ASTROSAT CZTI

Data Quality Report

Orbit 20161221_A02_170T03_9000000910_level2

Creation date: 2025-11-08T20:08:38.901830
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_170T03_9000000910cztM0_level2.fits modeM0/AS1A02_170T03_9000000910cztM0_level2_quad_clean.evt
Size (bytes)160,534,080135,037,440
Size153.1 MB 128.8 MB
Events in quadrant A967,814790,162
Events in quadrant B985,126785,130
Events in quadrant C1,003,170760,088
Events in quadrant D660,798510,403

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0417230
B0403580
C0398170
D0723270

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0500
B0500
C0500
D0500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03680
B03680
C03680
D03680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A180293812.113262%
B180292521.397748%
C180292451.358922%
D18029500427.755283%

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 23044 17729 0 0 0.00% 0.00%
B 23044 17873 0 0 0.00% 0.00%
C 23044 17940 0 0 0.00% 0.00%
D 23044 17068 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 14 188 1034 12.34 251 236 64.7
A 0 29 997 11.77 251 236 64.7
A 14 204 914 10.49 251 236 64.7
B 2 9 836 11.01 259 247 53.5
B 5 128 690 8.28 259 247 53.5
B 3 80 674 7.98 259 247 53.5
C 12 250 806 8.0 264 247 69.9
C 9 188 735 6.98 264 247 69.9
C 1 80 733 6.95 264 247 69.9
D 3 14 513 6.53 188 171 52.4
D 4 246 504 6.36 188 171 52.4
D 7 5 503 6.34 188 171 52.4

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