Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8848: V2467 Cyg; C/2007 J1-J6; 8P

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 8847 SEARCH Read IAUC 8849

View IAUC 8848 in .dvi, .ps or .PDF format.
IAUC number 

                                                  Circular No. 8848
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


V2467 CYGNI
     S. Mazuk, D. K. Lynch, R. J. Rudy, R. W. Russell, R. L.
Pearson, The Aerospace Corporation; C. E. Woodward, University of
Minnesota; R. C. Puetter, Center for Astrophysics and Space Science,
University of California at San Diego; and R. B. Perry, Langley
Research Center, NASA, report 0.4- to 2.5-micron spectroscopy of
this nova (cf. IAUC 8821) using the Lick 3-m telescope (+ VNIRIS)
on May 7 UT, as well as 0.8- to 5.5-micron spectroscopy using the
Infrared Telescope Facility 3-m telescope (+ SpeX) on May 31.  The
spectrum increased in excitation between the two epochs, displaying
coronal lines of [Si VI], [Si VII], [Ca VIII], [S VIII], and [S IX]
at the later date.  All coronal lines had complex profiles.  He II
emission was also present, in addition to the unidentified novae
lines (Rudy et al. 2002, Ap.J. 573, 794) at 1.11, 1.19, 1.55, and
2.10 microns.  Despite the presence of these high-excitation
features, emission from C I, N I, and O I persisted.  There was no
evidence of dust formation.  The interstellar reddening derived
from the O I lines was E(B-V) = 1.5.


COMETS C/2007 J1-J6 (SOHO)
     Additional near-sun comets (cf. IAUC 8847) have been found on
SOHO website images -- all being Kreutz sungrazers except for
C/2007 J1 (Meyer group).  C/2007 J1 was stellar in appearance and
reached mag about 6.  C/2007 J5 was fuzzy, very faint, and tailless.
C/2007 J6 was very diffuse and somewhat elongated, with a hint of a
tail.  The remaining three objects were very small, slightly
diffuse, and faint (mag about 7.5-8).

 Comet       2007 UT      R.A.(2000)Decl.   Inst.  F    MPEC
 C/2007 J1   May  2.579    2 43.5  +15 29   C3/2   RK   2007-L03
 C/2007 J2        3.121    2 44.8  +14 17   C2     BZ   2007-L03
 C/2007 J3        4.746    2 54.4  +14 17   C3/2   TH   2007-L03
 C/2007 J4        4.771    2 50.9  +14 43   C2     TH   2007-L03
 C/2007 J5        7.538    3 01.3  +15 25   C2     BZ   2007-L16
 C/2007 J6        9.146    3 06.3  +15 48   C2     BZ   2007-L16


COMET 8P/TUTTLE
     C. W. Hergenrother reports his recovery of this comet as a
stellar object of mag 20.3-20.4 in co-added CCD exposures taken on
Apr. 22.5 and 26.5 UT with the Catalina 1.54-m reflector.  The
astrometry, revised orbital elements, and an ephemeris appear on
MPEC 2007-L45.

                      (C) Copyright 2007 CBAT
2007 June 12                   (8848)            Daniel W. E. Green

Read IAUC 8847 SEARCH Read IAUC 8849

View IAUC 8848 in .dvi, .ps or .PDF format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!