Image Technical Details: The GMOS-South commissioning image of HCG 87 was obtained on May 25, 2003 and was combined from 3 images obtained in the following filters: Filter: g' Wavelength Interval [nm] = 398-552 Effective Wavelength [nm] =475 Integration Times: 3X300 seconds Image Quality: 0.51 arcseconds (combined image) Filter r' Wavelength Interval [nm] = 562-698 Effective Wavelength [nm] =630 Integration Times: 3X180 seconds Image Quality: 0.39 arcseconds (combined image) Filter i' Wavelength Interval [nm] = 706-850 Effective Wavelength [nm] =780 Integration Times: 6X120 seconds Image Quality: 0.36 arcseconds (combined image) The field of view of the image is 4 x 4 arcminutes with a pixel scale = 0.073 arcs "unbin" mode was used to image the group. |