ASTROSAT CZTI

Data Quality Report

Orbit 20161030_A02_174T01_9000000766_level2

Creation date: 2021-08-24T18:12:11.028725
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/AS1A02_174T01_9000000766cztM0_level2_bc.evt modeM0/AS1A02_174T01_9000000766cztM0_level2_quad_clean.evt
Size (bytes)4,507,387,2001,154,664,000
Size4.2 GB 1.1 GB
Events in quadrant A6,766,5742,592,082
Events in quadrant B28,150,7638,821,044
Events in quadrant C25,993,0878,720,266
Events in quadrant D68,704,2817,890,277

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01820
B01810
C01810
D01820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0729910
B02664640
C02591520
D03978140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024740
B024760
C024800
D024880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A356702410.675638%
B12141026812.208220%
C12139017471.439163%
D121095112179.262975%

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 45181 37004 6 6 0.01% 0.02%
B 143543 123518 61 61 0.04% 0.05%
C 143543 123440 126 126 0.09% 0.10%
D 143543 123350 3866 3866 2.69% 3.13%

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 15 234 63646 164.91 1719 1679 375.8
A 15 236 52408 135.0 1719 1679 375.8
A 7 16 17846 43.02 1719 1679 375.8
B 15 255 2042973 1840.55 5847 5678 1106.9
B 0 214 791854 710.25 5847 5678 1106.9
B 15 204 706199 632.87 5847 5678 1106.9
C 9 247 3261909 2572.35 5709 5611 1265.9
C 1 16 217484 167.37 5709 5611 1265.9
C 9 68 50478 35.44 5709 5611 1265.9
D 1 20 32417364 24164.63 5536 5301 1341.3
D 2 152 5789635 4312.48 5536 5301 1341.3
D 2 63 2529467 1881.88 5536 5301 1341.3

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