COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1035

                                      Konkoly Observatory
                                      Budapest
                                      1975 August 14


        CSV 100778: A VARIABLE CARBON STAR
         PROBABLY IDENTICAL WITH AS 137


   We recently noted that the extremely red carbon star Case 610
(No. 606 in the catalog of Stephenson, 1973) is identical with the
suspected variable CSV 100778 first detected by Hetzler (1937).
Although the positions given in these two sources are not in exact
agreement, the identification is confirmed by a comparison of Hetzler's
identification chart with objective-prism plates from the files of the
Warner and Swasey Observatory. The 1900 coordinates, alpha = 6h48.1m,
delta = -12d02.6', closely coincide with those of the H_alpha-emission-line star
AS 137 listed by Merrill and Burwell (1950). On a Kodak 103a-F
objective-prism plate taken with the Curtis Schmidt telescope at Cerro
Tololo on March 1, 1968, one does not see Halpha in emission in CSV 100778.
Since there are not other emission-line stars observed near this
position, it appears likely that this is a long-period variable in
which the hydrogen emission emerges near maxima light. This is 
consistent with the fact that Merrill and Burwell list AS 137 as being of
the 9th visual magnitude when the emission was observed as compared
with Stephenson's estimate of V = 12.1 on the above-mentioned
objective-prism plate taken on March 1, 1968.


                       N. SANDULEAK
                  Warner and Swasey Observatory
                  Case Western Reserve University
                   East Cleveland, Ohio, U.S.A.



References:

Hetzler, C. 1937, Astrophys. J., 86, 509. [BIBCODE 1937ApJ....86..509H ]
Merrill, P.W., and Burwell, C. 1950, Astrophys. J., 112, 72. [BIBCODE 1950ApJ...112...72M ]
Stephenson, C.B. 1973, A General Catalog of Cool Carbon Stars, Pub.
  of the Warner and Swasey Obs., Vol. 1, No. 4. [BIBCODE 1973PW&SO....1...1S ]