ASTROSAT CZTI

Data Quality Report

Orbit 56661

Creation date: 2026-03-19T17:31:30.335858
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_083T06_9000006558_56661cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56661cztM0_level2_quad_clean.evt
Size (bytes)1,515,634,560258,618,240
Size1.4 GB 246.6 MB
Events in quadrant A11,200,7351,751,808
Events in quadrant B8,936,0001,904,179
Events in quadrant C15,219,4451,457,483
Events in quadrant D19,258,1941,389,194

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03900
B03900
C03900
D03900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0471713
B0406283
C0586804
D0703843

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A192655642.927589%
B192664472.320149%
C19265243512.639502%
D19265236712.286530%

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 20530 19266 189 189 0.92% 0.98%
B 20531 19266 40 40 0.19% 0.21%
C 20530 19266 1875 1875 9.13% 9.73%
D 20530 19265 2230 2230 10.86% 11.58%

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 3 14 1601952 3162.92 2072 2020 505.8
A 0 8 717771 1414.97 2072 2020 505.8
A 3 62 221641 434.17 2072 2020 505.8
B 4 21 218903 493.51 2062 1979 439.6
B 4 156 93392 207.97 2062 1979 439.6
B 10 247 88353 196.5 2062 1979 439.6
C 15 205 3229377 6126.06 1926 1907 526.8
C 15 208 1427201 2705.35 1926 1907 526.8
C 1 16 752023 1423.8 1926 1907 526.8
D 10 199 5992404 10967.6 1942 1860 546.2
D 2 249 3316844 6069.13 1942 1860 546.2
D 8 240 1247185 2279.96 1942 1860 546.2

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