Observation information
- date-obs: 2025-04-04
- time-obs: 00:48:07.610700000
- date-end: 2025-04-04
- time-end: 09:59:01.508200000
- obs_id: A13_090T01_9000006458
- exposure: 25380.8881226
- 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_51476cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51476cztM0_level2_quad_clean.evt
|
Size (bytes) | 2,731,504,320 | 418,282,560 |
Size | 2.5 GB
| 398.9 MB
|
Events in quadrant A | 25,870,569 | 2,624,895 |
Events in quadrant B | 16,114,193 | 3,089,239 |
Events in quadrant C | 20,146,068 | 2,659,525 |
Events in quadrant D | 36,588,907 | 2,160,101 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 98197 | 6 |
B | 0 | 69725 | 5 |
C | 0 | 81936 | 5 |
D | 0 | 130110 | 5 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22 | 0 |
B | 0 | 22 | 0 |
C | 0 | 22 | 0 |
D | 0 | 22 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 626 | 0 |
B | 0 | 626 | 0 |
C | 0 | 626 | 0 |
D | 0 | 626 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 30993 | 3375 | 10.889556% |
B | 30993 | 679 | 2.190817% |
C | 30994 | 1964 | 6.336710% |
D | 30994 | 6445 | 20.794347% |
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 | 33053 | 30996 | 1828 | 1828 | 5.53% | 5.90% |  |
B | 33053 | 30997 | 159 | 159 | 0.48% | 0.51% |  |
C | 33054 | 30998 | 1245 | 1245 | 3.77% | 4.02% |  |
D | 33054 | 30997 | 5610 | 5610 | 16.97% | 18.10% |  |
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 | 250 | 6813138 | 8660.21 | 3221 | 3140 | 786.4 |
A | 12 | 3 | 2001164 | 2540.87 | 3221 | 3140 | 786.4 |
A | 5 | 240 | 589716 | 745.94 | 3221 | 3140 | 786.4 |
B | 8 | 128 | 437900 | 611.25 | 3307 | 3180 | 711.2 |
B | 8 | 234 | 433021 | 604.39 | 3307 | 3180 | 711.2 |
B | 10 | 254 | 387544 | 540.45 | 3307 | 3180 | 711.2 |
C | 15 | 215 | 2007756 | 2290.6 | 3208 | 3183 | 875.1 |
C | 13 | 3 | 1903083 | 2170.99 | 3208 | 3183 | 875.1 |
C | 15 | 147 | 946635 | 1078.07 | 3208 | 3183 | 875.1 |
D | 8 | 176 | 17461384 | 20709.82 | 2994 | 2890 | 843.0 |
D | 6 | 42 | 1609161 | 1905.41 | 2994 | 2890 | 843.0 |
D | 7 | 60 | 1054539 | 1247.5 | 2994 | 2890 | 843.0 |
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 |  |