ASTROSAT CZTI

Data Quality Report

Orbit 20171108_A04_021T02_9000001676_level2

Creation date: 2025-11-18T06:53:41.920988
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/AS1A04_021T02_9000001676cztM0_level2.fits modeM0/AS1A04_021T02_9000001676cztM0_level2_quad_clean.evt
Size (bytes)577,281,600603,210,240
Size550.5 MB 575.3 MB
Events in quadrant A3,510,0023,598,813
Events in quadrant B3,289,2743,405,699
Events in quadrant C3,485,9623,757,323
Events in quadrant D2,979,8163,290,626

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012520
B012520
C012520
D012520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01338020
B01663570
C01262770
D01511990

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A614657971.296673%
B6146537176.047344%
C614654730.769544%
D6146520743.374278%

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 69900 61464 0 0 0.00% 0.00%
B 69900 61457 0 0 0.00% 0.00%
C 69900 61464 0 0 0.00% 0.00%
D 69900 61420 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 3366 10.89 915 854 230.7
A 7 110 2892 8.83 915 854 230.7
A 9 19 2655 7.81 915 854 230.7
B 2 9 2864 11.85 868 826 172.0
B 3 17 2285 8.48 868 826 172.0
B 14 254 2238 8.21 868 826 172.0
C 1 81 2603 7.32 917 851 239.5
C 1 80 2586 7.25 917 851 239.5
C 12 250 2582 7.23 917 851 239.5
D 6 231 2181 6.21 849 772 227.0
D 3 14 2160 6.11 849 772 227.0
D 4 160 2093 5.82 849 772 227.0

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