ASTROSAT CZTI

Data Quality Report

Orbit 20180521_G08_078T01_9000002110_level2

Creation date: 2025-11-22T11:18:08.469722
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/AS1G08_078T01_9000002110cztM0_level2.fits modeM0/AS1G08_078T01_9000002110cztM0_level2_quad_clean.evt
Size (bytes)1,928,030,4001,650,726,720
Size1.8 GB 1.5 GB
Events in quadrant A11,914,4009,637,750
Events in quadrant B11,164,4409,214,273
Events in quadrant C11,551,1069,063,803
Events in quadrant D10,018,8268,338,512

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040920
B040920
C040920
D040920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04260150
B04866710
C04249950
D05251800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03210
B03210
C03210
D03220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20052821751.084637%
B200530102815.126914%
C20052816060.800886%
D20052968733.427434%

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 243858 200512 0 0 0.00% 0.00%
B 243858 200448 0 0 0.00% 0.00%
C 243858 200520 0 0 0.00% 0.00%
D 243858 200430 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 11541 11.22 3100 2897 770.1
A 7 110 9452 8.51 3100 2897 770.1
A 0 30 8906 7.8 3100 2897 770.1
B 2 9 9738 12.0 2942 2802 577.9
B 3 17 7336 7.84 2942 2802 577.9
B 5 128 7255 7.7 2942 2802 577.9
C 12 241 8219 6.82 3053 2834 789.3
C 2 191 7733 6.21 3053 2834 789.3
C 3 126 7701 6.17 3053 2834 789.3
D 6 231 7343 6.24 2857 2603 759.1
D 3 14 7219 6.08 2857 2603 759.1
D 7 3 7080 5.9 2857 2603 759.1

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