ASTROSAT CZTI

Data Quality Report

Orbit 20200801_A09_012T04_9000003784_level2

Creation date: 2021-01-09T13:59:46.543762
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_012T04_9000003784cztM0_level2_bc.evt modeM0/AS1A09_012T04_9000003784cztM0_level2_quad_clean.evt
Size (bytes)432,884,160205,223,040
Size412.8 MB 195.7 MB
Events in quadrant A2,781,9231,371,452
Events in quadrant B2,280,2081,396,109
Events in quadrant C2,543,3601,368,649
Events in quadrant D4,762,2231,332,600

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0242440
B0226450
C0236450
D0311680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A107873533.272458%
B107873032.808937%
C107873162.929452%
D107876425.951608%

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 11337 10788 15 15 0.13% 0.14%
B 11337 10787 0 0 0.00% 0.00%
C 11337 10787 0 0 0.00% 0.00%
D 11337 10787 11 11 0.10% 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 0 13 650921 5330.33 551 540 122.0
A 13 254 16340 129.49 551 540 122.0
A 0 226 3463 23.96 551 540 122.0
B 0 190 85436 781.53 556 543 108.6
B 0 230 30685 277.49 556 543 108.6
B 5 172 15888 141.27 556 543 108.6
C 2 16 263173 1993.15 544 540 131.8
C 3 233 173501 1312.62 544 540 131.8
C 8 128 10948 78.99 544 540 131.8
D 1 52 1810510 13934.95 546 528 129.9
D 12 233 683269 5256.38 546 528 129.9
D 13 168 96345 737.69 546 528 129.9

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