ASTROSAT CZTI

Data Quality Report

Orbit 20161019_A02_149T01_9000000740_level2

Creation date: 2025-11-07T02:20:11.170713
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/AS1A02_149T01_9000000740cztM0_level2.fits modeM0/AS1A02_149T01_9000000740cztM0_level2_quad_clean.evt
Size (bytes)1,364,227,2001,333,123,200
Size1.3 GB 1.2 GB
Events in quadrant A8,240,7827,841,733
Events in quadrant B8,011,9407,882,231
Events in quadrant C8,137,6807,699,413
Events in quadrant D6,930,6106,959,126

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02140
B02140
C02140
D02140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029660
B029680
C029600
D029620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03048910
B03143780
C03007670
D03248630

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14587427361.875591%
B14583226081.788359%
C14588312670.868504%
D14585227631.894386%

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 167591 146222 0 0 0.00% 0.00%
B 167591 146211 0 0 0.00% 0.00%
C 167591 146216 0 0 0.00% 0.00%
D 167591 146180 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 7972 11.0 2145 1998 543.2
A 7 110 6979 9.17 2145 1998 543.2
A 0 30 6171 7.68 2145 1998 543.2
B 2 9 6767 11.13 2113 2002 428.3
B 12 226 5680 8.59 2113 2002 428.3
B 5 128 5393 7.92 2113 2002 428.3
C 1 80 5793 6.73 2148 1982 566.7
C 1 81 5595 6.38 2148 1982 566.7
C 12 241 5594 6.37 2148 1982 566.7
D 3 14 5196 6.41 1984 1797 529.8
D 6 231 5130 6.29 1984 1797 529.8
D 7 5 5078 6.19 1984 1797 529.8

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