ASTROSAT CZTI

Data Quality Report

Orbit 59001

Creation date: 2026-08-24T03:14:15.041435
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_004T07_9000006598_59001cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_59001cztM0_level2_quad_clean.evt
Size (bytes)2,285,524,800211,795,200
Size2.1 GB 202.0 MB
Events in quadrant A15,800,4851,612,299
Events in quadrant B11,823,2781,752,503
Events in quadrant C14,687,6461,459,426
Events in quadrant D40,871,977321,556

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0592263
B0479863
C0571043
D01336603

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03700
D03700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1837517809.687075%
B1837612897.014584%
C18376241613.147584%
D183761505181.905747%

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 20039 18377 1571 1571 7.84% 8.55%
B 20041 18379 700 700 3.49% 3.81%
C 20041 18378 2148 2148 10.72% 11.69%
D 20041 18377 14812 14812 73.91% 80.60%

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 24 3687737 7727.3 1937 1886 477.0
A 14 238 2923787 6125.7 1937 1886 477.0
A 15 233 933201 1952.48 1937 1886 477.0
B 2 249 1536226 3716.35 1932 1857 412.9
B 4 236 904899 2187.23 1932 1857 412.9
B 6 255 628705 1518.27 1932 1857 412.9
C 15 219 6777471 13445.14 1838 1818 503.9
C 12 2 239714 472.06 1838 1818 503.9
C 1 243 107017 208.75 1838 1818 503.9
D 12 110 33613952 94915.06 1247 1190 354.1
D 8 160 1159984 3272.18 1247 1190 354.1
D 12 2 338106 951.38 1247 1190 354.1

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

TCT plots

Parameter TCT0 TCT_healed
Tct