Observation information
- date-obs: 2025-04-02
- time-obs: 22:37:57.908600000
- date-end: 2025-04-03
- time-end: 00:55:42.883600000
- obs_id: A13_090T01_9000006458
- exposure: 4910.10898012
- 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_51456cztM0_level2.fits
| modeM0/AS1A13_090T01_9000006458_51456cztM0_level2_quad_clean.evt
|
Size (bytes) | 935,415,360 | 98,936,640 |
Size | 892.1 MB
| 94.4 MB
|
Events in quadrant A | 6,824,050 | 715,726 |
Events in quadrant B | 4,425,237 | 803,958 |
Events in quadrant C | 11,667,423 | 441,774 |
Events in quadrant D | 11,085,727 | 473,432 |
Level1 data integrity
Mode M0 |
Quadrant | BADHDUFLAG | Total packets | Discarded packets |
---|
A | 0 | 25954 | 2 |
B | 0 | 18773 | 1 |
C | 0 | 40318 | 1 |
D | 0 | 38547 | 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 | 164 | 0 |
B | 0 | 164 | 0 |
C | 0 | 164 | 0 |
D | 0 | 164 | 0 |
Data saturation
Quadrant | Total seconds | Saturated seconds | Saturation percentage |
---|
A | 8060 | 574 | 7.121588% |
B | 8060 | 203 | 2.518610% |
C | 8060 | 3299 | 40.930521% |
D | 8060 | 2660 | 33.002481% |
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 | 8265 | 8061 | 376 | 376 | 4.55% | 4.66% |  |
B | 8265 | 8061 | 87 | 87 | 1.05% | 1.08% |  |
C | 8265 | 8061 | 2966 | 2966 | 35.89% | 36.79% |  |
D | 8265 | 8061 | 2485 | 2485 | 30.07% | 30.83% |  |
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 | 1406714 | 6671.43 | 848 | 826 | 210.7 |
A | 7 | 64 | 1067658 | 5062.49 | 848 | 826 | 210.7 |
A | 4 | 175 | 189319 | 894.46 | 848 | 826 | 210.7 |
B | 15 | 52 | 217777 | 1171.52 | 866 | 836 | 185.2 |
B | 5 | 185 | 161039 | 865.12 | 866 | 836 | 185.2 |
B | 0 | 171 | 103398 | 553.85 | 866 | 836 | 185.2 |
C | 4 | 12 | 5956429 | 33471.61 | 639 | 632 | 177.9 |
C | 15 | 179 | 2484517 | 13959.45 | 639 | 632 | 177.9 |
C | 13 | 3 | 234578 | 1314.78 | 639 | 632 | 177.9 |
D | 6 | 42 | 4723110 | 23712.15 | 705 | 678 | 199.2 |
D | 8 | 176 | 1940244 | 9738.9 | 705 | 678 | 199.2 |
D | 11 | 176 | 302043 | 1513.21 | 705 | 678 | 199.2 |
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 |  |