From quai@cbatmpc.harvard.edu Fri Jun 19 22:53:34 1998 Return-Path: Received: [ from aip.de by abrixas.obs.aip.de (8.8.7/8.8.7) with SMTP id WAA17863 for ; Fri, 19 Jun 1998 22:53:33 +0200 (MET DST)] Received: from cfa.harvard.edu by marlowe (4.1/SMI-4.2-apr170795) id AA02640; Fri, 19 Jun 98 22:53:17 MES Received: from cbatmpc.harvard.edu (cbatmpc.harvard.edu [131.142.10.57]) by cfa.harvard.edu (8.8.5/8.7.3) with SMTP id QAA11530 for ; Fri, 19 Jun 1998 16:53:16 -0400 (EDT) Received: by cbatmpc.harvard.edu (SMI-8.6/SMI-SVR4) id QAA04372; Fri, 19 Jun 1998 16:53:19 -0400 Date: Fri, 19 Jun 1998 16:53:19 -0400 From: quai@cbatmpc.harvard.edu (IAUC mailing list) Message-Id: <199806192053.QAA04372@cbatmpc.harvard.edu> To: iau-circulars@aip.de Subject: IAUC 6948: SGR 1627-41; C/1998 K2 Status: RO Circular No. 6948 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) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) SGR 1627-41 P. Woods, M. Kippen, and Jan van Paradijs, University of Alabama in Huntsville; C. Kouveliotou and M. McCollough, Universities Space Research Association; and K. Hurley, Space Sciences Laboratory, communicate: "BATSE Earth-limb considerations limit the possible position of this object to declinations along the IPN annulus reported by Hurley et al. (below), which are between -43 deg and -49 deg. This is slightly outside the BATSE 1-sigma error circle reported on IAUC 6944. However, due to the soft spectrum of the source, systematic errors were larger than usual. A preliminary search through the MOST supernova remnant (SNR) catalogue (Whiteoak and Green 1996, A.Ap. Suppl. 118, 329) reveals only one candidate within the error box reported here, G337.0-0.1. The peculiar nonthermal-structure core reported for G337.0-0.1 is entirely within the IPN annulus width. We strongly encourage follow-up observations of the SNR source." Hurley, on behalf of the Ulysses Gamma-Ray Burst Team; and Kouveliotou, Kippen, and Woods, on behalf of the Gamma-Ray Observatory BATSE team, report: "We have obtained an IPN annulus for this soft gamma-ray repeater (IAUC 6944). Its center is at R.A. = 22h01m40s, Decl. = -10o09'.8 (equinox 2000.0), and its radius is 76.769 +/- 0.028 deg. Considerable further refinement of this position is possible. An image may be found at http://ssl.berkeley.edu/ipn3/sgr1627-41/." COMET C/1998 K2 (LINEAR) Ephemeris extension to IAUC 6915 (elements MPC 31893): 1998 TT R. A. (2000) Decl. Delta r Elong. Phase m1 June 26 15 39.63 -42 51.5 1.561 2.443 141.9 14.9 13.3 July 6 15 17.49 -45 36.6 1.630 2.411 129.8 18.9 13.4 16 14 59.58 -47 48.4 1.721 2.383 118.8 21.9 13.5 26 14 46.79 -49 39.1 1.827 2.361 108.9 24.0 13.5 Aug. 5 14 39.28 -51 20.2 1.941 2.343 100.2 25.2 13.6 15 14 36.74 -53 00.1 2.057 2.331 92.4 25.7 13.7 25 14 38.81 -54 43.7 2.171 2.324 85.7 25.7 13.8 Sept. 4 14 45.19 -56 34.1 2.281 2.323 79.7 25.3 14.0 14 14 55.76 -58 31.6 2.384 2.327 74.6 24.6 14.1 24 15 10.67 -60 35.7 2.479 2.337 70.1 23.8 14.2 Oct. 4 15 30.32 -62 44.4 2.566 2.352 66.4 22.9 14.3 Visual m_1 estimates: May 31.27 UT, 13.1 (C. S. Morris, Lockwood Valley, CA, 0.5-m reflector); June 2.64, 12.6 (M. Mattiazzo, Wallaroo, South Australia, 0.20-m reflector); 17.54, 12.7 (Mattiazzo). (C) Copyright 1998 CBAT 1998 June 19 (6948) Daniel W. E. Green