ASTROSAT CZTI

Data Quality Report

Orbit 20211119_A10_067T01_9000004774_level2

Creation date: 2021-11-24T10:26:31.695902
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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_067T01_9000004774cztM0_level2_bc.evt modeM0/AS1A10_067T01_9000004774cztM0_level2_quad_clean.evt
Size (bytes)1,149,197,760168,851,520
Size1.1 GB 161.0 MB
Events in quadrant A11,599,281807,350
Events in quadrant B4,228,8071,189,521
Events in quadrant C3,439,9501,183,664
Events in quadrant D14,584,340971,617

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02840
B02840
C02840
D02840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0914500
B0345240
C0302940
D0729310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13854981070.809874%
B138545463.941100%
C138541701.227082%
D13854372726.901978%

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 16480 13852 13 13 0.08% 0.09%
B 16480 13854 12 12 0.07% 0.09%
C 16480 13854 34 34 0.21% 0.25%
D 16479 13852 649 649 3.94% 4.69%

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 15 169 9870609 98111.47 439 434 100.6
A 13 6 20886 203.3 439 434 100.6
A 13 254 14646 141.27 439 434 100.6
B 5 172 882516 6368.5 685 671 138.5
B 4 170 194196 1397.6 685 671 138.5
B 5 200 112627 808.52 685 671 138.5
C 1 23 273892 1772.17 675 671 154.2
C 10 49 146609 946.59 675 671 154.2
C 0 10 144267 931.4 675 671 154.2
D 8 195 5130571 33625.09 607 586 152.6
D 12 3 4329278 28372.92 607 586 152.6
D 2 250 544100 3562.53 607 586 152.6

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