ASTROSAT CZTI

Data Quality Report

Orbit 55978

Creation date: 2026-02-06T07:17:42.849190
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/AS1A14_066T02_9000006546_55978cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55978cztM0_level2_quad_clean.evt
Size (bytes)1,290,608,640255,248,640
Size1.2 GB 243.4 MB
Events in quadrant A14,045,7131,609,116
Events in quadrant B8,973,2861,802,793
Events in quadrant C9,230,5521,598,329
Events in quadrant D14,080,2641,431,598

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0547784
B0402204
C0419244
D0549404

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03800
B03800
C03800
D03800

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1866014187.599143%
B186604272.288317%
C186614872.609721%
D1866113207.073576%

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 20000 18663 957 957 4.79% 5.13%
B 20000 18663 35 35 0.17% 0.19%
C 20001 18666 276 276 1.38% 1.48%
D 20001 18665 1042 1042 5.21% 5.58%

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 4 249 3140176 6596.94 1935 1885 475.7
A 7 64 1380708 2898.4 1935 1885 475.7
A 0 8 1132892 2377.47 1935 1885 475.7
B 2 249 436646 1048.97 1952 1878 414.5
B 0 199 318074 762.89 1952 1878 414.5
B 0 213 196509 469.59 1952 1878 414.5
C 9 38 462622 883.96 1912 1895 521.2
C 13 3 379850 725.15 1912 1895 521.2
C 2 12 326444 622.68 1912 1895 521.2
D 11 129 2224622 4171.54 1886 1800 532.9
D 2 249 1347684 2525.8 1886 1800 532.9
D 6 42 865223 1620.37 1886 1800 532.9

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