ASTROSAT CZTI

Data Quality Report

Orbit 20200502_A08_003T06_9000003636_level2

Creation date: 2025-12-10T19:46:42.348190
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/AS1A08_003T06_9000003636cztM0_level2.fits modeM0/AS1A08_003T06_9000003636cztM0_level2_quad_clean.evt
Size (bytes)458,331,840301,466,880
Size437.1 MB 287.5 MB
Events in quadrant A2,898,2381,610,646
Events in quadrant B2,802,0181,644,666
Events in quadrant C2,726,1701,462,877
Events in quadrant D2,435,9281,390,166

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08940
B08940
C08940
D08940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980060
B0928240
C01137470
D01007840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0920
C0920
D0920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A439769362.128434%
B439765081.155176%
C4397616053.649718%
D439765891.339367%

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 53082 43974 0 0 0.00% 0.00%
B 53082 43977 0 0 0.00% 0.00%
C 53082 43971 0 0 0.00% 0.00%
D 53081 43968 0 0 0.00% 0.00%

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 29 2700 10.84 755 711 183.5
A 7 110 2286 8.58 755 711 183.5
A 9 19 2175 7.98 755 711 183.5
B 2 9 2206 10.27 740 709 145.7
B 5 255 1857 7.88 740 709 145.7
B 2 8 1851 7.84 740 709 145.7
C 1 81 2071 7.58 719 676 184.0
C 1 80 2057 7.5 719 676 184.0
C 9 209 1854 6.4 719 676 184.0
D 7 3 1790 6.22 695 634 185.8
D 6 231 1752 6.02 695 634 185.8
D 3 14 1733 5.92 695 634 185.8

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