ASTROSAT CZTI

Data Quality Report

Orbit 20200826_T03_220T01_9000003842_level2

Creation date: 2025-12-14T14:43:02.771488
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/AS1T03_220T01_9000003842cztM0_level2.fits modeM0/AS1T03_220T01_9000003842cztM0_level2_quad_clean.evt
Size (bytes)540,961,920443,669,760
Size515.9 MB 423.1 MB
Events in quadrant A3,498,9982,673,666
Events in quadrant B3,275,4102,658,791
Events in quadrant C3,264,8902,529,166
Events in quadrant D2,666,3301,901,747

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010920
B010920
C010920
D010920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01142840
B01266110
C01457660
D02172980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01050
D01050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A534966351.187005%
B5349615312.861896%
C5349645288.464184%
D534961124121.012786%

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 64056 53485 0 0 0.00% 0.00%
B 64056 53481 0 0 0.00% 0.00%
C 64056 53380 0 0 0.00% 0.00%
D 64056 53129 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 2945 9.43 911 863 220.9
A 7 110 2842 8.96 911 863 220.9
A 9 19 2675 8.2 911 863 220.9
B 2 9 2677 10.91 869 835 168.9
B 2 8 2220 8.2 869 835 168.9
B 5 128 2168 7.89 869 835 168.9
C 1 81 2628 8.31 862 813 218.4
C 1 80 2537 7.89 862 813 218.4
C 12 241 2303 6.82 862 813 218.4
D 10 189 1963 6.39 760 700 197.5
D 6 231 1935 6.25 760 700 197.5
D 3 14 1833 5.74 760 700 197.5

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