ASTROSAT CZTI

Data Quality Report

Orbit 20171104_A04_022T02_9000001662_level2

Creation date: 2025-11-18T04:14:53.398359
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/AS1A04_022T02_9000001662cztM0_level2.fits modeM0/AS1A04_022T02_9000001662cztM0_level2_quad_clean.evt
Size (bytes)515,462,400458,703,360
Size491.6 MB 437.5 MB
Events in quadrant A3,126,2082,598,107
Events in quadrant B2,964,9402,525,836
Events in quadrant C3,157,7862,764,157
Events in quadrant D2,625,1242,268,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011060
B011060
C011060
D011060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01330080
B01417050
C01128140
D01571990

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5443017323.182069%
B5443029905.493294%
C544304370.802866%
D5443039557.266213%

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 63866 54413 0 0 0.00% 0.00%
B 63866 54414 0 0 0.00% 0.00%
C 63866 54430 0 0 0.00% 0.00%
D 63866 54269 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 2978 10.95 812 760 202.6
A 7 110 2527 8.72 812 760 202.6
A 9 19 2314 7.67 812 760 202.6
B 2 9 2562 11.81 781 746 153.8
B 2 8 1956 7.87 781 746 153.8
B 3 17 1922 7.65 781 746 153.8
C 1 81 2394 7.44 832 779 217.1
C 12 250 2341 7.19 832 779 217.1
C 1 80 2340 7.19 832 779 217.1
D 6 231 1896 6.06 748 679 200.7
D 3 14 1877 5.97 748 679 200.7
D 7 5 1870 5.93 748 679 200.7

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