ASTROSAT CZTI

Data Quality Report

Orbit 20200426_A07_147T01_9000003624_level2

Creation date: 2025-12-10T17:08:35.737034
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/AS1A07_147T01_9000003624cztM0_level2.fits modeM0/AS1A07_147T01_9000003624cztM0_level2_quad_clean.evt
Size (bytes)1,302,505,9201,039,455,360
Size1.2 GB 991.3 MB
Events in quadrant A8,294,8666,103,430
Events in quadrant B7,522,5605,710,896
Events in quadrant C7,875,8245,656,697
Events in quadrant D6,976,7845,231,584

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02682880
B03278910
C02837880
D02902820

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A026100
B026100
C026100
D026100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12804715591.217522%
B128046100157.821408%
C12804729502.303842%
D12804720591.608003%

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 149882 128048 0 0 0.00% 0.00%
B 149882 125700 0 0 0.00% 0.00%
C 149881 128047 0 0 0.00% 0.00%
D 149882 128034 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 7927 11.39 2157 2025 518.0
A 7 110 6577 8.79 2157 2025 518.0
A 0 30 6155 7.97 2157 2025 518.0
B 2 9 5999 10.57 1988 1895 388.3
B 2 8 5026 8.06 1988 1895 388.3
B 5 232 4924 7.8 1988 1895 388.3
C 1 81 5953 7.63 2079 1947 524.8
C 1 80 5866 7.47 2079 1947 524.8
C 3 126 5364 6.51 2079 1947 524.8
D 7 3 4975 6.12 1989 1817 515.8
D 15 46 4924 6.02 1989 1817 515.8
D 6 67 4823 5.83 1989 1817 515.8

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