Observation information
- date-obs: 2025-04-27
- time-obs: 11:05:06.729000000
- date-end: 2025-04-27
- time-end: 13:18:01.708700000
- obs_id: A13_090T01_9000006464
- exposure: 6852.37892133
- 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_51820cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51820cztM0_level2_quad_clean.evt
|
Size (bytes) | 822,623,040 | 106,997,760 |
Size | 784.5 MB
| 102.0 MB
|
Events in quadrant A | 7,112,351 | 665,962 |
Events in quadrant B | 7,609,863 | 729,530 |
Events in quadrant C | 6,575,572 | 706,136 |
Events in quadrant D | 8,537,029 | 583,318 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 160 | 0 |
B | 0 | 160 | 0 |
C | 0 | 160 | 0 |
D | 0 | 160 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 26469 | 0 |
B | 0 | 28073 | 0 |
C | 0 | 25131 | 0 |
D | 0 | 30879 | 3 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7975 | 911 | 11.423197% |
B | 7976 | 1016 | 12.738215% |
C | 7976 | 273 | 3.422768% |
D | 7975 | 1279 | 16.037618% |
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 | 7975 | 7975 | 766 | 766 | 9.61% | 9.61% |  |
B | 7976 | 7976 | 641 | 641 | 8.04% | 8.04% |  |
C | 7976 | 7976 | 189 | 189 | 2.37% | 2.37% |  |
D | 7975 | 7975 | 1016 | 1016 | 12.74% | 12.74% |  |
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 | 1937789 | 9514.03 | 828 | 807 | 203.6 |
A | 12 | 3 | 528629 | 2592.55 | 828 | 807 | 203.6 |
A | 3 | 14 | 384277 | 1883.52 | 828 | 807 | 203.6 |
B | 10 | 128 | 2164887 | 12065.5 | 829 | 798 | 179.4 |
B | 1 | 223 | 822712 | 4582.44 | 829 | 798 | 179.4 |
B | 5 | 32 | 394767 | 2196.51 | 829 | 798 | 179.4 |
C | 15 | 192 | 784324 | 3404.34 | 841 | 834 | 230.1 |
C | 10 | 252 | 650311 | 2822.04 | 841 | 834 | 230.1 |
C | 9 | 38 | 436359 | 1892.4 | 841 | 834 | 230.1 |
D | 11 | 129 | 2926030 | 13509.51 | 785 | 761 | 216.5 |
D | 3 | 12 | 816576 | 3767.61 | 785 | 761 | 216.5 |
D | 12 | 6 | 620812 | 2863.53 | 785 | 761 | 216.5 |
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 |  |