ASTROSAT CZTI

Data Quality Report

Orbit 55546

Creation date: 2026-01-03T14:43:09.603816
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_55546cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55546cztM0_level2_quad_clean.evt
Size (bytes)500,077,44077,302,080
Size476.9 MB 73.7 MB
Events in quadrant A2,550,760555,048
Events in quadrant B2,634,007595,418
Events in quadrant C3,299,069515,925
Events in quadrant D9,572,636266,671

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121041
B0124391
C0142211
D0324072

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5835420.719794%
B5835580.994002%
C58361382.364633%
D5835290649.802913%

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 6920 5836 13 13 0.19% 0.22%
B 6920 5836 15 15 0.22% 0.26%
C 6921 5837 117 117 1.69% 2.00%
D 6920 5836 2897 2897 41.86% 49.64%

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 125137 840.56 600 585 148.2
A 4 3 57067 381.18 600 585 148.2
A 13 254 13228 85.32 600 585 148.2
B 4 206 92344 722.76 591 570 127.0
B 0 171 72800 568.84 591 570 127.0
B 10 247 53025 413.1 591 570 127.0
C 9 38 639992 4059.25 570 563 157.5
C 13 3 188909 1195.67 570 563 157.5
C 12 252 94648 597.27 570 563 157.5
D 7 70 7292055 63960.84 401 381 114.0
D 6 239 330997 2900.08 401 381 114.0
D 11 129 123986 1084.23 401 381 114.0

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