ASTROSAT CZTI

Data Quality Report

Orbit 20211121_A11_046T01_9000004776_level2

Creation date: 2021-11-23T11:41:09.281599
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/AS1A11_046T01_9000004776cztM0_level2_bc.evt modeM0/AS1A11_046T01_9000004776cztM0_level2_quad_clean.evt
Size (bytes)2,189,404,800654,376,320
Size2.0 GB 624.1 MB
Events in quadrant A20,669,9794,260,272
Events in quadrant B13,790,8364,501,065
Events in quadrant C8,172,0674,524,833
Events in quadrant D21,401,7054,236,883

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06840
B06840
C06840
D06840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01338800
B0947100
C0703610
D01171970

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01490
B01490
C01490
D01490

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A33407757522.674888%
B3340723016.887778%
C334071980.592690%
D3340718565.555722%

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 48261 33407 77 77 0.16% 0.23%
B 48261 33405 187 187 0.39% 0.56%
C 48261 33407 23 23 0.05% 0.07%
D 48261 33406 274 274 0.57% 0.82%

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 15 169 13892981 37270.29 1724 1708 372.7
A 13 6 72704 190.48 1724 1708 372.7
A 13 254 51446 133.45 1724 1708 372.7
B 5 172 3883874 10940.65 1807 1773 354.8
B 4 170 841051 2365.28 1807 1773 354.8
B 5 200 683811 1922.14 1807 1773 354.8
C 0 10 548778 1345.61 1788 1781 406.5
C 10 49 287235 702.22 1788 1781 406.5
C 3 233 101659 245.7 1788 1781 406.5
D 8 195 9684884 21133.71 1783 1747 458.2
D 12 3 1191165 2595.94 1783 1747 458.2
D 2 250 829022 1805.55 1783 1747 458.2

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