ASTROSAT CZTI

Data Quality Report

Orbit 20200827_A09_095T02_9000003846_level2

Creation date: 2021-01-09T01:05:53.001029
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_095T02_9000003846cztM0_level2_bc.evt modeM0/AS1A09_095T02_9000003846cztM0_level2_quad_clean.evt
Size (bytes)12,242,306,8803,235,345,920
Size11.4 GB 3.0 GB
Events in quadrant A47,364,62922,367,989
Events in quadrant B72,201,51422,339,952
Events in quadrant C60,088,26221,446,946
Events in quadrant D177,305,91517,911,528

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03510
B03510
C03510
D03510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04310570
B05234400
C04947540
D09387760

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041380
B041380
C041380
D041380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20317120701.018846%
B20317178193.848482%
C20317180393.956765%
D2031716048329.769505%

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 238230 203144 74 74 0.03% 0.04%
B 238230 203149 544 544 0.23% 0.27%
C 238230 203147 134 134 0.06% 0.07%
D 238230 203082 18559 18559 7.79% 9.14%

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 1729800 705.18 11387 11254 2437.0
A 12 96 808186 327.01 11387 11254 2437.0
A 5 168 465564 186.42 11387 11254 2437.0
B 3 64 14615145 6928.0 11290 11073 2108.0
B 0 189 10448090 4951.2 11290 11073 2108.0
B 3 112 1406189 661.83 11290 11073 2108.0
C 4 254 9214349 3589.39 10824 10834 2564.1
C 3 233 6299199 2452.48 10824 10834 2564.1
C 15 208 2292616 889.9 10824 10834 2564.1
D 1 52 69521867 29171.08 9428 9195 2382.9
D 7 80 60624572 25437.32 9428 9195 2382.9
D 2 250 6552701 2745.99 9428 9195 2382.9

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