ASTROSAT CZTI

Data Quality Report

Orbit 20878

Creation date: 2024-06-27T18:20:40.670901
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/AS1A06_002T03_9000003080_20878cztM0_level2.evt modeM0/AS1A06_002T03_9000003080_20878cztM0_level2_quad_clean.evt
Size (bytes)518,739,840102,291,840
Size494.7 MB 97.6 MB
Events in quadrant A3,374,936666,812
Events in quadrant B3,857,761663,000
Events in quadrant C3,411,556646,123
Events in quadrant D4,573,327616,786

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148041
B0160471
C0149031
D0183603

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7252330.455047%
B7253670.923756%
C7253660.909968%
D72522483.419746%

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 7642 7253 0 0 0.00% 0.00%
B 7643 7254 7 7 0.09% 0.10%
C 7643 7254 9 9 0.12% 0.12%
D 7642 7253 209 209 2.73% 2.88%

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 0 226 7469 37.04 877 859 178.5
A 3 137 6997 34.39 877 859 178.5
A 5 98 6481 31.5 877 859 178.5
B 0 189 145597 864.11 867 847 167.5
B 0 197 83478 493.28 867 847 167.5
B 7 220 57246 336.68 867 847 167.5
C 14 238 128585 656.28 827 833 194.7
C 9 54 37212 186.88 827 833 194.7
C 8 128 10570 50.02 827 833 194.7
D 1 52 646616 3198.65 831 809 201.9
D 1 20 263022 1298.73 831 809 201.9
D 1 239 230439 1137.35 831 809 201.9

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