Observation information
- date-obs: 2025-04-23
- time-obs: 08:12:21.719500000
- date-end: 2025-04-23
- time-end: 10:24:08.696600000
- obs_id: A13_090T01_9000006464
- exposure: 2312.77539229
- 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_51759cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51759cztM0_level2_quad_clean.evt
|
Size (bytes) | 831,778,560 | 88,848,000 |
Size | 793.2 MB
| 84.7 MB
|
Events in quadrant A | 4,771,164 | 666,065 |
Events in quadrant B | 5,292,304 | 700,236 |
Events in quadrant C | 5,334,818 | 614,934 |
Events in quadrant D | 14,824,101 | 199,746 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 6 | 0 |
B | 0 | 6 | 0 |
C | 0 | 6 | 0 |
D | 0 | 6 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 148 | 0 |
B | 0 | 148 | 0 |
C | 0 | 148 | 0 |
D | 0 | 148 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19104 | 1 |
B | 0 | 20700 | 1 |
C | 0 | 20980 | 1 |
D | 0 | 49122 | 7 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7312 | 296 | 4.048140% |
B | 7313 | 646 | 8.833584% |
C | 7313 | 815 | 11.144537% |
D | 7312 | 5220 | 71.389497% |
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 | 7907 | 7313 | 26 | 26 | 0.33% | 0.36% |  |
B | 7908 | 7314 | 266 | 266 | 3.36% | 3.64% |  |
C | 7908 | 7313 | 443 | 443 | 5.60% | 6.06% |  |
D | 7907 | 7311 | 4072 | 4072 | 51.50% | 55.70% |  |
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 | 3 | 14 | 1104841 | 5720.4 | 801 | 784 | 193.0 |
A | 4 | 3 | 82261 | 422.15 | 801 | 784 | 193.0 |
A | 5 | 240 | 58219 | 297.59 | 801 | 784 | 193.0 |
B | 4 | 206 | 1124367 | 6600.77 | 787 | 757 | 170.2 |
B | 1 | 223 | 282316 | 1654.05 | 787 | 757 | 170.2 |
B | 7 | 252 | 126674 | 739.71 | 787 | 757 | 170.2 |
C | 15 | 230 | 1739060 | 8496.62 | 754 | 749 | 204.6 |
C | 13 | 3 | 109648 | 532.28 | 754 | 749 | 204.6 |
C | 15 | 189 | 78751 | 381.26 | 754 | 749 | 204.6 |
D | 11 | 129 | 12295115 | 100297.21 | 438 | 420 | 122.6 |
D | 8 | 176 | 608210 | 4958.21 | 438 | 420 | 122.6 |
D | 12 | 32 | 50374 | 407.51 | 438 | 420 | 122.6 |
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 |  |