ASTROSAT CZTI

Data Quality Report

Orbit 20220216_A05_115T02_9000004934_level2

Creation date: 2026-01-01T03:40:40.661025
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/AS1A05_115T02_9000004934cztM0_level2.fits modeM0/AS1A05_115T02_9000004934cztM0_level2_quad_clean.evt
Size (bytes)426,225,600455,086,080
Size406.5 MB 434.0 MB
Events in quadrant A2,662,7442,842,551
Events in quadrant B2,484,6102,771,933
Events in quadrant C2,598,9822,749,100
Events in quadrant D2,188,0002,444,851

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08840
B08840
C08840
D08840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0902300
B01051990
C0940730
D01398130

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01710
B01710
C01710
D01710

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A43322940.216980%
B4332212162.806888%
C433221910.440885%
D4332217313.995660%

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 58884 43321 0 0 0.00% 0.00%
B 58884 43291 0 0 0.00% 0.00%
C 58884 43320 0 0 0.00% 0.00%
D 58884 43291 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 7 110 2134 8.68 695 655 170.5
A 9 19 2114 8.56 695 655 170.5
A 0 29 2095 8.45 695 655 170.5
B 2 9 2148 11.61 660 632 130.6
B 3 80 1867 9.45 660 632 130.6
B 2 8 1697 8.15 660 632 130.6
C 1 81 2119 8.5 686 648 173.0
C 1 80 2098 8.38 686 648 173.0
C 3 203 2004 7.84 686 648 173.0
D 10 113 1628 6.4 627 575 164.6
D 10 189 1618 6.34 627 575 164.6
D 4 160 1615 6.32 627 575 164.6

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