ASTROSAT CZTI

Data Quality Report

Orbit 20200725_A09_018T01_9000003774_level2

Creation date: 2021-01-09T19:28:40.903151
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/AS1A09_018T01_9000003774cztM0_level2_bc.evt modeM0/AS1A09_018T01_9000003774cztM0_level2_quad_clean.evt
Size (bytes)4,362,079,6801,459,445,760
Size4.1 GB 1.4 GB
Events in quadrant A25,360,1369,411,924
Events in quadrant B26,392,5799,542,318
Events in quadrant C26,975,1178,942,838
Events in quadrant D45,656,8148,535,018

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02385080
B02427490
C02498860
D03095020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01980
B01980
C01980
D01980

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023180
B023180
C023180
D023180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11340111941.052901%
B11340114821.306867%
C11340126432.330667%
D11340157125.036993%

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 133593 113391 39 39 0.03% 0.03%
B 133593 113382 1 1 0.00% 0.00%
C 133593 113389 51 51 0.04% 0.04%
D 133593 113389 1519 1519 1.14% 1.34%

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 13 254 165980 114.35 6534 6430 1395.2
A 0 13 153453 105.37 6534 6430 1395.2
A 0 226 41369 25.04 6534 6430 1395.2
B 0 190 269638 215.15 6601 6465 1223.2
B 3 64 203081 160.74 6601 6465 1223.2
B 5 172 151827 118.84 6601 6465 1223.2
C 2 16 1912714 1343.66 6167 6162 1418.9
C 3 233 1061874 744.02 6167 6162 1418.9
C 13 250 155636 105.34 6167 6162 1418.9
D 1 52 15346317 10989.5 6153 6005 1395.9
D 7 80 2255273 1611.33 6153 6005 1395.9
D 12 233 2167531 1548.47 6153 6005 1395.9

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