ASTROSAT CZTI

Data Quality Report

Orbit 20649

Creation date: 2024-06-27T18:17:50.519356
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/AS1A05_082T09_9000003054_20649cztM0_level2.evt modeM0/AS1A05_082T09_9000003054_20649cztM0_level2_quad_clean.evt
Size (bytes)1,548,429,120216,682,560
Size1.4 GB 206.6 MB
Events in quadrant A13,382,2981,337,606
Events in quadrant B9,438,0001,395,674
Events in quadrant C8,620,1821,341,672
Events in quadrant D14,239,4691,245,418

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0515683
B0391443
C0368844
D0543863

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03640
B03640
C03640
D03640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1801813807.659008%
B180192781.542816%
C180182351.304251%
D1801813277.364857%

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 20033 18020 813 813 4.06% 4.51%
B 20034 18021 46 46 0.23% 0.26%
C 20033 18020 1 1 0.00% 0.01%
D 20033 18020 1096 1096 5.47% 6.08%

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 5 16 5200967 12045.94 2126 2075 431.6
A 0 226 18610 38.31 2126 2075 431.6
A 3 137 17671 36.14 2126 2075 431.6
B 7 220 552074 1337.43 2167 2113 411.2
B 0 197 77096 182.35 2167 2113 411.2
B 6 36 69589 164.09 2167 2113 411.2
C 14 238 325416 658.09 2081 2094 491.3
C 8 208 89005 176.9 2081 2094 491.3
C 7 247 69992 138.2 2081 2094 491.3
D 1 20 3323334 6640.95 2054 1994 500.1
D 1 52 1670801 3336.74 2054 1994 500.1
D 7 238 474837 945.44 2054 1994 500.1

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