ASTROSAT CZTI

Data Quality Report

Orbit 20180119_T01_218T01_9000001852_level2

Creation date: 2018-01-22T19:02:05.885448
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/AS1T01_218T01_9000001852cztM0_level2_bc.evt modeM0/AS1T01_218T01_9000001852cztM0_level2_quad_clean.evt
Size (bytes)2,594,900,160952,859,520
Size2.4 GB 908.7 MB
Events in quadrant A16,107,6465,997,699
Events in quadrant B18,651,2206,112,793
Events in quadrant C14,542,8626,021,578
Events in quadrant D24,267,3245,681,080

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01578840
B01663260
C01518580
D01813870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015020
B015020
C015020
D015020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7361010911.482136%
B7361019782.687135%
C736107060.959109%
D7361022373.038989%

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 85506 73613 0 0 0.00% 0.00%
B 85506 73609 50 50 0.06% 0.07%
C 85506 73612 6 6 0.01% 0.01%
D 85506 73610 456 456 0.53% 0.62%

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 12 189 1098914 1344.96 3735 3658 814.3
A 1 162 350744 426.22 3735 3658 814.3
A 8 6 81433 95.51 3735 3658 814.3
B 4 239 2716980 3819.46 3777 3674 710.4
B 0 214 274832 381.7 3777 3674 710.4
B 3 64 267292 371.09 3777 3674 710.4
C 14 234 135995 165.15 3668 3616 801.6
C 13 61 21997 22.93 3668 3616 801.6
C 12 4 16218 15.72 3668 3616 801.6
D 1 52 6307232 7459.85 3638 3502 845.0
D 1 255 1820108 2149.78 3638 3502 845.0
D 8 195 480017 563.91 3638 3502 845.0

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