Central Bureau for Astronomical Telegrams
IAUC 7860: 2002ap; C/2002 E2
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Circular No. 7860
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://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2002ap IN M74
G. H. Marion, P. Hoeflich, and J. C. Wheeler, University of
Texas at Austin; and W. Vacca, Max-Planck-Institut fuer
Extraterrestrische Physik, report on near-infrared spectroscopy of
SN 2002ap: "The spectrum (range 0.80-2.5 microns, resolution 1200)
was obtained on Mar. 8.3 UT using the NASA Infrared Telescope
Facility (+ SpeX). We see no evidence for Paschen lines or
Brackett gamma. We confirm the presence of a P-Cyg feature with a
minimum at 1.03 microns (IAUC 7834, 7838), which could be
attributed to He I (1.083 microns) or Mg II (1.0914, 1.0915, and
1.0950 microns). However, the He identification is not favored
because we find no detection of He I at 2.058 microns, while there
is a strong presence of other Mg features in the spectrum. Mg II
is found at 2.13 and 1.58 microns, in blends with Si II. Mg I is
prominent at 1.50 microns, and the wide absorption trough at 0.93-
1.03 microns is plausibly a combination of Mg I, C I, and Mg II.
Ca II is identified in P-Cyg features with absorption minima at
0.81 micron and (possibly blended with Mg I) at 1.16 microns. We
also detect emission or P-Cyg features that are identified with C I
at 0.91 micron, Si II at 1.29 microns, O I at 1.11 microns, and O I
blended with Si II at 1.22 microns."
COMET C/2002 E2 (SNYDER-MURAKAMI)
Ephemeris extension to IAUC 7852 (elements MPC 2002-F56):
2002 TT R. A. (2000) Decl. Delta r Elong. Phase m1
Mar. 27 19 10.88 +15 57.3 1.404 1.540 77.7 39.3 10.1
Apr. 1 19 15.14 +21 59.8 1.380 1.563 80.4 39.1 10.1
6 19 18.89 +28 11.5 1.368 1.588 82.6 38.7 10.2
11 19 22.02 +34 25.1 1.369 1.616 84.4 38.1 10.3
16 19 24.41 +40 32.9 1.383 1.646 85.7 37.4 10.4
21 19 25.85 +46 27.5 1.410 1.678 86.4 36.7 10.5
26 19 26.12 +52 02.7 1.449 1.713 86.5 35.9 10.6
May 1 19 24.88 +57 14.3 1.498 1.749 86.2 35.1 10.8
6 19 21.67 +61 59.4 1.555 1.787 85.5 34.3 11.0
11 19 15.81 +66 16.6 1.621 1.826 84.5 33.4 11.2
16 19 06.4 +70 05.0 1.692 1.867 83.3 32.5 11.4
Visual m_1 estimates: Mar. 15.10 UT, 10.3 (B. H. Granslo,
Eina, Norway, 0.25-m reflector); 17.09, 10.1 (A. Baransky, Kiev,
Ukraine, 0.36-m reflector); 21.86, 10.9 (A. Pearce, Nedlands, W.
Australia, 0.41-m reflector); 23.11, 9.9 (K. Hornoch, Lelekovice,
Czech Republic, 0.13-m reflector).
(C) Copyright 2002 CBAT
2002 March 25 (7860) Daniel W. E. Green
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