ASTROSAT CZTI

Data Quality Report

Orbit 20210530_A10_094T78_9000004420_level2

Creation date: 2025-12-26T04:55:02.560013
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/AS1A10_094T78_9000004420cztM0_level2.fits modeM0/AS1A10_094T78_9000004420cztM0_level2_quad_clean.evt
Size (bytes)200,122,560275,719,680
Size190.9 MB 262.9 MB
Events in quadrant A1,265,5881,923,828
Events in quadrant B1,181,9241,865,958
Events in quadrant C1,204,8701,786,298
Events in quadrant D970,9121,339,088

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04260
B04260
C04260
D04260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0445120
B0635650
C0477490
D01041400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A208393831.837900%
B208396232.989587%
C208395402.591295%
D20839458321.992418%

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 23154 20837 0 0 0.00% 0.00%
B 23154 20837 0 0 0.00% 0.00%
C 23153 20837 0 0 0.00% 0.00%
D 23154 20827 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 1034 8.8 330 313 82.0
A 9 19 965 7.96 330 313 82.0
A 7 110 955 7.83 330 313 82.0
B 2 9 973 10.65 312 299 63.3
B 2 8 833 8.44 312 299 63.3
B 14 254 794 7.82 312 299 63.3
C 12 241 876 7.07 319 301 81.3
C 3 158 853 6.79 319 301 81.3
C 3 187 824 6.43 319 301 81.3
D 15 46 783 7.07 277 252 75.0
D 1 3 688 5.81 277 252 75.0
D 10 189 677 5.66 277 252 75.0

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