Central Bureau for Astronomical Telegrams
IAUC 6170: 1995N; ALEXIS J1644-032
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Circular No. 6170
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)
Phone 617-495-7244/7440/7444 TWX 710-320-6842 ASTROGRAM CAM
MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)
SUPERNOVA 1995N IN MCG -02-38-017
C. Pollas, Observatoire de la Cote d'Azur, reports his
discovery of a supernova (V about 17.5) on two Technical Pan
Schmidt films taken on May 5.95 and 8.03 UT by D. Albanese and
himself. SN 1995N is located at R.A. = 14h49m28s.27, Decl. =
-10o10'15".4 (equinox 2000.0), which is 34" west and 19" north of
the brightest component of this irregular galaxy complex (also
known as Arp 261). A nearby star of mag 17-18 is at position end
figures 29s.19, 37".3. S. Benetti, P. Bouchet, and H. Schwarz,
European Southern Observatory (ESO), report that preliminary
inspection of a partially-calibrated CCD spectrogram (range 514.4-
692.5 nm, resolution 0.8 nm), obtained on May 9.08 UT with the ESO
3.6-m telescope (+ EFOSC1), confirms that SN 1995N is a peculiar
type-II supernova. H-alpha consists of one component-symmetric
emission (peak measured at 660.1 nm; FWHM = 3.4 nm). Its profile
looks similar to that shown by SN 1993N, about 10 months after
discovery. Narrow emission lines of Fe II at 519.8 nm; blend of
[Fe II], [Fe III], and [Fe VII] at 530.6 nm; [Ca V] at 534.6 nm;
[N II] at 579.2 nm; He I at 591.0 nm; [Fe VII] at 612.6 nm; [O I]
at 634.1 nm; and [Fe X] at 641.5 nm are also present in the
supernova spectrum. The last two lines are superimposed on a
broad bump (with peak at about 634.8 nm; FWHM about 9.0 nm),
probably associated with fast-moving oxygen from the supernova
envelope. The coronal lines detected in this spectrum were also
observed in SN 1988Z (Turatto et al. 1993, MNRAS 262, 128). The
redshift of the parent galaxy (deduced from the H II-region lines
present in the galaxy spectrum) is 0.0060.
ALEXIS J1644-032
D. Roussel-Dupre, on behalf of the ALEXIS team, reports:
"Early on May 4 UT, the ALEXIS extreme-ultraviolet satellite
observed the beginning of a transient event. The location of the
transient is R.A. = 16h44m54s, Decl. = -3o12'.5 (equinox 2000.0;
position accuracy +/- 0o.5). The transient was observable in the
narrow, 66-eV channel (18.3 nm) but not the narrow, 93-eV channel
(13.0 nm); it initially appeared about as bright in Telescope 2B as
HZ 43, which was being observed simultaneously and remained at that
level throughout May 5. Both sources had a countrate of about 0.15
photon cmE-2 sE-1 AE-1. The new source is currently near the edge
of the field of view, making precise flux and position measurements
difficult. Few good candidates for optical counterparts exist
within the error box. Follow-up observations are encouraged."
1995 May 10 (6170) Daniel W. E. Green
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