ASTROSAT CZTI

Data Quality Report

Orbit 56574

Creation date: 2026-03-13T20:27:25.046165
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_083T06_9000006558_56574cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56574cztM0_level2_quad_clean.evt
Size (bytes)1,170,406,080258,768,000
Size1.1 GB 246.8 MB
Events in quadrant A10,111,5841,684,739
Events in quadrant B8,826,9131,828,175
Events in quadrant C8,897,2631,624,709
Events in quadrant D14,051,1681,418,670

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430824
B0394377
C0404828
D0544424

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A185536763.643616%
B185524842.608883%
C185523922.112980%
D1855416318.790557%

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 19823 18555 236 236 1.19% 1.27%
B 19824 18556 40 40 0.20% 0.22%
C 19824 18557 90 90 0.45% 0.48%
D 19824 18558 1261 1261 6.36% 6.79%

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 8 780298 1585.29 2001 1946 491.0
A 7 64 259525 524.62 2001 1946 491.0
A 4 95 240444 485.75 2001 1946 491.0
B 0 173 156559 368.08 1981 1908 420.2
B 4 171 134753 316.18 1981 1908 420.2
B 4 206 123652 289.76 1981 1908 420.2
C 6 223 384488 724.62 1949 1921 528.0
C 12 249 291683 548.84 1949 1921 528.0
C 12 252 180903 339.01 1949 1921 528.0
D 2 249 2685519 4974.66 1891 1802 539.5
D 6 239 1753910 3247.78 1891 1802 539.5
D 3 12 414782 765.52 1891 1802 539.5

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