ASTROSAT CZTI

Data Quality Report

Orbit 20210118_A10_021T08_9000004118_level2

Creation date: 2021-01-19T09:54:36.080624
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/AS1A10_021T08_9000004118cztM0_level2_bc.evt modeM0/AS1A10_021T08_9000004118cztM0_level2_quad_clean.evt
Size (bytes)1,601,043,840479,289,600
Size1.5 GB 457.1 MB
Events in quadrant A9,032,9703,034,907
Events in quadrant B9,441,8633,089,468
Events in quadrant C8,590,7682,959,587
Events in quadrant D18,820,3102,812,438

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0830
B0830
C0830
D0830

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0812520
B0834410
C0818990
D01181550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07760
B07760
C07760
D07760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A381595221.367960%
B381596921.813465%
C381598932.340208%
D3815931118.152729%

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 46429 38153 5 5 0.01% 0.01%
B 46429 38153 21 21 0.05% 0.06%
C 46429 38155 0 0 0.00% 0.00%
D 46429 38153 1129 1129 2.43% 2.96%

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 14 254 167591 349.82 2250 2214 472.7
A 4 2 86561 178.42 2250 2214 472.7
A 13 254 66937 136.91 2250 2214 472.7
B 4 80 276442 667.67 2249 2203 410.7
B 10 245 237040 571.74 2249 2203 410.7
B 15 33 132530 317.3 2249 2203 410.7
C 3 233 118198 231.27 2163 2159 501.7
C 10 22 99770 194.54 2163 2159 501.7
C 14 254 56482 108.27 2163 2159 501.7
D 1 52 7034690 14938.58 2128 2072 470.8
D 8 195 1926932 4088.76 2128 2072 470.8
D 7 80 723864 1533.22 2128 2072 470.8

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