ASTROSAT CZTI

Data Quality Report

Orbit 20200626_A09_006T04_9000003738_level2

Creation date: 2025-12-13T02:01:47.504864
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_006T04_9000003738cztM0_level2.fits modeM0/AS1A09_006T04_9000003738cztM0_level2_quad_clean.evt
Size (bytes)197,331,84060,641,280
Size188.2 MB 57.8 MB
Events in quadrant A1,263,682156,995
Events in quadrant B1,221,902159,911
Events in quadrant C1,205,750148,450
Events in quadrant D1,049,958132,697

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0426530
B0385480
C0382770
D0448440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460
B0460
C0460
D0460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17932550.306714%
B17932700.390364%
C179321630.908990%
D179322251.254740%

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 21842 17932 0 0 0.00% 0.00%
B 21842 17932 0 0 0.00% 0.00%
C 21842 17932 0 0 0.00% 0.00%
D 21842 17931 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 1268 12.02 329 312 79.5
A 0 30 1015 8.84 329 312 79.5
A 7 110 965 8.21 329 312 79.5
B 2 9 960 9.94 323 311 65.3
B 5 255 816 7.73 323 311 65.3
B 2 8 787 7.29 323 311 65.3
C 12 241 853 6.75 318 300 81.9
C 1 80 846 6.67 318 300 81.9
C 1 81 831 6.48 318 300 81.9
D 15 46 803 6.56 299 275 80.5
D 10 189 750 5.9 299 275 80.5
D 6 67 742 5.8 299 275 80.5

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