ASTROSAT CZTI

Data Quality Report

Orbit 20200502_A08_003T06_9000003636_level2

Creation date: 2020-05-06T08:26:43.046737
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A08_003T06_9000003636cztM0_level2_bc.evt modeM0/AS1A08_003T06_9000003636cztM0_level2_quad_clean.evt
Size (bytes)1,731,516,480564,577,920
Size1.6 GB 538.4 MB
Events in quadrant A11,705,9383,610,858
Events in quadrant B10,020,2133,702,321
Events in quadrant C15,173,9443,405,192
Events in quadrant D12,541,7573,363,691

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08940
B08940
C08940
D08940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980060
B0928240
C01137470
D01007840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0920
C0920
D0920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A439769362.128434%
B439765081.155176%
C4397616053.649718%
D439765891.339367%

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 53082 43979 305 305 0.57% 0.69%
B 53082 43978 1 1 0.00% 0.00%
C 53082 43978 132 132 0.25% 0.30%
D 53082 43979 44 44 0.08% 0.10%

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 6 16 1998976 3740.7 2511 2469 533.7
A 13 254 61459 110.53 2511 2469 533.7
A 0 226 15621 24.64 2511 2469 533.7
B 7 202 65697 132.01 2558 2504 478.7
B 10 251 58537 117.06 2558 2504 478.7
B 0 189 45211 89.22 2558 2504 478.7
C 7 247 4681170 8591.44 2359 2351 544.6
C 2 16 986036 1806.28 2359 2351 544.6
C 10 91 329796 601.27 2359 2351 544.6
D 1 52 2208782 4012.74 2420 2341 549.9
D 12 218 655563 1187.98 2420 2341 549.9
D 8 195 274736 495.39 2420 2341 549.9

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