Observation information
- date-obs: 2025-04-27
- time-obs: 07:39:53.761400000
- date-end: 2025-04-27
- time-end: 09:49:25.741300000
- obs_id: A13_090T01_9000006464
- exposure: 3738.37906468
- 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_51818cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51818cztM0_level2_quad_clean.evt
|
Size (bytes) | 794,782,080 | 97,246,080 |
Size | 758.0 MB
| 92.7 MB
|
Events in quadrant A | 5,157,321 | 672,617 |
Events in quadrant B | 4,894,538 | 740,234 |
Events in quadrant C | 4,786,459 | 673,214 |
Events in quadrant D | 13,981,515 | 319,900 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 156 | 0 |
B | 0 | 156 | 0 |
C | 0 | 156 | 0 |
D | 0 | 156 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 20572 | 1 |
B | 0 | 19742 | 1 |
C | 0 | 19716 | 1 |
D | 0 | 46904 | 1 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7737 | 569 | 7.354272% |
B | 7738 | 504 | 6.513311% |
C | 7738 | 455 | 5.880072% |
D | 7738 | 4237 | 54.755751% |
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 | 7772 | 7738 | 137 | 137 | 1.76% | 1.77% |  |
B | 7773 | 7739 | 59 | 59 | 0.76% | 0.76% |  |
C | 7773 | 7739 | 197 | 197 | 2.53% | 2.55% |  |
D | 7773 | 7738 | 3567 | 3567 | 45.89% | 46.10% |  |
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 | 15 | 174 | 883436 | 4244.36 | 855 | 834 | 207.9 |
A | 10 | 253 | 270098 | 1294.87 | 855 | 834 | 207.9 |
A | 5 | 240 | 106864 | 509.89 | 855 | 834 | 207.9 |
B | 10 | 128 | 473624 | 2569.62 | 852 | 819 | 184.0 |
B | 5 | 32 | 262458 | 1421.97 | 852 | 819 | 184.0 |
B | 0 | 143 | 153479 | 829.68 | 852 | 819 | 184.0 |
C | 15 | 218 | 500988 | 2181.96 | 849 | 841 | 229.2 |
C | 12 | 254 | 250191 | 1087.82 | 849 | 841 | 229.2 |
C | 0 | 192 | 142639 | 618.61 | 849 | 841 | 229.2 |
D | 11 | 129 | 9655385 | 57247.79 | 615 | 593 | 168.6 |
D | 0 | 18 | 824160 | 4883.31 | 615 | 593 | 168.6 |
D | 8 | 48 | 688909 | 4081.35 | 615 | 593 | 168.6 |
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 |  |