ASTROSAT CZTI

Data Quality Report

Orbit 20160108_G02_016T01_9000000258_level2

Creation date: 2025-10-28T16:42:10.856867
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/AS1G02_016T01_9000000258cztM0_level2.fits modeM0/AS1G02_016T01_9000000258cztM0_level2_quad_clean.evt
Size (bytes)540,858,240618,600,960
Size515.8 MB 589.9 MB
Events in quadrant A3,119,7543,740,932
Events in quadrant B3,115,5843,778,398
Events in quadrant C3,108,2603,606,143
Events in quadrant D2,649,7603,224,514

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02871580
B02804470
C02660700
D02912690

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013020
B013020
C013020
D013020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0860
C0860
D0860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A639348471.324804%
B639343000.469234%
C639342330.364438%
D6393424173.780461%

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 72581 63930 0 0 0.00% 0.00%
B 72581 63933 0 0 0.00% 0.00%
C 72581 63931 0 0 0.00% 0.00%
D 72580 63911 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 2925 11.29 806 750 192.7
A 7 110 2874 11.02 806 750 192.7
A 14 188 2872 11.01 806 750 192.7
B 2 9 2525 11.56 820 776 151.4
B 5 128 2065 8.52 820 776 151.4
B 14 254 2045 8.38 820 776 151.4
C 1 81 2135 6.82 819 757 201.9
C 12 241 2086 6.58 819 757 201.9
C 3 235 2080 6.55 819 757 201.9
D 11 82 1931 6.93 753 691 178.9
D 6 231 1897 6.74 753 691 178.9
D 6 44 1887 6.69 753 691 178.9

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