ASTROSAT CZTI

Data Quality Report

Orbit 20200813_A09_088T01_9000003812_level2

Creation date: 2025-12-14T09:04:27.696253
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/AS1A09_088T01_9000003812cztM0_level2.fits modeM0/AS1A09_088T01_9000003812cztM0_level2_quad_clean.evt
Size (bytes)1,270,054,0801,285,810,560
Size1.2 GB 1.2 GB
Events in quadrant A8,170,5788,359,762
Events in quadrant B7,902,6908,507,067
Events in quadrant C7,138,2646,744,518
Events in quadrant D6,128,7926,230,666

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A027100
B027100
C027100
D027100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02110
B02110
C02110
D02110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02850310
B02772630
C05084080
D05684870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13274922131.667056%
B13274917231.297938%
C1327492763520.817483%
D1327493164523.838221%

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 154019 132733 0 0 0.00% 0.00%
B 154019 132741 0 0 0.00% 0.00%
C 154019 132576 0 0 0.00% 0.00%
D 154019 132147 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 6691 8.96 2131 2007 522.5
A 7 110 6437 8.48 2131 2007 522.5
A 9 19 6215 8.05 2131 2007 522.5
B 2 9 6279 10.7 2088 2002 399.9
B 2 8 5238 8.09 2088 2002 399.9
B 5 128 5177 7.94 2088 2002 399.9
C 12 241 5003 6.76 1891 1777 476.8
C 9 209 4821 6.38 1891 1777 476.8
C 12 250 4785 6.31 1891 1777 476.8
D 3 14 4384 6.03 1747 1594 462.7
D 6 231 4338 5.93 1747 1594 462.7
D 15 46 4294 5.83 1747 1594 462.7

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