Observation information
- date-obs: 2025-04-27
- time-obs: 00:30:26.831200000
- date-end: 2025-04-27
- time-end: 02:54:42.806100000
- obs_id: A13_090T01_9000006464
- exposure: 6512.29020941
- 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_51814cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51814cztM0_level2_quad_clean.evt
|
Size (bytes) | 512,732,160 | 101,784,960 |
Size | 489.0 MB
| 97.1 MB
|
Events in quadrant A | 5,055,965 | 659,221 |
Events in quadrant B | 4,091,798 | 716,522 |
Events in quadrant C | 4,120,895 | 641,308 |
Events in quadrant D | 5,183,394 | 590,605 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 17 | 0 |
B | 0 | 18 | 0 |
C | 0 | 18 | 0 |
D | 0 | 18 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 140 | 0 |
B | 0 | 140 | 0 |
C | 0 | 140 | 0 |
D | 0 | 140 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19653 | 3 |
B | 0 | 16869 | 3 |
C | 0 | 16811 | 3 |
D | 0 | 20161 | 4 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6802 | 180 | 2.646281% |
B | 6802 | 246 | 3.616583% |
C | 6802 | 224 | 3.293149% |
D | 6801 | 321 | 4.719894% |
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 | 7956 | 6803 | 121 | 121 | 1.52% | 1.78% |  |
B | 7956 | 6803 | 141 | 141 | 1.77% | 2.07% |  |
C | 7956 | 6803 | 107 | 107 | 1.34% | 1.57% |  |
D | 7955 | 6802 | 230 | 230 | 2.89% | 3.38% |  |
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 | 4 | 175 | 703622 | 3825.64 | 743 | 725 | 183.7 |
A | 12 | 3 | 497621 | 2704.44 | 743 | 725 | 183.7 |
A | 15 | 174 | 304826 | 1655.12 | 743 | 725 | 183.7 |
B | 15 | 54 | 291803 | 1853.46 | 733 | 707 | 157.1 |
B | 10 | 128 | 200915 | 1274.76 | 733 | 707 | 157.1 |
B | 4 | 81 | 176359 | 1118.41 | 733 | 707 | 157.1 |
C | 1 | 3 | 241032 | 1188.42 | 736 | 730 | 202.2 |
C | 12 | 254 | 167923 | 826.86 | 736 | 730 | 202.2 |
C | 9 | 38 | 159924 | 787.3 | 736 | 730 | 202.2 |
D | 11 | 129 | 1428579 | 7117.28 | 718 | 692 | 200.6 |
D | 0 | 18 | 443645 | 2207.89 | 718 | 692 | 200.6 |
D | 9 | 49 | 130230 | 645.68 | 718 | 692 | 200.6 |
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 |  |