Central Bureau for Astronomical Telegrams
IAUC 6267: 1995ao, 1995ap; GRS 1915+105
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Circular No. 6267
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)
SUPERNOVAE 1995ao AND 1995ap IN ANONYMOUS GALAXIES
R. P. Kirshner, Center for Astrophysics (CfA), reports the
discovery of two supernovae on behalf of the High-Z Supernova
Search Team. The first object (SN 1995ao) is located at R.A. =
2h57m30s.70, Decl. = -1o41'19".8 (equinox 2000.0); a nearby
foreground star has position end figures 32s.15, 40'43".5. The
second object (SN 1995ap) is located at R.A. = 3h12m28s.13, Decl. =
+0o41'43".4; a nearby star has position end figures 27s.23, 55".7.
Both supernovae were discovered on frames taken by M. Phillips
(Cerro Tololo) and B. Schmidt (Mount Stromlo and Siding Spring
Observatories) with the Cerro Tololo 4-m telescope on Nov. 18 UT at
R about 21.5. SN 1995ao was not present to R = 22.5 on a similar
frame taken on Oct. 28. SN 1995ap was present at R about 22 on a
frame taken on Oct. 28. Spectra obtained at the Multiple Mirror
Telescope (MMT) by R. Kirshner and R. Jayawardhana (CfA) on Nov.
23, and at the Keck telescope by A. V. Filippenko, S. Perlmutter,
A. J. Barth, and I. Hook (University of California, Berkeley),
show that SN 1995ao is a type-Ia event near maximum. The redshift
of the supernova spectrum from the MMT and from Keck agrees with
that of the host galaxy, derived from emission lines in the Keck
spectrum, at z = 0.24. Spectra of SN 1995ap from both the MMT and
Keck telescopes indicate that it is also of type Ia near maximum.
The redshift of the supernova, derived from its spectrum, is about
0.3. Finding charts of these two objects are available via e-mail
from brian@mso.anu.edu.au. Photometric observations of these
objects in V, R, and I would be valuable.
GRS 1915+105
S. S. Eikenberry and G. G. Fazio, CfA, report on near-infrared
observations of GRS 1915+105 during its recent period of hard x-
ray/radio flaring (IAUC 6266), using the Kitt Peak 2.1-m telescope
(+ COB infrared-array camera): "The following magnitudes were
obtained under photometric conditions on Oct. 17.13 UT: J = 17.81
+/- 0.17, H = 15.16 +/- 0.04, K = 13.43 +/- 0.03. Under
nonphotometric conditions, we obtained the following magnitudes on
Oct. 16.09 using differential photometry with other stars in the
field: H = 14.94 +/- 0.09, K = 13.51 +/- 0.05. The magnitudes
and colors closely match those observed by Mirabel et al. (1994,
A.Ap. 282, L17) during similar hard x-ray/radio flaring activity on
1993 June 5. Our data do not reveal any significant night-to-night
variations, in contrast to the night-to-night variations of about 1
magnitude observed by Mirabel et al."
1995 November 28 (6267) Daniel W. E. Green
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