ASTROSAT CZTI

Data Quality Report

Orbit 20161130_A02_124T01_9000000842_level2

Creation date: 2025-11-08T01:30:08.952063
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_124T01_9000000842cztM0_level2.fits modeM0/AS1A02_124T01_9000000842cztM0_level2_quad_clean.evt
Size (bytes)1,322,328,9601,322,424,000
Size1.2 GB 1.2 GB
Events in quadrant A7,945,0067,961,718
Events in quadrant B7,616,8387,650,442
Events in quadrant C7,871,0527,598,699
Events in quadrant D6,760,0306,991,024

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02310
B02290
C02300
D02310

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03088280
B03375040
C03025850
D03365240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A029360
B029480
C029440
D029380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14372216101.120218%
B14399157724.008584%
C14367115551.082334%
D14353132632.273376%

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 174904 144480 0 0 0.00% 0.00%
B 174904 144774 0 0 0.00% 0.00%
C 174904 144413 0 0 0.00% 0.00%
D 174904 144212 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 7768 11.24 2066 1933 519.3
A 7 110 6680 9.14 2066 1933 519.3
A 0 30 6241 8.3 2066 1933 519.3
B 2 9 6588 11.78 2010 1912 396.8
B 14 254 5181 8.24 2010 1912 396.8
B 12 226 5162 8.19 2010 1912 396.8
C 1 80 5787 7.07 2080 1931 545.0
C 1 81 5684 6.89 2080 1931 545.0
C 12 241 5425 6.41 2080 1931 545.0
D 3 14 5077 6.52 1928 1754 509.9
D 6 231 4941 6.25 1928 1754 509.9
D 11 82 4923 6.22 1928 1754 509.9

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