ASTROSAT CZTI

Data Quality Report

Orbit 20211101_T04_065T01_9000004750_level2

Creation date: 2021-11-02T10:48:54.776629
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/AS1T04_065T01_9000004750cztM0_level2_bc.evt modeM0/AS1T04_065T01_9000004750cztM0_level2_quad_clean.evt
Size (bytes)761,405,760170,631,360
Size726.1 MB 162.7 MB
Events in quadrant A1,998,4041,221,170
Events in quadrant B3,627,0081,206,335
Events in quadrant C2,132,5501,234,696
Events in quadrant D14,624,585820,210

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0199210
B0276050
C0202530
D0609040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02020
B02020
C02020
D02020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9855120.121766%
B98558798.919330%
C9855200.202943%
D9855506851.425672%

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 11228 9854 0 0 0.00% 0.00%
B 11228 9854 24 24 0.21% 0.24%
C 11228 9854 3 3 0.03% 0.03%
D 11228 9852 2893 2893 25.77% 29.36%

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 0 191 41050 366.14 489 480 110.8
A 14 238 19495 171.61 489 480 110.8
A 13 254 17949 157.66 489 480 110.8
B 5 172 1424267 14341.98 481 471 99.3
B 15 54 51420 513.21 481 471 99.3
B 5 200 45862 457.23 481 471 99.3
C 0 10 66747 576.74 486 480 114.9
C 1 241 42859 368.84 486 480 114.9
C 3 233 30874 264.53 486 480 114.9
D 12 227 8839726 91858.32 357 347 96.2
D 8 195 1736300 18039.92 357 347 96.2
D 7 80 720447 7483.24 357 347 96.2

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