ASTROSAT CZTI

Data Quality Report

Orbit 55972

Creation date: 2026-02-06T04:34:49.911126
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_55972cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55972cztM0_level2_quad_clean.evt
Size (bytes)600,344,64097,577,280
Size572.5 MB 93.1 MB
Events in quadrant A10,236,788470,050
Events in quadrant B3,893,610718,729
Events in quadrant C3,988,167640,420
Events in quadrant D3,537,469617,355

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0354202
B0163622
C0173842
D0159702

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7297236132.355763%
B72971381.891188%
C72972012.754557%
D7297470.644100%

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 7902 7298 2091 2091 26.46% 28.65%
B 7902 7298 21 21 0.27% 0.29%
C 7902 7298 151 151 1.91% 2.07%
D 7902 7298 21 21 0.27% 0.29%

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 5684832 33456.96 681 666 169.9
A 15 32 1067798 6281.13 681 666 169.9
A 7 64 272316 1598.93 681 666 169.9
B 0 199 215720 1275.04 774 745 168.6
B 0 229 198745 1174.36 774 745 168.6
B 2 249 153540 906.24 774 745 168.6
C 2 12 282552 1348.57 758 752 209.0
C 9 38 264644 1262.87 758 752 209.0
C 13 3 201658 961.45 758 752 209.0
D 6 42 169767 785.49 758 724 215.2
D 7 96 128086 591.81 758 724 215.2
D 11 129 86280 397.55 758 724 215.2

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