ASTROSAT CZTI

Data Quality Report

Orbit 35676

Creation date: 2022-05-04T17:19:52.233581
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/AS1A09_029T02_9000005106_35676cztM0_level2.evt modeM0/AS1A09_029T02_9000005106_35676cztM0_level2_quad_clean.evt
Size (bytes)612,008,640115,531,200
Size583.7 MB 110.2 MB
Events in quadrant A3,332,061776,547
Events in quadrant B6,896,615727,857
Events in quadrant C3,639,491771,095
Events in quadrant D4,193,303736,506

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144131
B0251491
C0151541
D0171911

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6983140.200487%
B6983114416.382644%
C69831211.732780%
D69832143.064585%

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 8416 6984 8 8 0.10% 0.11%
B 8416 6984 953 953 11.32% 13.65%
C 8416 6984 94 94 1.12% 1.35%
D 8416 6984 163 163 1.94% 2.33%

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 132717 829.58 788 772 159.1
A 15 169 89085 555.25 788 772 159.1
A 13 6 28913 176.93 788 772 159.1
B 5 31 1911301 13286.78 739 717 143.8
B 5 172 1205093 8375.6 739 717 143.8
B 5 15 443618 3080.07 739 717 143.8
C 15 214 282107 1615.85 750 755 174.1
C 0 10 236166 1352.0 750 755 174.1
C 1 23 147633 843.54 750 755 174.1
D 13 249 435688 2352.17 755 733 184.9
D 10 118 310506 1675.2 755 733 184.9
D 8 195 156956 844.83 755 733 184.9

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