Observation information
- date-obs: 2025-04-01
- time-obs: 20:44:55.203700000
- date-end: 2025-04-01
- time-end: 22:53:11.177300000
- obs_id: A13_090T01_9000006458
- exposure: 4168.59501469
- 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_51440cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51440cztM0_level2_quad_clean.evt
|
Size (bytes) | 758,352,960 | 93,562,560 |
Size | 723.2 MB
| 89.2 MB
|
Events in quadrant A | 7,319,678 | 629,396 |
Events in quadrant B | 3,898,008 | 730,638 |
Events in quadrant C | 11,373,335 | 381,294 |
Events in quadrant D | 4,926,104 | 592,754 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 26737 | 2 |
B | 0 | 16622 | 2 |
C | 0 | 38658 | 2 |
D | 0 | 19749 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 5 | 0 |
B | 0 | 5 | 0 |
C | 0 | 5 | 0 |
D | 0 | 5 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 146 | 0 |
B | 0 | 146 | 0 |
C | 0 | 146 | 0 |
D | 0 | 146 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7162 | 648 | 9.047752% |
B | 7161 | 125 | 1.745566% |
C | 7161 | 3271 | 45.677978% |
D | 7161 | 315 | 4.398827% |
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 | 7697 | 7162 | 491 | 491 | 6.38% | 6.86% |  |
B | 7696 | 7162 | 55 | 55 | 0.71% | 0.77% |  |
C | 7696 | 7162 | 3035 | 3035 | 39.44% | 42.38% |  |
D | 7696 | 7162 | 334 | 334 | 4.34% | 4.66% |  |
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 | 2410148 | 13164.53 | 741 | 721 | 183.0 |
A | 7 | 64 | 480558 | 2621.71 | 741 | 721 | 183.0 |
A | 12 | 250 | 475001 | 2591.35 | 741 | 721 | 183.0 |
B | 15 | 52 | 193231 | 1175.3 | 764 | 736 | 163.8 |
B | 5 | 185 | 78584 | 475.31 | 764 | 736 | 163.8 |
B | 4 | 170 | 60980 | 367.83 | 764 | 736 | 163.8 |
C | 4 | 12 | 4586082 | 29621.24 | 558 | 553 | 154.8 |
C | 0 | 176 | 2174664 | 14044.15 | 558 | 553 | 154.8 |
C | 15 | 179 | 1430503 | 9237.08 | 558 | 553 | 154.8 |
D | 3 | 12 | 533946 | 2609.41 | 729 | 701 | 204.4 |
D | 6 | 42 | 407555 | 1990.92 | 729 | 701 | 204.4 |
D | 15 | 234 | 253614 | 1237.62 | 729 | 701 | 204.4 |
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 |  |