Central Bureau for Astronomical Telegrams
IAUC 3094: 1977j; HM Sge; NOVALIKE X-RAY SOURCE IN Nor; 1976g
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Read IAUC 3095
Circular No. 3094
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 Telex: 921428
Telephone: (617) 864-5758
PERIODIC COMET WOLF-HARRINGTON (1977j)
T. Seki, Kochi Observatory, Geisei Station, reports the
independent recovery of this comet on 40-min exposures with the 40-cm
reflector. The comet is diffuse with central condensation.
1977 UT R. A. (1950) Decl. m1
July 23.69792 23 44 56.12 +24 09 50.5 17.5
23.73056 23 44 56.38 +24 10 09.3
HM SAGITTAE
A. A. Boyarchuk, Crimean Astrophysical Observatory, cables
that observations by Belyakina, Noskova and Saveleva show that HM
Sge increased rapidly in brightness from V = 11.49 on July 14 to
V = 11.04 on July 20. The corresponding changes in color were from
B-V = +0.72, U-B = -0.62 to B-V = +0.33, U-B = -0.43.
C. W. McCracken, Goddard Space Flight Center, reports that an
image-tube spectrogram (range 4650-7350 A, dispersion 82 A/mm) was
obtained on July 23.20 UT by L. W. Brown, R. W. Hobbs and himself
with the 91-cm reflector. W. A. Feibelman has identified about 40
emission lines that show that the spectrum is typically that of a
planetary nebula. Lines of H-alpha, H-beta, He I, He II, Si II, [N II],
[O I], [O II], [O III], [S III], [A III] and [A IV] are superposed
on a stellar continuum. Weak lines of [Fe III], [Fe VI], [Cl III]
and [P II] are present, in addition to several unidentified lines
observed in NGC 7027 and other high-excitation planetaries.
NOVALIKE X-RAY SOURCE IN NORMA
R. Doxsey, G. Clark and F. Li, Massachusetts Institute of Technology,
have refined the position of this object (cf. IAUC 3090) to
R.A. = 16h08m51s.9, Decl. = -52o18'01" (equinox 1950.0), with a
90-percent-confidence error radius of 30". The measurement was made by SAS 3
on July 24 when the flux in the energy range 1-10 keV was again
approximately 4 x 10**-8 erg cm**-2 s**-1 (~ 1.1 times the Crab).
COMET HARLAN (1976g)
Corrigendum: IAUC 3011. On 1976 June 5.24493 and 5.25552 UT,
R.A. (1950) should read 13h02m.52, not 13h02m.56.
1977 August 3 (3094) Brian G. Marsden
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