Observation information
- date-obs: 2025-04-08
- time-obs: 02:58:35.515000000
- date-end: 2025-04-08
- time-end: 09:25:31.441100000
- obs_id: A13_090T01_9000006458
- exposure: 11493.2233275
- 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_51536cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51536cztM0_level2_quad_clean.evt
|
Size (bytes) | 2,574,158,400 | 246,528,000 |
Size | 2.4 GB
| 235.1 MB
|
Events in quadrant A | 27,084,441 | 1,503,774 |
Events in quadrant B | 12,235,159 | 1,986,022 |
Events in quadrant C | 18,889,442 | 1,658,458 |
Events in quadrant D | 35,520,607 | 918,539 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 94750 | 4 |
B | 0 | 49847 | 4 |
C | 0 | 70259 | 4 |
D | 0 | 119556 | 4 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 30 | 0 |
B | 0 | 30 | 0 |
C | 0 | 30 | 0 |
D | 0 | 30 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 414 | 0 |
B | 0 | 414 | 0 |
C | 0 | 414 | 0 |
D | 0 | 414 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 20267 | 4345 | 21.438792% |
B | 20267 | 589 | 2.906202% |
C | 20267 | 1714 | 8.457098% |
D | 20267 | 9652 | 47.624217% |
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 | 23217 | 20269 | 3133 | 3133 | 13.49% | 15.46% |  |
B | 23217 | 20270 | 182 | 182 | 0.78% | 0.90% |  |
C | 23217 | 20271 | 1285 | 1285 | 5.53% | 6.34% |  |
D | 23217 | 20269 | 8731 | 8731 | 37.61% | 43.08% |  |
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 | 7536840 | 15092.98 | 2039 | 1988 | 499.2 |
A | 7 | 64 | 5017414 | 10046.35 | 2039 | 1988 | 499.2 |
A | 12 | 250 | 2988954 | 5983.16 | 2039 | 1988 | 499.2 |
B | 15 | 52 | 665620 | 1436.09 | 2178 | 2099 | 462.0 |
B | 0 | 171 | 452690 | 975.23 | 2178 | 2099 | 462.0 |
B | 10 | 247 | 451507 | 972.67 | 2178 | 2099 | 462.0 |
C | 3 | 233 | 7255540 | 12384.6 | 2115 | 2093 | 585.7 |
C | 13 | 3 | 882075 | 1502.49 | 2115 | 2093 | 585.7 |
C | 3 | 242 | 580652 | 987.84 | 2115 | 2093 | 585.7 |
D | 8 | 176 | 26926569 | 59390.57 | 1621 | 1562 | 453.4 |
D | 6 | 42 | 482781 | 1061.46 | 1621 | 1562 | 453.4 |
D | 2 | 249 | 313715 | 688.54 | 1621 | 1562 | 453.4 |
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 |  |