N44 SuperBubble in LMC –  MRO

N44 SuperBubble in LMC – MRO

Constellation: Dorado
Ra: 5h 21m 37s
Dec: -67d 53m 45s
Distance: 170,000 light years
Image Size: 22' x 22'
North: Left



Selected as the Astronomy Picture of the Day, March, 27, 2008
Full page image in Astronomy, August, 2009, page 72
Mapped color: Astrodon 5 nm H-a = Green; 3 nm OIII =B, 5 nm SII = G; Astrodon E-Series RGB blended in for stars.. The image above spans ~22 arcmin and north is to the left.
A close-up is presented below:

N44 is a large HII region in the LMC about 170,000 light years distant with the size of the "hole" about 250 light years across. It is also designated NGC1929. The large, bluish-white stars in the center of the ring or bubble create enormous stellar winds and form the giant bubble. These stars generally end up exploding as supernovae. It is likely that some of these star have in fact exploded as supernovae, helping to clean out the gases in the central part of the bubble. An X-ray source was found near the center of the bubble, supporting a supernova origin
The link below shows a wonderful view of the complex taken with narrowband filters at Gemini South at Cerro Pachon in Chile, and was awarded an Astronomical Picture of the Day (APOD) on February 6, 2006.
Additional narrowband composite images from La Silla taken by the European Southern Observatory (ESO) in Chile is at:

Lastly, I processed an RGB, H-a and OIII image from a 16" scope and Apogee U47 CCD at Cerro Tololo, Chile about a year ago. Details at:
This image was taken at Macedon Ranges Observatory (MRO) about 2 hours north of Melbourne, Australia.

Exposure: 12 hrs Total; 4 hrs H-a, OIII, 3.5 hrs SII, 0.5 hrs RGB
Telescope: RCOS 12.5
Mount: Software Bisque Paramount ME
Oag: Astrodon MonsterMOAG
Acquisition: CCD AutoPilot3
Calibration: CCDStack
Observatory Site: Macedon Ranges Observatory, Melbourne, Australia
Camera: Apogee U16M
Filters: Astrodon 5 nm H-a, 3nm OIII, Gen 2 RGB
Guider: SBIG ST-402
Camera Operation: MaximDL4.62
Processing: Photoshop CS
Image Date: 02/05/2008

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