ASTROSAT CZTI

Data Quality Report

Orbit 55975

Creation date: 2026-02-06T05:59:20.528648
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_55975cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55975cztM0_level2_quad_clean.evt
Size (bytes)567,092,160119,753,280
Size540.8 MB 114.2 MB
Events in quadrant A5,377,547766,633
Events in quadrant B4,190,390844,193
Events in quadrant C4,573,466750,778
Events in quadrant D6,188,786672,541

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218680
B0184710
C0200040
D0246430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A85203173.720657%
B85211071.255721%
C85211371.607793%
D85216507.628213%

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 8520 8520 277 277 3.25% 3.25%
B 8521 8521 12 12 0.14% 0.14%
C 8521 8521 95 95 1.11% 1.11%
D 8521 8521 546 546 6.41% 6.41%

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 7 64 911211 4037.03 916 890 225.5
A 12 115 324086 1433.29 916 890 225.5
A 0 8 262931 1162.08 916 890 225.5
B 7 0 164434 814.42 923 886 200.8
B 2 249 148755 736.35 923 886 200.8
B 0 199 67913 333.78 923 886 200.8
C 9 38 404422 1636.55 905 897 246.6
C 15 199 230447 930.97 905 897 246.6
C 13 3 167041 673.82 905 897 246.6
D 2 249 1592108 6474.91 877 841 245.8
D 11 129 590628 2399.86 877 841 245.8
D 7 96 202367 820.01 877 841 245.8

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