ASTROSAT CZTI

Data Quality Report

Orbit 20200725_A09_126T01_9000003772_level2

Creation date: 2021-01-09T19:46:16.802491
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_126T01_9000003772cztM0_level2_bc.evt modeM0/AS1A09_126T01_9000003772cztM0_level2_quad_clean.evt
Size (bytes)1,457,412,480511,171,200
Size1.4 GB 487.5 MB
Events in quadrant A8,242,1523,354,171
Events in quadrant B8,076,1033,381,168
Events in quadrant C7,359,3613,215,175
Events in quadrant D18,019,6813,074,930

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0767440
B0762890
C0753690
D01082630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07320
B07320
C07320
D07320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470
B0470
C0470
D0470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A357665631.574121%
B357666971.948778%
C357668432.356987%
D3576625247.056981%

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 40601 35765 0 0 0.00% 0.00%
B 40601 35762 0 0 0.00% 0.00%
C 40601 35762 0 0 0.00% 0.00%
D 40601 35760 681 681 1.68% 1.90%

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 441157 1013.95 2001 1972 433.1
A 5 98 71540 160.61 2001 1972 433.1
A 13 254 54717 121.77 2001 1972 433.1
B 15 33 132428 346.88 2001 1963 376.1
B 0 190 101431 264.47 2001 1963 376.1
B 0 229 71871 185.87 2001 1963 376.1
C 3 233 50245 108.15 1898 1892 447.1
C 2 16 17737 35.44 1898 1892 447.1
C 13 61 10906 20.16 1898 1892 447.1
D 1 52 9039110 20570.56 1900 1854 439.3
D 7 80 890776 2023.36 1900 1854 439.3
D 12 233 474680 1076.24 1900 1854 439.3

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