Observation information
- date-obs: 2025-04-21
- time-obs: 22:54:54.569600000
- date-end: 2025-04-22
- time-end: 01:27:10.031100000
- obs_id: A13_090T01_9000006464
- exposure: 5826.69216454
- 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_51739cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51739cztM0_level2_quad_clean.evt
|
Size (bytes) | 730,232,640 | 103,008,960 |
Size | 696.4 MB
| 98.2 MB
|
Events in quadrant A | 5,848,518 | 690,658 |
Events in quadrant B | 4,292,213 | 755,816 |
Events in quadrant C | 6,596,318 | 659,313 |
Events in quadrant D | 9,729,718 | 504,801 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 19 | 0 |
B | 0 | 19 | 0 |
C | 0 | 19 | 0 |
D | 0 | 19 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 150 | 0 |
B | 0 | 150 | 0 |
C | 0 | 150 | 0 |
D | 0 | 150 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 22399 | 2 |
B | 0 | 17682 | 2 |
C | 0 | 24680 | 2 |
D | 0 | 33989 | 3 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7301 | 211 | 2.890015% |
B | 7302 | 191 | 2.615722% |
C | 7302 | 277 | 3.793481% |
D | 7301 | 1790 | 24.517189% |
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 | 9136 | 7302 | 138 | 138 | 1.51% | 1.89% |  |
B | 9137 | 7304 | 109 | 109 | 1.19% | 1.49% |  |
C | 9137 | 7303 | 245 | 245 | 2.68% | 3.35% |  |
D | 9136 | 7301 | 1839 | 1839 | 20.13% | 25.19% |  |
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 | 1461181 | 7612.07 | 780 | 764 | 191.9 |
A | 13 | 248 | 341534 | 1776.18 | 780 | 764 | 191.9 |
A | 12 | 3 | 142595 | 739.26 | 780 | 764 | 191.9 |
B | 10 | 254 | 312539 | 1850.29 | 781 | 753 | 168.5 |
B | 4 | 174 | 174042 | 1028.38 | 781 | 753 | 168.5 |
B | 4 | 206 | 125140 | 738.17 | 781 | 753 | 168.5 |
C | 3 | 242 | 2395574 | 11451.1 | 762 | 756 | 209.1 |
C | 9 | 38 | 250417 | 1193.78 | 762 | 756 | 209.1 |
C | 13 | 3 | 223465 | 1064.91 | 762 | 756 | 209.1 |
D | 11 | 129 | 5075098 | 26303.24 | 680 | 655 | 192.9 |
D | 8 | 176 | 1462650 | 7578.21 | 680 | 655 | 192.9 |
D | 2 | 120 | 115327 | 594.4 | 680 | 655 | 192.9 |
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 |  |