Observation information
- date-obs: 2025-04-08
- time-obs: 10:49:52.424400000
- date-end: 2025-04-08
- time-end: 12:53:29.400500000
- obs_id: A13_090T01_9000006458
- exposure: 1662.85056823
- 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_51538cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51538cztM0_level2_quad_clean.evt
|
Size (bytes) | 887,783,040 | 75,516,480 |
Size | 846.7 MB
| 72.0 MB
|
Events in quadrant A | 9,408,738 | 446,156 |
Events in quadrant B | 4,156,708 | 663,045 |
Events in quadrant C | 4,790,828 | 578,642 |
Events in quadrant D | 14,013,532 | 153,638 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 32400 | 1 |
B | 0 | 16597 | 1 |
C | 0 | 18461 | 1 |
D | 0 | 46039 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 10 | 0 |
B | 0 | 10 | 0 |
C | 0 | 10 | 0 |
D | 0 | 10 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 130 | 0 |
B | 0 | 130 | 0 |
C | 0 | 130 | 0 |
D | 0 | 130 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 6372 | 2212 | 34.714375% |
B | 6373 | 275 | 4.315079% |
C | 6373 | 349 | 5.476228% |
D | 6373 | 4947 | 77.624353% |
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 | 7417 | 6372 | 1509 | 1509 | 20.35% | 23.68% |  |
B | 7418 | 6373 | 99 | 99 | 1.33% | 1.55% |  |
C | 7418 | 6373 | 191 | 191 | 2.57% | 3.00% |  |
D | 7418 | 6373 | 4300 | 4300 | 57.97% | 67.47% |  |
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 | 2244303 | 14119.12 | 638 | 622 | 158.9 |
A | 12 | 3 | 1629343 | 10249.28 | 638 | 622 | 158.9 |
A | 7 | 64 | 1431242 | 9002.66 | 638 | 622 | 158.9 |
B | 5 | 185 | 355621 | 2356.62 | 706 | 682 | 150.6 |
B | 0 | 171 | 213859 | 1415.39 | 706 | 682 | 150.6 |
B | 15 | 52 | 174843 | 1156.34 | 706 | 682 | 150.6 |
C | 3 | 233 | 764216 | 4040.25 | 688 | 680 | 189.0 |
C | 13 | 3 | 700558 | 3703.41 | 688 | 680 | 189.0 |
C | 3 | 242 | 419807 | 2217.81 | 688 | 680 | 189.0 |
D | 8 | 176 | 11754935 | 117010.92 | 361 | 348 | 100.5 |
D | 12 | 6 | 577187 | 5742.14 | 361 | 348 | 100.5 |
D | 8 | 160 | 46777 | 462.18 | 361 | 348 | 100.5 |
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 |  |