ASTROSAT CZTI

Data Quality Report

Orbit 56869

Creation date: 2026-04-02T15:15:50.954898
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/AS1A14_083T03_9000006562_56869cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56869cztM0_level2_quad_clean.evt
Size (bytes)459,371,52089,841,600
Size438.1 MB 85.7 MB
Events in quadrant A3,353,348607,325
Events in quadrant B4,393,872611,824
Events in quadrant C3,186,050584,016
Events in quadrant D5,597,981492,900

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140871
B0171961
C0136611
D0207491

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60841382.268245%
B60835589.173105%
C60831312.153543%
D608484513.888889%

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 7164 6084 44 44 0.61% 0.72%
B 7163 6083 378 378 5.28% 6.21%
C 7163 6083 48 48 0.67% 0.79%
D 7164 6084 815 815 11.38% 13.40%

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 7 64 311750 1872.0 677 660 166.2
A 3 14 162207 972.12 677 660 166.2
A 10 251 105300 629.68 677 660 166.2
B 5 185 1204489 8746.04 640 619 137.6
B 10 16 413032 2996.15 640 619 137.6
B 0 63 86684 625.26 640 619 137.6
C 1 16 279991 1559.72 656 651 179.1
C 13 3 97898 542.99 656 651 179.1
C 14 254 93172 516.6 656 651 179.1
D 2 249 1990385 11248.7 626 597 176.9
D 8 240 778897 4399.9 626 597 176.9
D 7 96 130974 737.05 626 597 176.9

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