ASTROSAT CZTI

Data Quality Report

Orbit 20171113_A04_021T06_9000001688_level2

Creation date: 2018-01-09T04:01:07.261503
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_021T06_9000001688cztM0_level2_bc.evt modeM0/AS1A04_021T06_9000001688cztM0_level2_quad_clean.evt
Size (bytes)3,144,191,040838,460,160
Size2.9 GB 799.6 MB
Events in quadrant A33,630,1444,785,830
Events in quadrant B22,546,4405,223,939
Events in quadrant C13,318,5725,620,363
Events in quadrant D21,238,2015,242,762

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0950
B0950
C0950
D0950

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013420
B013420
C013420
D013420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02407580
B01752440
C01355500
D01627220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A659021199418.199751%
B6590234965.304847%
C659024460.676762%
D6590216172.453643%

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 75353 65874 654 654 0.87% 0.99%
B 75353 65903 96 96 0.13% 0.15%
C 75353 65905 1 1 0.00% 0.00%
D 75353 65907 210 210 0.28% 0.32%

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 19210884 29403.02 3010 2955 653.3
A 14 238 1208897 1846.03 3010 2955 653.3
A 15 223 535041 814.5 3010 2955 653.3
B 4 239 4929817 7906.54 3279 3185 623.1
B 3 64 2533887 4061.42 3279 3185 623.1
B 11 51 763255 1219.8 3279 3185 623.1
C 7 87 126589 158.69 3349 3281 777.0
C 0 207 48775 58.55 3349 3281 777.0
C 12 4 29873 34.22 3349 3281 777.0
D 1 52 2988376 3858.34 3324 3200 773.7
D 2 120 1064518 1371.75 3324 3200 773.7
D 8 195 766642 986.75 3324 3200 773.7

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