ASTROSAT CZTI

Data Quality Report

Orbit 20201225_A10_101T02_9000004084_level2

Creation date: 2025-12-18T21:06:26.388923
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/AS1A10_101T02_9000004084cztM0_level2.fits modeM0/AS1A10_101T02_9000004084cztM0_level2_quad_clean.evt
Size (bytes)1,295,130,2401,003,628,160
Size1.2 GB 957.1 MB
Events in quadrant A8,027,3525,665,175
Events in quadrant B7,731,3485,674,958
Events in quadrant C7,814,6425,350,336
Events in quadrant D6,679,0364,734,323

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02782110
B02932040
C02762300
D04032400

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A026580
B026580
C026580
D026580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01980
B01980
C01980
D01980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13089324151.845018%
B13089328442.172767%
C13089328912.208674%
D13089375265.749735%

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 150448 130884 0 0 0.00% 0.00%
B 150448 130880 0 0 0.00% 0.00%
C 150448 130883 0 0 0.00% 0.00%
D 150448 130814 0 0 0.00% 0.00%

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 29 7573 11.05 2089 1961 507.7
A 7 110 6361 8.67 2089 1961 507.7
A 0 30 5996 7.95 2089 1961 507.7
B 2 9 6121 10.5 2043 1949 397.3
B 2 8 5171 8.11 2043 1949 397.3
B 3 17 5167 8.1 2043 1949 397.3
C 1 80 5977 7.78 2062 1921 521.4
C 1 81 5909 7.65 2062 1921 521.4
C 12 241 5447 6.76 2062 1921 521.4
D 3 14 4841 6.11 1904 1729 509.0
D 7 3 4705 5.85 1904 1729 509.0
D 6 67 4614 5.67 1904 1729 509.0

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