ASTROSAT CZTI

Data Quality Report

Orbit 35816

Creation date: 2022-05-19T13:30:33.227259
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/AS1A09_146T01_9000005142_35816cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35816cztM0_level2_quad_clean.evt
Size (bytes)490,648,32070,084,800
Size467.9 MB 66.8 MB
Events in quadrant A3,642,310441,527
Events in quadrant B3,412,715441,709
Events in quadrant C3,009,984431,717
Events in quadrant D4,417,395418,304

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145263
B0138372
C0123822
D0169622

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A55511612.900378%
B55511592.864349%
C55511462.630157%
D55514478.052603%

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 7044 5552 152 152 2.16% 2.74%
B 7044 5552 96 96 1.36% 1.73%
C 7044 5552 129 129 1.83% 2.32%
D 7044 5552 442 442 6.27% 7.96%

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 15 169 1046249 8340.99 622 609 125.4
A 10 83 159289 1265.78 622 609 125.4
A 13 6 12874 97.84 622 609 125.4
B 5 255 388219 3256.91 622 605 119.0
B 0 213 227271 1904.55 622 605 119.0
B 5 172 226385 1897.11 622 605 119.0
C 0 10 352764 2491.71 608 610 141.3
C 15 214 229220 1617.56 608 610 141.3
C 0 207 49252 344.17 608 610 141.3
D 2 250 998973 6873.89 596 579 145.2
D 7 80 196868 1351.44 596 579 145.2
D 7 223 191324 1313.27 596 579 145.2

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