Observation information
- date-obs: 2025-04-02
- time-obs: 01:53:08.146500000
- date-end: 2025-04-02
- time-end: 04:57:24.112700000
- obs_id: A13_090T01_9000006458
- exposure: 3655.47287661
- 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_51446cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51446cztM0_level2_quad_clean.evt
|
Size (bytes) | 1,320,232,320 | 132,586,560 |
Size | 1.2 GB
| 126.4 MB
|
Events in quadrant A | 11,883,429 | 929,281 |
Events in quadrant B | 5,878,158 | 1,101,237 |
Events in quadrant C | 22,923,958 | 325,135 |
Events in quadrant D | 7,330,575 | 892,681 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 43096 | 0 |
B | 0 | 25285 | 0 |
C | 0 | 75700 | 4 |
D | 0 | 29779 | 0 |
Mode SS |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 222 | 0 |
B | 0 | 222 | 0 |
C | 0 | 222 | 0 |
D | 0 | 222 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 11056 | 1180 | 10.672938% |
B | 11056 | 167 | 1.510492% |
C | 11056 | 8015 | 72.494573% |
D | 11056 | 421 | 3.807887% |
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 | 11056 | 11056 | 1016 | 1016 | 9.19% | 9.19% |  |
B | 11056 | 11056 | 104 | 104 | 0.94% | 0.94% |  |
C | 11055 | 11055 | 7250 | 7250 | 65.58% | 65.58% |  |
D | 11056 | 11056 | 444 | 444 | 4.02% | 4.02% |  |
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 | 3 | 3585353 | 12808.95 | 1127 | 1099 | 279.8 |
A | 15 | 174 | 1082195 | 3863.48 | 1127 | 1099 | 279.8 |
A | 7 | 64 | 968896 | 3458.59 | 1127 | 1099 | 279.8 |
B | 4 | 206 | 333813 | 1343.94 | 1158 | 1117 | 247.6 |
B | 7 | 252 | 139974 | 560.92 | 1158 | 1117 | 247.6 |
B | 0 | 171 | 106091 | 424.05 | 1158 | 1117 | 247.6 |
C | 15 | 179 | 11795214 | 61241.64 | 697 | 693 | 192.6 |
C | 4 | 12 | 6427605 | 33370.97 | 697 | 693 | 192.6 |
C | 10 | 171 | 850579 | 4412.93 | 697 | 693 | 192.6 |
D | 7 | 60 | 1400321 | 4463.06 | 1124 | 1083 | 313.5 |
D | 7 | 96 | 271385 | 862.17 | 1124 | 1083 | 313.5 |
D | 2 | 153 | 194850 | 618.05 | 1124 | 1083 | 313.5 |
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 |  |