ASTROSAT CZTI

Data Quality Report

Orbit 20200821_A09_038T06_9000003832_level2

Creation date: 2021-01-09T04:04:51.282867
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_038T06_9000003832cztM0_level2_bc.evt modeM0/AS1A09_038T06_9000003832cztM0_level2_quad_clean.evt
Size (bytes)1,269,457,920498,660,480
Size1.2 GB 475.6 MB
Events in quadrant A6,355,7793,556,349
Events in quadrant B6,077,7443,637,350
Events in quadrant C5,744,2033,442,627
Events in quadrant D18,613,9562,808,904

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05000
B05020
C05020
D04940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0537200
B0531180
C0525200
D01025970

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560
B0560
C0550
D0560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A241231820.754467%
B242422871.183896%
C242213651.506957%
D23660582224.606932%

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 23853 20225 1 1 0.00% 0.00%
B 23853 20240 8 8 0.03% 0.04%
C 23853 20250 3 3 0.01% 0.01%
D 23853 19756 1803 1803 7.56% 9.13%

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 0 13 428029 1391.33 1426 1410 306.6
A 13 170 423709 1377.24 1426 1410 306.6
A 13 254 39054 122.77 1426 1410 306.6
B 0 189 242417 901.45 1447 1426 267.3
B 0 190 58967 215.24 1447 1426 267.3
B 3 112 35306 126.73 1447 1426 267.3
C 3 233 324161 1001.95 1365 1371 322.2
C 4 254 82888 253.03 1365 1371 322.2
C 2 16 57276 173.53 1365 1371 322.2
D 1 52 7143597 25924.45 1168 1146 275.5
D 7 80 5758084 20895.55 1168 1146 275.5
D 12 233 710245 2573.77 1168 1146 275.5

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