Observation information
- date-obs: 2025-04-05
- time-obs: 23:33:30.891400000
- date-end: 2025-04-06
- time-end: 05:07:20.027200000
- obs_id: A13_090T01_9000006458
- exposure: 9401.51798165
- 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_51505cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51505cztM0_level2_quad_clean.evt
|
Size (bytes) | 2,395,108,800 | 228,882,240 |
Size | 2.2 GB
| 218.3 MB
|
Events in quadrant A | 16,672,241 | 1,625,266 |
Events in quadrant B | 35,012,362 | 937,980 |
Events in quadrant C | 14,649,959 | 1,624,273 |
Events in quadrant D | 20,830,547 | 1,404,552 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 62893 | 3 |
B | 0 | 117383 | 3 |
C | 0 | 56722 | 3 |
D | 0 | 75305 | 10 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 7 | 0 |
B | 0 | 7 | 0 |
C | 0 | 7 | 0 |
D | 0 | 7 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 394 | 0 |
B | 0 | 394 | 0 |
C | 0 | 394 | 0 |
D | 0 | 394 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 19405 | 2196 | 11.316671% |
B | 19406 | 10821 | 55.761105% |
C | 19406 | 1457 | 7.507987% |
D | 19405 | 2366 | 12.192734% |
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 | 20030 | 19407 | 1619 | 1619 | 8.08% | 8.34% |  |
B | 20031 | 19406 | 9446 | 9446 | 47.16% | 48.68% |  |
C | 20031 | 19407 | 1174 | 1174 | 5.86% | 6.05% |  |
D | 20031 | 19406 | 2259 | 2259 | 11.28% | 11.64% |  |
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 | 250 | 3060386 | 6157.54 | 2028 | 1977 | 496.7 |
A | 15 | 174 | 1319870 | 2653.33 | 2028 | 1977 | 496.7 |
A | 8 | 43 | 1307331 | 2628.09 | 2028 | 1977 | 496.7 |
B | 4 | 81 | 26129760 | 76835.51 | 1586 | 1528 | 340.1 |
B | 2 | 208 | 773936 | 2271.43 | 1586 | 1528 | 340.1 |
B | 0 | 171 | 404014 | 1183.59 | 1586 | 1528 | 340.1 |
C | 15 | 205 | 2335551 | 4209.73 | 2016 | 2003 | 554.3 |
C | 12 | 247 | 985598 | 1774.41 | 2016 | 2003 | 554.3 |
C | 0 | 177 | 915671 | 1648.26 | 2016 | 2003 | 554.3 |
D | 8 | 176 | 7921275 | 14521.97 | 1954 | 1886 | 545.3 |
D | 7 | 60 | 1535396 | 2812.03 | 1954 | 1886 | 545.3 |
D | 6 | 42 | 1462606 | 2678.56 | 1954 | 1886 | 545.3 |
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 |  |