ASTROSAT CZTI

Data Quality Report

Orbit 20210921_A09_131T01_9000004702_level2

Creation date: 2021-09-25T18:52:45.172425
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_131T01_9000004702cztM0_level2_bc.evt modeM0/AS1A09_131T01_9000004702cztM0_level2_quad_clean.evt
Size (bytes)172,615,68054,964,800
Size164.6 MB 52.4 MB
Events in quadrant A627,413393,019
Events in quadrant B2,430,580336,402
Events in quadrant C893,639385,974
Events in quadrant D1,100,145371,147

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A054030
B0124580
C067050
D070880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0500
B0500
C0500
D0500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A247050.202429%
B247084834.331984%
C24701385.587045%
D2470823.319838%

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 2469 2469 0 0 0.00% 0.00%
B 2469 2468 8 8 0.32% 0.32%
C 2469 2469 6 6 0.24% 0.24%
D 2469 2469 0 0 0.00% 0.00%

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 6 7795 215.51 157 155 35.5
A 13 254 4717 128.69 157 155 35.5
A 0 6 4190 113.82 157 155 35.5
B 4 80 826598 29346.36 138 135 28.2
B 6 159 664429 23588.0 138 135 28.2
B 5 172 321125 11397.83 138 135 28.2
C 3 233 227872 5924.58 155 155 38.4
C 0 10 31955 827.35 155 155 38.4
C 4 175 16455 424.08 155 155 38.4
D 8 195 278009 7549.38 156 152 36.8
D 13 249 50708 1373.61 156 152 36.8
D 12 6 46005 1245.83 156 152 36.8

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