A | 3 | 114 | 330600 | 689.74 | 1940 | 1895 | 476.6 |
A | 4 | 3 | 274144 | 571.27 | 1940 | 1895 | 476.6 |
B | 4 | 206 | 2096232 | 5162.01 | 1898 | 1832 | 405.7 |
B | 4 | 174 | 512148 | 1257.76 | 1898 | 1832 | 405.7 |
B | 8 | 128 | 375984 | 922.16 | 1898 | 1832 | 405.7 |
C | 10 | 22 | 2603022 | 5152.56 | 1821 | 1805 | 504.8 |
C | 13 | 3 | 1092338 | 2160.16 | 1821 | 1805 | 504.8 |
C | 1 | 243 | 997555 | 1972.41 | 1821 | 1805 | 504.8 |
D | 11 | 129 | 15934902 | 38972.7 | 1433 | 1382 | 408.8 |
D | 2 | 249 | 3033875 | 7417.35 | 1433 | 1382 | 408.8 |
D | 8 | 176 | 2247186 | 5493.14 | 1433 | 1382 | 408.8 |
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 |  |