ASTROSAT CZTI

Data Quality Report

Orbit 20201123_A10_048T01_9000004028_level2

Creation date: 2021-01-07T07:56:46.248340
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_048T01_9000004028cztM0_level2_bc.evt modeM0/AS1A10_048T01_9000004028cztM0_level2_quad_clean.evt
Size (bytes)2,570,875,200915,851,520
Size2.4 GB 873.4 MB
Events in quadrant A15,480,4796,042,311
Events in quadrant B15,242,7696,065,653
Events in quadrant C15,014,7975,675,611
Events in quadrant D27,498,3345,305,570

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01446670
B01448370
C01447150
D02070060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0940
B0940
C0940
D0940

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013780
B013780
C013780
D013780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A678186620.976142%
B678188371.234186%
C6781810751.585125%
D6781866799.848418%

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 86777 67813 5 5 0.01% 0.01%
B 86777 67811 5 5 0.01% 0.01%
C 86777 67813 7 7 0.01% 0.01%
D 86777 67806 505 505 0.58% 0.74%

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 6 16 989206 1215.78 3717 3657 810.6
A 13 254 107117 127.63 3717 3657 810.6
A 4 2 56131 64.73 3717 3657 810.6
B 0 230 467093 657.66 3732 3643 704.7
B 10 245 233501 326.18 3732 3643 704.7
B 0 190 82475 111.87 3732 3643 704.7
C 3 233 1061636 1287.73 3499 3488 821.7
C 2 16 364415 439.24 3499 3488 821.7
C 6 112 71124 82.31 3499 3488 821.7
D 1 52 7665847 9554.87 3447 3334 801.9
D 13 104 2631245 3276.91 3447 3334 801.9
D 7 238 1898295 2362.95 3447 3334 801.9

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