Observation information
- date-obs: 2025-03-31
- time-obs: 23:38:54.442200000
- date-end: 2025-04-01
- time-end: 02:03:35.415200000
- obs_id: A13_090T01_9000006458
- exposure: 3376.77800584
- 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_9000006458_51427cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51427cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,024,076,160 | 105,212,160 |
Size | 976.6 MB
| 100.3 MB
|
Events in quadrant A | 9,592,834 | 712,357 |
Events in quadrant B | 4,779,022 | 860,160 |
Events in quadrant C | 16,211,414 | 310,951 |
Events in quadrant D | 6,661,549 | 706,778 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 34513 | 6 |
B | 0 | 20206 | 1 |
C | 0 | 54024 | 1 |
D | 0 | 25763 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 1 | 0 |
B | 0 | 1 | 0 |
C | 0 | 1 | 0 |
D | 0 | 1 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 172 | 0 |
B | 0 | 172 | 0 |
C | 0 | 172 | 0 |
D | 0 | 172 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8575 | 1246 | 14.530612% |
B | 8576 | 305 | 3.556437% |
C | 8576 | 5388 | 62.826493% |
D | 8576 | 439 | 5.118937% |
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 | 8680 | 8576 | 979 | 979 | 11.28% | 11.42% |  |
B | 8681 | 8577 | 64 | 64 | 0.74% | 0.75% |  |
C | 8680 | 8576 | 4908 | 4908 | 56.54% | 57.23% |  |
D | 8681 | 8577 | 404 | 404 | 4.65% | 4.71% |  |
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 | 1756359 | 7925.74 | 892 | 871 | 221.5 |
A | 12 | 250 | 1489046 | 6718.86 | 892 | 871 | 221.5 |
A | 7 | 64 | 991733 | 4473.58 | 892 | 871 | 221.5 |
B | 5 | 172 | 253696 | 1251.45 | 937 | 902 | 202.0 |
B | 5 | 185 | 244758 | 1207.2 | 937 | 902 | 202.0 |
B | 7 | 252 | 88135 | 431.84 | 937 | 902 | 202.0 |
C | 4 | 12 | 7914854 | 53145.06 | 542 | 538 | 148.9 |
C | 15 | 179 | 4567894 | 30670.04 | 542 | 538 | 148.9 |
C | 15 | 230 | 736180 | 4939.87 | 542 | 538 | 148.9 |
D | 7 | 80 | 990636 | 3959.19 | 901 | 868 | 250.0 |
D | 8 | 176 | 551754 | 2203.61 | 901 | 868 | 250.0 |
D | 6 | 42 | 340284 | 1357.71 | 901 | 868 | 250.0 |
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 |  |