ASTROSAT CZTI

Data Quality Report

Orbit 20220131_A11_091T01_9000004894_level2

Creation date: 2022-02-02T09:51:19.801023
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A11_091T01_9000004894cztM0_level2_bc.evt modeM0/AS1A11_091T01_9000004894cztM0_level2_quad_clean.evt
Size (bytes)1,791,443,520358,168,320
Size1.7 GB 341.6 MB
Events in quadrant A6,229,0362,232,245
Events in quadrant B10,870,0082,241,763
Events in quadrant C8,084,7212,230,159
Events in quadrant D26,995,5122,047,627

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0616890
B0796460
C0654840
D01292520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0900
B0900
C0900
D0900

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06220
B06220
C06220
D06220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A30497390.127881%
B3049811233.682209%
C304962730.895199%
D30487519517.040050%

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 39457 30504 6 6 0.02% 0.02%
B 39457 30501 88 88 0.22% 0.29%
C 39457 30502 43 43 0.11% 0.14%
D 39457 30499 1995 1995 5.06% 6.54%

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 10 83 93553 269.12 1536 1507 342.0
A 13 6 64887 185.31 1536 1507 342.0
A 9 143 62062 177.05 1536 1507 342.0
B 5 172 2374494 7785.32 1529 1496 304.8
B 5 31 682536 2234.35 1529 1496 304.8
B 4 251 629293 2059.67 1529 1496 304.8
C 15 214 1217860 3579.95 1499 1486 339.8
C 14 254 495825 1454.91 1499 1486 339.8
C 0 10 238161 696.57 1499 1486 339.8
D 12 227 6415385 18231.44 1414 1366 351.8
D 8 195 3339006 9487.03 1414 1366 351.8
D 12 235 3054122 8677.27 1414 1366 351.8

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