ASTROSAT CZTI

Data Quality Report

Orbit 56844

Creation date: 2026-03-31T23:52:20.794351
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_56844cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56844cztM0_level2_quad_clean.evt
Size (bytes)431,674,560100,572,480
Size411.7 MB 95.9 MB
Events in quadrant A3,306,377657,155
Events in quadrant B3,659,109700,831
Events in quadrant C3,330,851634,470
Events in quadrant D5,142,206568,736

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151291
B0158581
C0150401
D0202461

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69461151.655629%
B69461512.173913%
C6946110.158365%
D69474947.110983%

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 7481 6947 64 64 0.86% 0.92%
B 7481 6947 75 75 1.00% 1.08%
C 7481 6947 8 8 0.11% 0.12%
D 7482 6948 412 412 5.51% 5.93%

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 3 62 212624 1157.43 742 724 183.1
A 10 251 95309 516.64 742 724 183.1
A 4 13 56874 306.7 742 724 183.1
B 0 173 205025 1319.79 724 699 154.8
B 5 185 171368 1102.39 724 699 154.8
B 10 16 120455 773.53 724 699 154.8
C 1 16 252740 1286.44 717 710 195.9
C 13 3 86893 439.9 717 710 195.9
C 14 96 52254 263.09 717 710 195.9
D 8 240 1158752 5809.92 700 667 199.3
D 2 249 885055 4436.83 700 667 199.3
D 11 129 122408 610.75 700 667 199.3

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