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IAUC 2231: INTERSTELLAR CO; 1969i

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                                                  Circular No. 2231
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


INTERSTELLAR CARBON MONOXIDE
     Dr. William E. Howard, National Radio Astronomy Observatory,
communicates the following announcement.
     The National Radio Astronomy Observatory and the Bell Telephone
Laboratories announce the discovery of interstellar carbon
monoxide (CO) at 115 GHZ (2.6 mm) by Keith B. Jefferts of Bell
Telephone Laboratories, Murray Hill, N.J. and by Arno A. Penzias
and Robert W. Wilson of Bell Telephone Laboratories, Holmdel, N.J.
using the 36 foot telescope of the National Radio Astronomy Observatory
on Kltt Peak.  The CO line was first observed April 4 and
appears in emission in at least five galactic sources including Ori A,
Sgr A, Sgr B2, W39, and W51.
     In Ori A, the chief feature of the CO spectrum is a line 2
MHz (5 km/sec) wide at half intensity with an approximate antenna
temperature of 39K.  This feature has an approximate angular extent
of one degree, larger than the continuum source.  The observed
spectrum in Sgr A is complicated and extends over a range
of at least 100 km/sec.  The radial velocities computed from the
features observed in each of the above sources is in good agreement
with velocities computed for each source from line observations
at longer wavelengths.  Observations are in progress.


COMET BENNETT (1969i)
     B. Milet, Nice Observatory, sends the following precise
positions:

     1970 UT             R. A. (1950) Decl.
     Mar. 30.15820    22 15 50.2    +13 50 37
          30.16230    22 15 50.4    +13 51 19
          30.17829    22 15 53.03   +13 54 15.5
     Apr.  1.12401    22 21 04.99   +19 29 14.1
           1.12677    22 21 05.51   +19 29 39.5
           1.12816    22 21 06.18   +19 30 03.3
           1.15897    22 21 11.73   +19 35 01.0
           1.16244    22 21 12.53   +19 35 22.1
           1.17872    22 21 14.4    +19 38 09
           2.13642    22 24 06.00   +22 14 00.6
           2.13651    22 24 06.32   +22 14 20.4
           2.13858    22 24 06.76   +22 14 42.4


1970 April 9                   (2231)              Richard B. Southworth

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