ASTROSAT CZTI

Data Quality Report

Orbit 55585

Creation date: 2026-01-06T06:51:55.975500
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_021T06_9000006538_55585cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55585cztM0_level2_quad_clean.evt
Size (bytes)584,472,960126,250,560
Size557.4 MB 120.4 MB
Events in quadrant A4,456,252831,443
Events in quadrant B4,587,125885,223
Events in quadrant C6,111,567738,927
Events in quadrant D5,771,650733,530

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201281
B0206933
C0253413
D0238890

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9125870.953425%
B91241111.216572%
C91246657.288470%
D91263273.583169%

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 9125 9125 51 51 0.56% 0.56%
B 9126 9125 7 7 0.08% 0.08%
C 9126 9125 613 613 6.72% 6.72%
D 9126 9126 255 255 2.79% 2.79%

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 394737 1714.52 921 894 229.7
A 8 249 324858 1410.32 921 894 229.7
A 4 3 64275 275.92 921 894 229.7
B 5 236 753622 3865.22 915 884 194.7
B 0 199 66967 339.33 915 884 194.7
B 4 169 50986 257.27 915 884 194.7
C 13 3 1627569 6809.13 879 871 238.9
C 12 2 408260 1705.27 879 871 238.9
C 9 237 351109 1466.05 879 871 238.9
D 11 129 821143 3271.02 890 851 250.8
D 2 249 264778 1052.44 890 851 250.8
D 15 125 216525 860.03 890 851 250.8

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