Observation information
- date-obs: 2025-04-03
- time-obs: 12:41:37.745900000
- date-end: 2025-04-03
- time-end: 14:52:21.720200000
- obs_id: A13_090T01_9000006458
- exposure: 4511.9377411
- 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_51465cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51465cztM0_level2_quad_clean.evt
|
Size (bytes) | 742,953,600 | 92,675,520 |
Size | 708.5 MB
| 88.4 MB
|
Events in quadrant A | 8,444,447 | 577,879 |
Events in quadrant B | 5,085,528 | 709,642 |
Events in quadrant C | 3,756,975 | 638,665 |
Events in quadrant D | 9,692,232 | 408,707 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 29761 | 2 |
B | 0 | 19646 | 3 |
C | 0 | 15980 | 2 |
D | 0 | 33479 | 2 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 11 | 0 |
B | 0 | 11 | 0 |
C | 0 | 11 | 0 |
D | 0 | 11 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 138 | 0 |
B | 0 | 138 | 0 |
C | 0 | 138 | 0 |
D | 0 | 138 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6755 | 1297 | 19.200592% |
B | 6754 | 316 | 4.678709% |
C | 6754 | 197 | 2.916790% |
D | 6754 | 2409 | 35.667752% |
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 | 7845 | 6756 | 1155 | 1155 | 14.72% | 17.10% |  |
B | 7844 | 6755 | 98 | 98 | 1.25% | 1.45% |  |
C | 7844 | 6755 | 115 | 115 | 1.47% | 1.70% |  |
D | 7844 | 6754 | 2034 | 2034 | 25.93% | 30.12% |  |
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 | 8 | 249 | 2324077 | 12952.41 | 731 | 716 | 179.4 |
A | 4 | 175 | 1109026 | 6178.67 | 731 | 716 | 179.4 |
A | 12 | 3 | 798273 | 4446.27 | 731 | 716 | 179.4 |
B | 10 | 254 | 1239281 | 7781.67 | 746 | 720 | 159.2 |
B | 4 | 206 | 390835 | 2451.03 | 746 | 720 | 159.2 |
B | 8 | 234 | 57873 | 359.08 | 746 | 720 | 159.2 |
C | 13 | 3 | 363705 | 1785.46 | 735 | 730 | 203.3 |
C | 12 | 250 | 297623 | 1460.41 | 735 | 730 | 203.3 |
C | 14 | 254 | 72923 | 355.12 | 735 | 730 | 203.3 |
D | 8 | 176 | 3367158 | 19851.59 | 610 | 587 | 169.6 |
D | 3 | 12 | 2680594 | 15803.14 | 610 | 587 | 169.6 |
D | 15 | 94 | 417461 | 2458.17 | 610 | 587 | 169.6 |
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 |  |