ASTROSAT CZTI

Data Quality Report

Orbit 54940

Creation date: 2025-11-23T20:50:24.380643
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_014T01_9000006528_54940cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54940cztM0_level2_quad_clean.evt
Size (bytes)567,930,24098,326,080
Size541.6 MB 93.8 MB
Events in quadrant A4,950,385622,598
Events in quadrant B3,388,645715,400
Events in quadrant C5,768,280581,811
Events in quadrant D6,357,466557,012

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198103
B0151722
C0222232
D02384716

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A718672010.019482%
B71862243.117172%
C718686312.009463%
D718372610.107198%

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 7787 7187 493 493 6.33% 6.86%
B 7786 7186 15 15 0.19% 0.21%
C 7786 7186 656 656 8.43% 9.13%
D 7786 7185 607 607 7.80% 8.45%

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 45 1314154 6956.36 767 746 188.8
A 15 32 423095 2236.94 767 746 188.8
A 0 8 110925 583.55 767 746 188.8
B 7 0 166002 969.54 782 752 170.4
B 10 247 61710 357.65 782 752 170.4
B 12 111 20762 117.4 782 752 170.4
C 12 252 2045682 10063.29 738 731 203.2
C 4 5 381294 1872.77 738 731 203.2
C 14 254 149237 730.8 738 731 203.2
D 2 249 836990 3968.04 755 723 210.8
D 11 176 499974 2368.92 755 723 210.8
D 12 191 449953 2131.57 755 723 210.8

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