ASTROSAT CZTI

Data Quality Report

Orbit 55566

Creation date: 2026-01-04T23:42:17.140426
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_55566cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55566cztM0_level2_quad_clean.evt
Size (bytes)616,224,960106,542,720
Size587.7 MB 101.6 MB
Events in quadrant A3,671,193732,700
Events in quadrant B3,623,609784,277
Events in quadrant C9,929,395528,682
Events in quadrant D4,980,540637,566

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0168800
B0168150
C0350040
D0204680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7804510.653511%
B78041051.345464%
C7804193924.846233%
D78043063.921066%

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 7804 7804 22 22 0.28% 0.28%
B 7803 7803 27 27 0.35% 0.35%
C 7804 7804 1883 1883 24.13% 24.13%
D 7803 7803 250 250 3.20% 3.20%

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 179277 881.64 825 804 202.4
A 8 9 76583 374.34 825 804 202.4
A 15 32 73775 360.47 825 804 202.4
B 5 172 157708 900.66 812 779 174.2
B 4 169 104860 597.35 812 779 174.2
B 7 252 50032 282.68 812 779 174.2
C 9 38 3433440 17680.48 719 709 194.2
C 13 3 3389633 17454.85 719 709 194.2
C 3 242 74002 377.5 719 709 194.2
D 2 120 760088 3408.1 796 760 222.8
D 8 245 443952 1989.18 796 760 222.8
D 11 129 316946 1419.14 796 760 222.8

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