Observation information
- date-obs: 2025-04-25
- time-obs: 20:52:07.106000000
- date-end: 2025-04-25
- time-end: 23:03:21.083700000
- obs_id: A13_090T01_9000006464
- exposure: 4487.26776284
- 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_51797cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006464_51797cztM0_level2_quad_clean.evt
|
Size (bytes) | 800,352,000 | 82,615,680 |
Size | 763.3 MB
| 78.8 MB
|
Events in quadrant A | 8,381,841 | 470,583 |
Events in quadrant B | 4,586,528 | 651,383 |
Events in quadrant C | 6,186,612 | 538,408 |
Events in quadrant D | 9,960,024 | 379,933 |
Level1 data integrity
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 12 | 0 |
B | 0 | 13 | 0 |
C | 0 | 13 | 0 |
D | 0 | 13 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 134 | 0 |
B | 0 | 134 | 0 |
C | 0 | 134 | 0 |
D | 0 | 134 | 0 |
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 29403 | 3 |
B | 0 | 18214 | 2 |
C | 0 | 22869 | 2 |
D | 0 | 34171 | 2 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6610 | 1721 | 26.036309% |
B | 6610 | 375 | 5.673222% |
C | 6610 | 855 | 12.934947% |
D | 6610 | 2433 | 36.807867% |
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 | 7604 | 6610 | 1672 | 1672 | 21.99% | 25.30% |  |
B | 7605 | 6610 | 230 | 230 | 3.02% | 3.48% |  |
C | 7605 | 6611 | 829 | 829 | 10.90% | 12.54% |  |
D | 7605 | 6610 | 2358 | 2358 | 31.01% | 35.67% |  |
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 | 15 | 174 | 4224702 | 27463.85 | 612 | 596 | 153.8 |
A | 12 | 3 | 440457 | 2859.84 | 612 | 596 | 153.8 |
A | 7 | 64 | 293563 | 1904.78 | 612 | 596 | 153.8 |
B | 10 | 128 | 807711 | 5417.99 | 692 | 670 | 149.0 |
B | 4 | 81 | 178075 | 1190.99 | 692 | 670 | 149.0 |
B | 0 | 171 | 169503 | 1133.44 | 692 | 670 | 149.0 |
C | 15 | 218 | 2383313 | 13187.8 | 654 | 650 | 180.7 |
C | 10 | 22 | 456523 | 2523.21 | 654 | 650 | 180.7 |
C | 15 | 192 | 288332 | 1592.29 | 654 | 650 | 180.7 |
D | 11 | 129 | 6248893 | 40521.93 | 554 | 533 | 154.2 |
D | 12 | 6 | 428816 | 2777.51 | 554 | 533 | 154.2 |
D | 8 | 176 | 409632 | 2653.09 | 554 | 533 | 154.2 |
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 |  |