ASTROSAT CZTI

Data Quality Report

Orbit 20200807_A09_044T01_9000003792_level2

Creation date: 2021-01-09T09:25:53.352090
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_044T01_9000003792cztM0_level2_bc.evt modeM0/AS1A09_044T01_9000003792cztM0_level2_quad_clean.evt
Size (bytes)1,751,374,080520,223,040
Size1.6 GB 496.1 MB
Events in quadrant A9,967,5063,323,418
Events in quadrant B8,701,2493,431,088
Events in quadrant C10,208,7623,311,033
Events in quadrant D21,439,3562,948,913

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0875170
B0830320
C0906800
D01352610

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08120
B08120
C08120
D08120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0570
B0570
C0570
D0570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A399237451.866092%
B399225961.492911%
C3992316194.055306%
D39923566714.194825%

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 45609 39924 25 25 0.05% 0.06%
B 45609 39924 1 1 0.00% 0.00%
C 45609 39924 19 19 0.04% 0.05%
D 45609 39923 1069 1069 2.34% 2.68%

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 1531345 3267.3 2178 2139 468.0
A 13 254 65555 135.49 2178 2139 468.0
A 8 192 14905 27.27 2178 2139 468.0
B 0 230 111069 261.65 2230 2180 416.2
B 8 61 14444 29.47 2230 2180 416.2
B 3 64 11893 23.34 2230 2180 416.2
C 4 254 1744242 3487.5 2123 2117 499.5
C 3 233 242743 481.7 2123 2117 499.5
C 2 16 27819 51.45 2123 2117 499.5
D 1 52 11555857 25006.9 2009 1955 462.0
D 12 233 1455768 3146.59 2009 1955 462.0
D 13 168 192482 412.37 2009 1955 462.0

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