ASTROSAT CZTI

Data Quality Report

Orbit 51271

Creation date: 2025-03-24T08:13:12.596892
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/AS1C07_001T01_9000006454_51271cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51271cztM0_level2_quad_clean.evt
Size (bytes)2,130,442,560227,482,560
Size2.0 GB 216.9 MB
Events in quadrant A16,573,4891,550,608
Events in quadrant B10,721,3621,821,166
Events in quadrant C30,039,814971,183
Events in quadrant D20,081,5291,251,158

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0623232
B0452312
C01021986
D0726472

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1875816008.529694%
B187586853.651775%
C18757793042.277550%
D18758364019.405054%

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 19733 18760 1093 1093 5.54% 5.83%
B 19733 18759 325 325 1.65% 1.73%
C 19732 18757 7694 7694 38.99% 41.02%
D 19733 18760 3442 3442 17.44% 18.35%

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 12 3 3478099 7331.1 1920 1870 474.2
A 12 250 3087221 6506.77 1920 1870 474.2
A 4 249 473384 994.39 1920 1870 474.2
B 5 185 1355994 3241.23 1951 1880 417.8
B 10 247 320397 762.41 1951 1880 417.8
B 8 234 279615 664.79 1951 1880 417.8
C 4 12 14477212 34867.09 1477 1463 415.2
C 10 171 7582999 18261.31 1477 1463 415.2
C 4 13 665687 1599.89 1477 1463 415.2
D 7 60 4702665 9692.66 1753 1693 485.0
D 11 245 1764097 3633.8 1753 1693 485.0
D 7 126 1247912 2569.51 1753 1693 485.0

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