Observation information
- date-obs: 2017-10-04
- time-obs: 03:33:14.462400000
- date-end: 2017-10-04
- time-end: 05:53:03.458700000
- obs_id: A04_055T02_9000001576
- exposure: 3481.69277526
- sourceid: 4U 1820-30
- observer: sudip
- ra_pnt: 275.919
- dec_pnt: -30.36128
Basic statistics of files
| Param |
Original file |
Final file |
| Filename | modeM0/AS1A04_055T02_9000001576_10910cztM0_level2.evt
| modeM0/AS1A04_055T02_9000001576_10910cztM0_level2_quad_clean.evt
|
| Size (bytes) | 496,272,960 | 71,406,720 |
| Size | 473.3 MB
| 68.1 MB
|
| Events in quadrant A | 3,531,910 | 431,983 |
| Events in quadrant B | 4,500,317 | 427,064 |
| Events in quadrant C | 3,083,033 | 433,348 |
| Events in quadrant D | 3,469,223 | 412,208 |
Level1 data integrity
| Mode M9 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 18 | 0 |
| B | 0 | 18 | 0 |
| C | 0 | 18 | 0 |
| D | 0 | 19 | 0 |
| Mode SS |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 132 | 0 |
| B | 0 | 132 | 0 |
| C | 0 | 132 | 0 |
| D | 0 | 132 | 0 |
| Mode M0 |
| Quadrant | BADHDUFLAG | Total packets | Discarded packets |
|---|
| A | 0 | 14466 | 3 |
| B | 0 | 17571 | 2 |
| C | 0 | 13538 | 2 |
| D | 0 | 14602 | 2 |
Data saturation
| Quadrant | Total seconds | Saturated seconds | Saturation percentage |
|---|
| A | 6563 | 89 | 1.356087% |
| B | 6563 | 421 | 6.414749% |
| C | 6563 | 70 | 1.066585% |
| D | 6563 | 59 | 0.898979% |
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 | 7633 | 6563 | 1 | 1 | 0.01% | 0.02% |  |
| B | 7633 | 6563 | 191 | 191 | 2.50% | 2.91% |  |
| C | 7633 | 6563 | 0 | 0 | 0.00% | 0.00% |  |
| D | 7633 | 6563 | 5 | 5 | 0.07% | 0.08% |  |
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 | 13 | 251 | 362215 | 2187.42 | 813 | 797 | 165.2 |
| A | 15 | 174 | 8265 | 45.2 | 813 | 797 | 165.2 |
| A | 13 | 14 | 8185 | 44.71 | 813 | 797 | 165.2 |
| B | 4 | 239 | 1301374 | 8643.35 | 797 | 779 | 150.5 |
| B | 0 | 214 | 34953 | 227.11 | 797 | 779 | 150.5 |
| B | 3 | 208 | 18231 | 115.98 | 797 | 779 | 150.5 |
| C | 13 | 61 | 5877 | 27.8 | 789 | 791 | 183.0 |
| C | 12 | 4 | 3556 | 15.11 | 789 | 791 | 183.0 |
| C | 8 | 222 | 1994 | 6.57 | 789 | 791 | 183.0 |
| D | 1 | 52 | 293831 | 1566.27 | 782 | 760 | 187.1 |
| D | 8 | 195 | 89101 | 472.12 | 782 | 760 | 187.1 |
| D | 13 | 249 | 31533 | 164.46 | 782 | 760 | 187.1 |
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 |  |