Observation information
- date-obs: 2025-04-24
- time-obs: 10:17:54.453500000
- date-end: 2025-04-24
- time-end: 12:24:38.432200000
- obs_id: A13_090T01_9000006464
- exposure: 4326.60488302
- 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_51775cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51775cztM0_level2_quad_clean.evt
|
Size (bytes) | 763,905,600 | 99,204,480 |
Size | 728.5 MB
| 94.6 MB
|
Events in quadrant A | 5,740,892 | 696,320 |
Events in quadrant B | 4,581,327 | 759,121 |
Events in quadrant C | 5,275,075 | 653,955 |
Events in quadrant D | 12,090,783 | 365,181 |
Level1 data integrity
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 152 | 0 |
B | 0 | 152 | 0 |
C | 0 | 152 | 0 |
D | 0 | 152 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22209 | 0 |
B | 0 | 18829 | 1 |
C | 0 | 20739 | 0 |
D | 0 | 41149 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7604 | 246 | 3.235139% |
B | 7603 | 224 | 2.946205% |
C | 7604 | 471 | 6.194108% |
D | 7604 | 3566 | 46.896370% |
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 | 7604 | 7604 | 154 | 154 | 2.03% | 2.03% |  |
B | 7603 | 7603 | 151 | 151 | 1.99% | 1.99% |  |
C | 7604 | 7604 | 344 | 344 | 4.52% | 4.52% |  |
D | 7604 | 7604 | 2756 | 2756 | 36.24% | 36.24% |  |
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 | 3 | 734024 | 3652.67 | 826 | 805 | 200.7 |
A | 15 | 174 | 353482 | 1756.93 | 826 | 805 | 200.7 |
A | 2 | 143 | 340753 | 1693.52 | 826 | 805 | 200.7 |
B | 4 | 206 | 523852 | 2931.22 | 823 | 793 | 178.4 |
B | 5 | 173 | 217191 | 1212.69 | 823 | 793 | 178.4 |
B | 6 | 51 | 107742 | 599.34 | 823 | 793 | 178.4 |
C | 15 | 218 | 1014023 | 4718.01 | 787 | 782 | 214.8 |
C | 9 | 38 | 306507 | 1423.57 | 787 | 782 | 214.8 |
C | 12 | 254 | 190854 | 885.04 | 787 | 782 | 214.8 |
D | 11 | 129 | 9240241 | 57259.1 | 578 | 559 | 161.4 |
D | 10 | 181 | 235267 | 1454.51 | 578 | 559 | 161.4 |
D | 8 | 48 | 53716 | 329.42 | 578 | 559 | 161.4 |
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 |  |