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IAUC 8700: V2576 Oph = N Oph 2006 No. 2; 2006bp

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                                                  Circular No. 8700
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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V2576 OPHIUCHI = NOVA OPHIUCHI 2006 No. 2
     P. Williams, Heathcote, New South Wales, reports his visual
discovery of a possible nova (mag 10.5) on Apr. 6.565 UT, noting it
to be situated 4'.8 southeast of the nearby R CrB-type variable
V517 Oph (itself invisible near minimum); Williams gave the
position for the new star as R.A. = 17h15m30s, Decl. = -29o09'30"
(equinox 2000.0).  E. O. Waagen, AAVSO, reports the following
precise position for the new object from T. Krajci (Cloudcroft, NM):
R.A. = 17h15m33s.00, Decl. = -29o09'39".9 (20 UCAC2 stars used in
the solution), adding that a nearby USNO-B1.0 star has position end
figures 33s.007, 36".84.  Additional visual magnitude estimates:
Apr. 6.590, 10.4 (Williams); 6.611, 10.4 (Williams); 7.154, 10.2 (P.
Schmeer, Bischmisheim, Germany); 7.552, 9.2 (Williams); 7.575, 9.2
(Williams); 9.531, 9.3 (Williams).
     H. Naito and S. Ozaki, Nishi-Harima Astronomical Observatory;
and H. Yamaoka, Kyushu University, report that a low-resolution
spectrum (resolution 1200 at H_alpha, range 420-680 nm) of this new
object was obtained on Apr. 7.80 UT with the 2.0-m NAYUTA telescope
under hazy conditions.  The spectrum shows a flat continuum with
prominent Balmer lines, showing a P-Cyg profile, and other lines in
absorption, which suggests that it is indeed a classical nova
caught at maximum light.  The H_alpha peak shows a self-absorption
feature; the FWHM of the H_alpha emission is 1470 km/s, and its
absorption minimum is blueshifted by 1720 km/s from the emission
peak obtained by Gaussian fitting.  Yamaoka adds that M. Fujii
(Ibara, Okayama, Japan) also took a spectrum (range 400-850 nm) of
this object on Apr. 7.79, which shows the same features as noted
above.
     E. Kazarovets, Sternberg Astronomical Institute, Moscow
University, reports that the permanent designation V2576 Oph has
been assigned to this nova.


SUPERNOVA 2006bp IN NGC 3953
     S. Nakano, Sumoto, Japan, reports the discovery by K. Itagaki
(Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 16.7) on
unfiltered 20-s CCD exposures taken around Apr. 9.60 UT (limiting
mag 19.5) using a 0.60-m f/5.7 reflector.  The new object has
continued to brighten rapidly, as indicated by Itagaki's additional
magnitudes:  Apr. 9.6136, 16.7; 9.6689, 16.4; 9.7383, 16.0; 9.7835,
15.8.  SN 2006bp is located at R.A. = 11h53m55s.74, Decl. =
+52o21'09".4 (equinox 2000.0), which is 62" east and 93" north of
the center of NGC 3953.  Nothing was visible at this location on
Itagaki's images taken on 2005 Mar. 19 and 2006 Mar. 23 (limiting
mag 19.0).

                      (C) Copyright 2006 CBAT
2006 April 10                  (8700)            Daniel W. E. Green

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