ASTROSAT CZTI

Data Quality Report

Orbit 20200819_A09_104T02_9000003826_level2

Creation date: 2021-03-25T22:52:28.080209
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/AS1A09_104T02_9000003826cztM0_level2_bc.evt modeM0/AS1A09_104T02_9000003826cztM0_level2_quad_clean.evt
Size (bytes)4,763,957,7601,359,120,960
Size4.4 GB 1.3 GB
Events in quadrant A22,487,4078,958,335
Events in quadrant B23,209,1779,071,049
Events in quadrant C26,671,6958,557,585
Events in quadrant D64,808,4907,426,931

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021220
B021220
C020180
D021220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02193570
B02216040
C02375630
D03856480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01610
B01610
C01610
D01610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10440110871.041178%
B10440114561.394623%
C10440127692.652273%
D1044011843717.659793%

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 120187 104399 2 2 0.00% 0.00%
B 120187 104393 10 10 0.01% 0.01%
C 120187 104399 77 77 0.06% 0.07%
D 120187 104394 5039 5039 4.19% 4.83%

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 214100 168.0 5765 5661 1240.7
A 13 254 158755 123.39 5765 5661 1240.7
A 0 226 36817 25.11 5765 5661 1240.7
B 0 190 234380 209.66 5802 5654 1090.9
B 5 172 209655 187.0 5802 5654 1090.9
B 0 230 149255 131.63 5802 5654 1090.9
C 2 16 2682351 2097.02 5479 5471 1276.5
C 3 233 2143035 1674.53 5479 5471 1276.5
C 4 254 688295 534.91 5479 5471 1276.5
D 7 80 27646449 23605.95 5095 4958 1171.0
D 1 52 12456492 10633.66 5095 4958 1171.0
D 12 233 2707406 2307.9 5095 4958 1171.0

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