ASTROSAT CZTI

Data Quality Report

Orbit 20171221_A04_130T01_9000001792_level2

Creation date: 2025-11-19T05:56:34.334831
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_130T01_9000001792cztM0_level2.fits modeM0/AS1A04_130T01_9000001792cztM0_level2_quad_clean.evt
Size (bytes)390,879,360370,877,760
Size372.8 MB 353.7 MB
Events in quadrant A2,350,3622,198,331
Events in quadrant B2,223,6382,077,820
Events in quadrant C2,337,7382,124,198
Events in quadrant D1,991,6001,897,811

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0902410
B01135360
C0885720
D01085050

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08660
B08660
C08660
D08660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A427354521.057681%
B4273523825.573886%
C427351690.395460%
D4273515293.577864%

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 46690 42732 0 0 0.00% 0.00%
B 46690 42717 0 0 0.00% 0.00%
C 46690 42734 0 0 0.00% 0.00%
D 46690 42603 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 2235 10.75 611 570 154.9
A 7 110 1917 8.7 611 570 154.9
A 9 19 1785 7.84 611 570 154.9
B 2 9 1919 11.07 586 554 123.3
B 3 17 1589 8.39 586 554 123.3
B 14 254 1472 7.44 586 554 123.3
C 1 80 1776 7.45 617 570 162.0
C 1 81 1750 7.29 617 570 162.0
C 12 241 1709 7.03 617 570 162.0
D 3 14 1504 6.35 568 514 156.0
D 6 231 1496 6.3 568 514 156.0
D 7 3 1452 6.01 568 514 156.0

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