ASTROSAT CZTI

Data Quality Report

Orbit 20220401_T05_020T01_9000005050_level2

Creation date: 2022-04-05T11:15:58.036871
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/AS1T05_020T01_9000005050cztM0_level2_bc.evt modeM0/AS1T05_020T01_9000005050cztM0_level2_quad_clean.evt
Size (bytes)5,600,246,400810,158,400
Size5.2 GB 772.6 MB
Events in quadrant A15,813,1475,387,676
Events in quadrant B54,428,3564,668,967
Events in quadrant C21,068,8285,291,759
Events in quadrant D73,677,2474,510,871

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013860
B013860
C013860
D013860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01418560
B03294310
C01569660
D03288690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02490
B02500
C02500
D02500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A681301450.212828%
B681292321434.073596%
C6813010271.507412%
D681301690424.811390%

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 92154 68145 26 26 0.03% 0.04%
B 92153 68119 721 721 0.78% 1.06%
C 92153 68131 173 173 0.19% 0.25%
D 92153 68128 10225 10225 11.10% 15.01%

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 10 83 923405 1153.75 3657 3612 797.2
A 13 6 188025 231.32 3657 3612 797.2
A 9 143 149924 183.53 3657 3612 797.2
B 5 236 40445276 65253.46 3125 3062 619.8
B 5 172 577988 927.64 3125 3062 619.8
B 3 112 481482 771.93 3125 3062 619.8
C 15 214 2678760 3316.98 3543 3530 806.5
C 0 10 2143907 2653.83 3543 3530 806.5
C 1 23 1294735 1600.95 3543 3530 806.5
D 8 195 38859104 50605.45 3209 3112 767.8
D 7 80 14606663 19019.44 3209 3112 767.8
D 2 250 1296124 1684.0 3209 3112 767.8

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