Sky's Up Global Astronomy Magazine Volume III (September 2021) | Page 66

HIGH-RESOLUTION WHITE LIGHT ( CONTINUUM ) IMAGING
Figure 7- Registax : Reset the Wavelet filter ( 500 to 1000 center value )
COURTESY OF Pedro Ré
COURTESY OF Pedro Ré
Figure 8- Registax : Use layer 1 , 2 and 3 of Wavelet filter - gaussian ( try several options )
Figure 9- Registax : DO ALL button
COURTESY OF Pedro Ré
1 . Acquire high resolution High- Resolution WL images 2 . Save AVI files ( 8 bits ) or SER files ( 12 bits ) 3 . Open AVISTACK http :// www . avistack . de / or AUTOSTAKKERT http :// ww . autostakkert . com / 4 . Select AVI or SER files - Open movie ( Avistack ) 5 . Turn off Update display ( Avistack ) 6 . Choose Batch processing 7 . Open REGISTAX http :// www . astronomie . be / registax / 8 . Open FIT file ( aligned and stacked in Avisatck ) 9 . Process the stacked image using Wavelet-based image restoration algorithms 10 . Reset the Wavelet filter ( 500 to 1000 center value ) Wavelet Tab ( Figure 7 ) 11 . Use layer 1 , 2 and 3 of Wavelet filter - Gaussian ( try several options ) Wavelet-based image restoration ( Figure 8 ) 12 . Process image ( DO ALL button ) ( Figure 9 ) 13 . Save image ( 16-bit TIFF file ) Save TIFF 16-bit 14 . Process TIFF file in Photoshop 15 . Use Smart Sharpen ( Figure 10 ) 16 . Use Curves to adjust contrast and brightness ( Figure 11 ) 17 . Use False Colour Mapping ( Figure 12 ) 18 . Save the final 16-bit TIF file ( no compression ) 19 . Convert to 8-bit and save JPG file ( no compression )
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the key to your sky W il T irion created by W il T irion NORTH NORTH 0°N URSA MAJOR LEO MINOR Ho riz on 3 Hor izon 50°N 0°N CANES VENATICI LYNX CANCER Ho riz on 2 URSA MAJOR Hor izon 40°N 0°N URSA MINOR 0°N DRACO CAMELOPARDALIS Ho rizo n 1 Polaris Ho rizo n 6 created by the key to your sky BOOTES Pollux M13 Castor CORONA BOREALIS LYNX GEMINI Capella DRACO AURIGA Double Cluster HERCULES Deneb Algol LYRA CYGNUS LACERTA OPHIUCHUS VULPECULA Betelgeuse Double Cluster PERSEUS Vega CEPHEUS LYRA SAGITTA SERPENS CAUDA Altair PISCES DELPHINUS Algol PEGASUS TAURUS Aldebaran ORION M42 Pleiades Hyades OPHIUCHUS CASSIOPEIA CYGNUS Deneb LACERTA TRIANGULUM M31 VULPECULA ANDROMEDA EQUULEUS AQUILA TAURUS Mira SERPENS CAUDA SAGITTA ARIES Altair SCUTUM AQUARIUS ERIDANUS LEPUS CETUS PISCES ECLI CAPRICORNUS PTIC M22 CAELUM DORADO D AUTUMN SKY For observers at 10° to 30° northern latitudes INDUS TUCANA RETICULUM PAVO HYDRUS OCTANS SOUTH SAGITTARIUS AQUARIUS n 2 rizo Ho CAPRICORNUS Hor izon 60°N 0°N Fomalhaut TELESCOPIUM 1 on riz Ho 47 Tuc SMC IC 0°N HOROLOGIUM Achernar PT CETUS CORONA AUSTRALIS n 3 izo Hor GRUS PHOENIX LI ERIDANUS PISCIS AUSTRINUS MICROSCOPIUM EC Mira M8 SAGITTARIUS FORNAX AQUILA EQUULEUS Fomalhaut SCULPTOR SCUTUM DELPHINUS PEGASUS 66 ARIES Rigel Capella M35 ANDROMEDA M31 Hyades ORION HERCULES AURIGA Pleiades Aldebaran Polaris CAMELOPARDALIS CASSIOPEIA TRIANGULUM M13 URSA MINOR Vega PERSEUS Betelgeuse GEMINI CEPHEUS M35 N 0° FORNAX D AUTUMN SKY For observers at 40° to 60° northern latitudes Hor izon 50°N Ho riz on 4 SCULPTOR 0°N PISCIS AUSTRINUS MICROSCOPIUM GRUS PHOENIX SOUTH 67