Using images from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE), we have identified more than 300 extended 4.5 μm sources (Extended Green Objects (EGOs), for the common coding of the [4.5] band as green in three-color composite InfraRed Array Camera images). We present a catalog of these EGOs, including integrated flux density measurements at 3.6, 4.5, 5.8, 8.0, and 24 μm from GLIMPSE and the Multiband Imaging Photometer for Spitzer Galactic Plane Survey. The average angular separation between a source in our sample and the nearest IRAS point source is greater than 1 . The majority of EGOs are associated with infrared dark clouds (IRDCs), and where high-resolution 6.7 GHz CH 3 OH maser surveys overlap the GLIMPSE coverage, EGOs and 6.7 GHz CH 3 OH masers are strongly correlated. Extended 4.5 μm emission is thought to trace shocked molecular gas in protostellar outflows; the association of EGOs with IRDCs and 6.7 GHz CH 3 OH masers suggests that the extended 4.5 μm emission may pinpoint outflows specifically from massive protostars. The mid-IR colors of EGOs lie in regions of color-color space occupied by young protostars still embedded in infalling envelopes.
The Observatory of Nice.* ' The accompanying cuts are copied from Lieutenant Winterhalter's Report on European Observatories, by the kind permission of the Superintendent of the U. S. Naval Observatory (See Publ.A. S. P., vol. Ill, page 40). The short description here given is condensed from that of Lieutenant Winterhalter and from other sources.The Observatory is situated on the brow of Mt. Gros, an hour's drive from Nice, at an altitude of about 1100 feet above the sea.The institution has been built and equipped (and is, I believe, maintained) at the expense of M. R. L. Bischoffsheim, a banker of Paris, who has also made many liberal gifts to other observatories in France. His gifts to the Nice Observatory alone have amounted to something over $1,000,000.The cut shows the Observatory buildings on the plateau of Mt.Gros. The small house in the left foreground is the pavilion for magnetic observations. The Great Dome for the Equatorial of 30 inches aperture and 59 feet focus is next to this, and the gas-works are directly in the rear. The three buildings on the artificial terrace, faced with stone, in the foreground, are the quarters for the astronomers and the library (in the centre). Next to the Great Dome (of which another full-page cut is given) is the Meridian-Circle House, next to this, the Transit House, and nèxt to this, the Laboratory.The Dorpe for the 15-inch equatorial comes next. Other buildings are in course of construction, one of which is to contain a heliometer, and another a photographic equatorial.The Dome rests on a square structure about 87 feet on a side and about 30 feet in height. Within this square structure is a stone * M. Perrotin, Director. m? TT a T Fin MF. OF THE OBSERVATORY OF NICE.
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