Caption: PR Photo 12h/03 shows a 90-second K-band exposure of the central 6 x 13 arcsec2 around the Galactic Center obtained by MACAO-VLTI under average atmospheric conditions (0.8 arcsec seeing). Although the 14.6 magnitude guide star is located roughly 20 arcsec from the field center - this leading to isoplanatic degradation of image sharpness - the present image is nearly diffraction limited and has a point-source FWHM of about 0.115 arcsec.
置顶卡
变色卡
千斤顶
显身卡