ASTROSAT CZTI

Data Quality Report

Orbit 57631

Creation date: 2026-05-25T09:24:55.520854
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_070T08_9000006576_57631cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57631cztM0_level2_quad_clean.evt
Size (bytes)418,207,680101,977,920
Size398.8 MB 97.3 MB
Events in quadrant A3,115,324665,764
Events in quadrant B3,283,446713,423
Events in quadrant C3,724,515629,541
Events in quadrant D4,811,020589,687

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144730
B0148550
C0162070
D0189660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7021200.284860%
B7022510.726289%
C70221452.064939%
D70222463.503275%

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 7021 7021 8 8 0.11% 0.11%
B 7022 7022 20 20 0.28% 0.28%
C 7022 7022 119 119 1.69% 1.69%
D 7022 7022 252 252 3.59% 3.59%

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 10 251 69214 367.62 753 735 186.3
A 3 245 60938 323.19 753 735 186.3
A 4 249 29801 156.04 753 735 186.3
B 0 245 76783 473.48 743 714 160.7
B 7 252 58253 358.14 743 714 160.7
B 5 185 57017 350.45 743 714 160.7
C 12 2 392756 2001.24 721 713 195.9
C 15 224 278119 1416.06 721 713 195.9
C 14 254 121899 618.61 721 713 195.9
D 8 160 766552 3766.65 719 687 203.3
D 3 12 367679 1804.93 719 687 203.3
D 8 240 224345 1099.99 719 687 203.3

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