ASTROSAT CZTI

Data Quality Report

Orbit 20200821_A09_038T05_9000003830_level2

Creation date: 2021-01-09T04:11:48.099233
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_038T05_9000003830cztM0_level2_bc.evt modeM0/AS1A09_038T05_9000003830cztM0_level2_quad_clean.evt
Size (bytes)316,296,000143,654,400
Size301.6 MB 137.0 MB
Events in quadrant A1,590,1581,018,914
Events in quadrant B1,645,4571,034,148
Events in quadrant C1,958,625958,942
Events in quadrant D3,933,814884,428

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140830
B0142650
C0160580
D0238110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65131231.888531%
B65131442.210963%
C65133545.435283%
D651392814.248426%

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 7792 6511 0 0 0.00% 0.00%
B 7792 6511 1 1 0.01% 0.02%
C 7792 6511 18 18 0.23% 0.28%
D 7792 6511 142 142 1.82% 2.18%

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 13 254 9558 103.92 412 408 88.0
A 0 226 2664 25.62 412 408 88.0
A 12 194 2559 24.43 412 408 88.0
B 0 229 15328 193.45 414 407 77.1
B 0 190 12651 158.74 414 407 77.1
B 3 209 8641 106.75 414 407 77.1
C 4 254 434877 4782.41 384 385 90.9
C 3 233 40607 442.72 384 385 90.9
C 8 222 3707 36.56 384 385 90.9
D 1 52 1556843 18094.68 367 357 86.0
D 7 80 540841 6283.31 367 357 86.0
D 11 176 329024 3820.87 367 357 86.0

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