ASTROSAT CZTI

Data Quality Report

Orbit 20171112_A04_021T05_9000001686_level2

Creation date: 2018-01-09T03:38:38.512773
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_021T05_9000001686cztM0_level2_bc.evt modeM0/AS1A04_021T05_9000001686cztM0_level2_quad_clean.evt
Size (bytes)3,716,737,920853,954,560
Size3.5 GB 814.4 MB
Events in quadrant A37,694,5685,024,376
Events in quadrant B33,012,8955,265,836
Events in quadrant C13,125,2525,786,010
Events in quadrant D24,295,0575,313,724

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013300
B013300
C013300
D013300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02438670
B02135630
C01337050
D01721420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A651861061216.279569%
B65186867513.308072%
C651864650.713343%
D6518630184.629828%

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 75227 65183 913 913 1.21% 1.40%
B 75227 65185 1014 1014 1.35% 1.56%
C 75227 65190 1 1 0.00% 0.00%
D 75227 65189 866 866 1.15% 1.33%

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 8 5 24497641 36605.2 3088 3032 669.2
A 15 223 334522 495.38 3088 3032 669.2
A 9 143 209603 308.7 3088 3032 669.2
B 4 81 11522403 19333.7 3147 3063 595.8
B 4 239 5181116 8690.68 3147 3063 595.8
B 3 64 2173654 3643.05 3147 3063 595.8
C 12 4 57326 69.63 3342 3276 776.3
C 13 61 19837 21.33 3342 3276 776.3
C 14 234 13170 12.75 3342 3276 776.3
D 1 52 5501786 7182.7 3275 3152 765.5
D 6 219 1582685 2063.3 3275 3152 765.5
D 8 195 1260346 1642.23 3275 3152 765.5

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