ASTROSAT CZTI

Data Quality Report

Orbit 56118

Creation date: 2026-02-11T03:15:25.527170
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_083T03_9000006548_56118cztM0_level2.fits modeM0/AS1A14_083T03_9000006548_56118cztM0_level2_quad_clean.evt
Size (bytes)606,346,560102,683,520
Size578.3 MB 97.9 MB
Events in quadrant A8,548,939566,821
Events in quadrant B4,127,924751,190
Events in quadrant C3,683,258671,876
Events in quadrant D5,501,993596,987

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0305013
B0175322
C0165602
D0215852

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7510161721.531292%
B75111612.143523%
C7511510.679004%
D75114666.204234%

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 7680 7512 1357 1357 17.67% 18.06%
B 7681 7514 44 44 0.57% 0.59%
C 7681 7514 31 31 0.40% 0.41%
D 7681 7514 407 407 5.30% 5.42%

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 12 115 3193542 17705.27 726 706 180.3
A 15 32 1119182 6202.3 726 706 180.3
A 7 64 1105362 6125.66 726 706 180.3
B 4 171 185678 1093.29 794 766 169.1
B 10 247 167408 985.27 794 766 169.1
B 9 254 116737 685.68 794 766 169.1
C 12 254 349747 1644.67 768 759 212.2
C 12 252 92299 431.4 768 759 212.2
C 9 38 62797 292.37 768 759 212.2
D 8 240 1503831 7151.86 747 711 210.2
D 2 249 465308 2210.56 747 711 210.2
D 3 12 141939 671.96 747 711 210.2

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