ASTROSAT CZTI

Data Quality Report

Orbit 20190810_C04_001T01_9000003082_level2

Creation date: 2021-08-29T04:58:13.476957
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/AS1C04_001T01_9000003082cztM0_level2_bc.evt modeM0/AS1C04_001T01_9000003082cztM0_level2_quad_clean.evt
Size (bytes)2,393,081,2801,336,939,200
Size2.2 GB 1.2 GB
Events in quadrant A18,339,6099,128,112
Events in quadrant B17,510,5509,124,636
Events in quadrant C13,770,9288,772,867
Events in quadrant D18,121,3408,713,752

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014140
B014140
C014160
D014160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01551480
B01544070
C01428720
D01537760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6940810731.545931%
B6941913271.911580%
C6942310241.475015%
D6942611571.666523%

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 79494 69489 54 54 0.07% 0.08%
B 79494 69488 77 77 0.10% 0.11%
C 79495 69496 1 1 0.00% 0.00%
D 79494 69488 90 90 0.11% 0.13%

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 6 16 3317160 4151.67 3676 3623 798.1
A 5 16 696855 868.58 3676 3623 798.1
A 15 174 197102 242.42 3676 3623 798.1
B 7 220 971161 1406.62 3659 3579 687.9
B 3 64 853313 1235.3 3659 3579 687.9
B 0 219 350881 504.89 3659 3579 687.9
C 7 247 99476 116.19 3495 3482 826.2
C 9 54 89216 103.77 3495 3482 826.2
C 10 91 46656 52.26 3495 3482 826.2
D 1 52 1490953 1758.62 3621 3505 845.8
D 1 20 1257801 1482.96 3621 3505 845.8
D 9 1 390166 457.15 3621 3505 845.8

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