Observation information
- date-obs: 2025-04-06
- time-obs: 18:49:46.871100000
- date-end: 2025-04-06
- time-end: 20:54:06.849400000
- obs_id: A13_090T01_9000006458
- exposure: 4876.98012662
- 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_51513cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51513cztM0_level2_quad_clean.evt
|
Size (bytes) | 663,549,120 | 99,115,200 |
Size | 632.8 MB
| 94.5 MB
|
Events in quadrant A | 5,451,117 | 680,504 |
Events in quadrant B | 4,222,226 | 741,955 |
Events in quadrant C | 4,684,307 | 650,439 |
Events in quadrant D | 9,638,110 | 419,596 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 21127 | 1 |
B | 0 | 17402 | 1 |
C | 0 | 19044 | 1 |
D | 0 | 33748 | 1 |
Mode M9 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 2 | 0 |
B | 0 | 2 | 0 |
C | 0 | 2 | 0 |
D | 0 | 2 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 150 | 0 |
B | 0 | 150 | 0 |
C | 0 | 150 | 0 |
D | 0 | 150 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 7305 | 275 | 3.764545% |
B | 7306 | 167 | 2.285792% |
C | 7306 | 240 | 3.284971% |
D | 7306 | 2512 | 34.382699% |
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 | 7460 | 7307 | 155 | 155 | 2.08% | 2.12% |  |
B | 7461 | 7308 | 20 | 20 | 0.27% | 0.27% |  |
C | 7461 | 7308 | 172 | 172 | 2.31% | 2.35% |  |
D | 7460 | 7306 | 2201 | 2201 | 29.50% | 30.13% |  |
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 | 668950 | 3404.62 | 790 | 768 | 196.3 |
A | 12 | 3 | 658694 | 3352.37 | 790 | 768 | 196.3 |
A | 15 | 174 | 240001 | 1218.98 | 790 | 768 | 196.3 |
B | 15 | 52 | 388184 | 2287.17 | 790 | 762 | 169.4 |
B | 8 | 128 | 100965 | 591.55 | 790 | 762 | 169.4 |
B | 5 | 172 | 91172 | 533.74 | 790 | 762 | 169.4 |
C | 15 | 1 | 606718 | 2865.97 | 767 | 760 | 211.4 |
C | 13 | 3 | 414069 | 1954.8 | 767 | 760 | 211.4 |
C | 12 | 252 | 132110 | 621.24 | 767 | 760 | 211.4 |
D | 8 | 176 | 5735511 | 34567.46 | 594 | 573 | 165.9 |
D | 6 | 228 | 595634 | 3586.74 | 594 | 573 | 165.9 |
D | 11 | 176 | 363366 | 2186.74 | 594 | 573 | 165.9 |
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 |  |