Assembling the HST Carina Nebula Mosaic

Details Assembling the HST Carina Nebula Mosaic Assembling the HST Carina Nebula Mosaic

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21113907l&link_type=abstract

American Astronomical Society, AAS Meeting #211, #139.07; Bulletin of the American Astronomical Society, Vol. 39, p.986

Astronomy and Astrophysics

Astronomy

Scientific paper

Hubble Space Telescope has obtained numerous images of the Carina Nebula with ACS/WFC using the F658N filter (Hα+[N II]), revealing exquisite detail in this active star-forming region rich in finely detailed structure. Forty-eight overlapping fields were composited into a nearly contiguous mosaic of WFC pointings, resulting in a monochrome image of roughly 500 megapixels spanning ˜24'×12'. In addition, overlapping, wider-field images obtained with the CTIO 4m and MOSAIC2 camera in three narrow-band filters were combined into a color composite. We demonstrate a luminosity layering technique (LRGB) to reconstruct a high-resolution color image by combining the monochrome HST image with the color composite CTIO data which preserves the high spatial resolution brightness structure superimposed on the lower spatial resolution color values. We also touch on some cosmetic techniques to clean the image, including filling in small areas of data gaps and saturation.

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