ASTROSAT CZTI

Data Quality Report

Orbit 20211022_A11_044T01_9000004732_level2

Creation date: 2021-10-25T13:52:22.340856
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_044T01_9000004732cztM0_level2_bc.evt modeM0/AS1A11_044T01_9000004732cztM0_level2_quad_clean.evt
Size (bytes)3,824,164,8001,202,330,880
Size3.6 GB 1.1 GB
Events in quadrant A16,561,9358,154,128
Events in quadrant B20,346,6868,214,933
Events in quadrant C17,317,6348,338,010
Events in quadrant D57,341,1807,416,121

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02380
B02380
C02380
D02380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01394690
B01567530
C01383520
D02750540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012840
B012840
C012840
D012840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A626138971.432610%
B6261325774.115759%
C626137001.117979%
D62613785012.537333%

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 86657 62611 56 56 0.06% 0.09%
B 86657 62607 135 135 0.16% 0.22%
C 86657 62611 217 217 0.25% 0.35%
D 86657 62599 2018 2018 2.33% 3.22%

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 14 238 2353000 3257.71 3282 3237 721.3
A 15 17 703381 970.68 3282 3237 721.3
A 9 143 337930 464.02 3282 3237 721.3
B 5 172 3570895 5504.7 3304 3241 648.1
B 0 219 1088413 1674.36 3304 3241 648.1
B 5 200 543927 834.25 3304 3241 648.1
C 0 10 2363548 3115.6 3294 3280 757.6
C 3 233 664374 872.66 3294 3280 757.6
C 14 67 467257 612.46 3294 3280 757.6
D 8 195 24665208 31943.28 3130 3063 772.1
D 2 250 3529437 4567.48 3130 3063 772.1
D 12 6 2863231 3704.59 3130 3063 772.1

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