ASTROSAT CZTI

Data Quality Report

Orbit 57678

Creation date: 2026-05-27T02:52:12.415914
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_125T09_9000006578_57678cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57678cztM0_level2_quad_clean.evt
Size (bytes)1,237,818,240266,218,560
Size1.2 GB 253.9 MB
Events in quadrant A8,014,7721,780,115
Events in quadrant B10,181,4331,867,606
Events in quadrant C16,470,9001,532,722
Events in quadrant D9,693,4831,580,508

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0383233
B0437604
C0620903
D0423723

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A188531040.551636%
B188535472.901395%
C1885316148.560972%
D188532101.113881%

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 20213 18855 10 10 0.05% 0.05%
B 20213 18855 184 184 0.91% 0.98%
C 20213 18854 1457 1457 7.21% 7.73%
D 20213 18854 190 190 0.94% 1.01%

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 3 245 35991 67.47 2041 1988 504.0
A 10 251 30349 56.27 2041 1988 504.0
A 3 137 25412 46.48 2041 1988 504.0
B 5 185 988654 2308.24 1993 1915 427.5
B 10 16 402782 937.73 1993 1915 427.5
B 4 80 393355 915.68 1993 1915 427.5
C 15 224 3825659 7459.94 1901 1880 512.6
C 12 254 1908641 3719.96 1901 1880 512.6
C 12 252 1740488 3391.91 1901 1880 512.6
D 8 240 566734 1026.45 1961 1874 550.3
D 3 12 353635 639.21 1961 1874 550.3
D 2 120 311346 562.37 1961 1874 550.3

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