ASTROSAT CZTI

Data Quality Report

Orbit 51721

Creation date: 2025-04-22T12:01:25.108753
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/AS1A13_031T01_9000006462_51721cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51721cztM0_level2_quad_clean.evt
Size (bytes)1,472,483,520269,588,160
Size1.4 GB 257.1 MB
Events in quadrant A17,407,1721,717,516
Events in quadrant B10,013,3311,908,249
Events in quadrant C12,731,3401,654,921
Events in quadrant D12,864,5531,552,926

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0653282
B0436525
C0517532
D0522572

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1928910705.547203%
B192884612.390087%
C1929011075.738725%
D1929010575.479523%

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 20199 19290 680 680 3.37% 3.53%
B 20200 19291 234 234 1.16% 1.21%
C 20200 19292 855 855 4.23% 4.43%
D 20200 19293 767 767 3.80% 3.98%

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 4970935 10127.14 2012 1964 490.7
A 11 3 995264 2024.42 2012 1964 490.7
A 8 248 896492 1823.11 2012 1964 490.7
B 10 44 501272 1158.16 2026 1952 431.1
B 0 213 240706 553.78 2026 1952 431.1
B 8 128 165614 379.61 2026 1952 431.1
C 13 3 1200505 2223.89 1973 1956 538.9
C 0 209 803287 1486.86 1973 1956 538.9
C 15 199 715926 1324.76 1973 1956 538.9
D 7 60 1407816 2604.13 1949 1875 539.9
D 7 110 595567 1099.66 1949 1875 539.9
D 2 249 514989 950.41 1949 1875 539.9

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