ASTROSAT CZTI

Data Quality Report

Orbit 20220415_T05_022T01_9000005070_level2

Creation date: 2026-01-02T10:36:36.622015
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/AS1T05_022T01_9000005070cztM0_level2.fits modeM0/AS1T05_022T01_9000005070cztM0_level2_quad_clean.evt
Size (bytes)677,027,520650,715,840
Size645.7 MB 620.6 MB
Events in quadrant A4,386,8084,203,190
Events in quadrant B3,253,0583,097,863
Events in quadrant C4,270,9123,959,741
Events in quadrant D3,414,4763,285,180

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550630
B03891670
C01761250
D02573410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015400
B015400
C015400
D015400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02870
B02870
C02870
D02870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A752421080.143537%
B752423116941.425002%
C7524215592.071981%
D75242988613.138938%

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 103977 75242 0 0 0.00% 0.00%
B 103977 74907 0 0 0.00% 0.00%
C 103977 75208 0 0 0.00% 0.00%
D 103977 74255 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 9 19 3567 8.93 1142 1073 279.2
A 0 29 3534 8.82 1142 1073 279.2
A 7 110 3532 8.81 1142 1073 279.2
B 2 9 2793 11.95 860 823 164.9
B 3 80 2523 10.31 860 823 164.9
B 2 8 2300 8.96 860 823 164.9
C 1 81 3631 8.97 1127 1057 286.9
C 1 80 3526 8.61 1127 1057 286.9
C 3 202 3365 8.04 1127 1057 286.9
D 3 14 2494 6.14 980 897 260.0
D 7 3 2472 6.06 980 897 260.0
D 10 189 2467 6.04 980 897 260.0

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