ASTROSAT CZTI

Data Quality Report

Orbit 20211209_A11_037T01_9000004806_level2

Creation date: 2021-12-13T17:24:52.459775
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_037T01_9000004806cztM0_level2_bc.evt modeM0/AS1A11_037T01_9000004806cztM0_level2_quad_clean.evt
Size (bytes)1,048,757,760308,888,640
Size1000.2 MB 294.6 MB
Events in quadrant A3,756,3032,072,386
Events in quadrant B7,082,8342,089,298
Events in quadrant C6,539,0142,066,980
Events in quadrant D13,140,3161,871,094

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0367080
B0496410
C0448450
D0716950

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03720
B03720
C03720
D03720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18214190.104315%
B182148514.672230%
C182144072.234545%
D18214242513.313934%

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 34826 18216 1 1 0.00% 0.01%
B 34825 18214 17 17 0.05% 0.09%
C 34825 18213 46 46 0.13% 0.25%
D 34825 18214 122 122 0.35% 0.67%

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 34116 158.49 949 934 209.4
A 12 227 28283 130.63 949 934 209.4
A 13 6 17965 81.35 949 934 209.4
B 5 172 1381314 7304.43 955 937 189.0
B 5 255 750950 3968.78 955 937 189.0
B 4 170 343053 1810.35 955 937 189.0
C 15 214 814923 3776.85 942 937 215.5
C 1 23 612542 2837.81 942 937 215.5
C 0 10 518486 2401.4 942 937 215.5
D 8 195 4745923 20876.13 887 869 227.3
D 2 250 1485877 6533.37 887 869 227.3
D 2 120 1436878 6317.8 887 869 227.3

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