ASTROSAT CZTI

Data Quality Report

Orbit 20200815_A09_127T01_9000003816_level2

Creation date: 2025-12-14T09:44:49.424015
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/AS1A09_127T01_9000003816cztM0_level2.fits modeM0/AS1A09_127T01_9000003816cztM0_level2_quad_clean.evt
Size (bytes)561,899,520423,509,760
Size535.9 MB 403.9 MB
Events in quadrant A3,509,7762,375,043
Events in quadrant B3,338,1522,351,034
Events in quadrant C3,296,7302,136,301
Events in quadrant D2,989,7502,080,412

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011460
B011460
C011460
D011460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01192940
B01349830
C01645650
D01288090

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A565875971.055013%
B5658719363.421281%
C5658746758.261615%
D5658710151.793698%

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 66372 56587 0 0 0.00% 0.00%
B 66372 56576 0 0 0.00% 0.00%
C 66372 56548 0 0 0.00% 0.00%
D 66372 56581 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 2863 8.93 914 860 224.3
A 7 110 2794 8.62 914 860 224.3
A 9 19 2581 7.67 914 860 224.3
B 2 9 2640 10.42 885 850 171.8
B 5 128 2229 8.03 885 850 171.8
B 2 8 2223 7.99 885 850 171.8
C 1 81 2687 8.5 870 818 220.0
C 1 80 2668 8.41 870 818 220.0
C 12 241 2416 7.26 870 818 220.0
D 15 46 2144 6.1 853 780 223.5
D 10 189 2143 6.1 853 780 223.5
D 6 67 2107 5.94 853 780 223.5

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