[Iaude] CBET 5135: V415 MUSCAE = NOVA MUSCAE 2022

quai at eps.harvard.edu quai at eps.harvard.edu
Wed Jun 15 23:25:11 EDT 2022

                                                  Electronic Telegram No. 5135
Central Bureau for Astronomical Telegrams
Mailing address:  Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau at eps.harvard.edu (alternate cbat at iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network

     The Central Bureau has been informed of the discovery of a nova (at Sloan
g magnitude 9.5) by the All-Sky Automated Survey for Supernovae (reported by
K. Z. Stanek for the ASAS-SN team, according to E. O. Waagen, AAVSO) on an
image obtained on June 10.13 UT.  The variable is located at R.A. =
13h24m31s.30, Decl. = -72d10'30".3 (equinox J2000.0).  Waagen notes that P.
Schmeer finds that pre-discovery ASAS-SN data show that the nova had reached
its maximum magnitude of 8.7 (g) on 2022 June 8.  A. Pearce, Nedlands, W.
Australia, writes that he obtained a confirming CCD image of the nova on June
10.935 with a 200-mm ASA H8 Hyperbolic telescope (+ luminence filter) at the
Skygems Observatory in Namibia, measuring magnitude 9.8 and position end
figures 31s.31, 30".3.  Follow-up images obtained remotely by E. Guido, M.
Rocchetto, and A. Valvasori with a "Telescope Live" 0.6-m f/6.5 astrograph
at El Sauce, Chile, on June 11.06 show the nova at R mag about 8.1 with
position end figures 31s.34, 30".2 (Gaia DR2 catalogue reference stars for
the astrometry); their image compared to a Palomar Sky Survey plate from
1999 Feb. 13 can be viewed at website URL https://tinyurl.com/novamusca2.
     Visual magnitude estimates reported to the Central Bureau for N Mus 2022:
June 10.978 UT, 9.9 (A. Amorim, Florianopolis, Brazil, 9-cm refractor);
11.923, 10.2 (Amorim); 12.08, 10.4 (J. G. de S. Aguiar, Campinas, Brazil,
0.27-m reflector; clouds; moonlight); 12.901, 10.4 (Amorim); 13.905, 10.8
(Amorim); 14.02, 10.5 (Aguiar; moonlight); 15.01, 10.5 (Aguiar; moonlight).
     Selected photometric magnitudes supplied by Waagen:  June 11.035 UT, I =
8.03 (F.-J. Hambsch, Mol, Belgium, remotely from Atacama, Chile); 11.036, R =
8.57 (Hambsch); 11.066, B = 10.34 (E. Gomez, Sylva, NC, USA); 11.067, V =
9.81 (Gomez); 12.032, I = 8.32 (Hambsch); 12.032, V = 10.14 (Hambsch); 12.033,
B = 10.30 (Hambsch); 12.033, R = 8.71 (Hambsch); 14.027, I = 8.80 (Hambsch);
14.027, V = 10.52 (Hambsch); 14.027, B = 10.53 (Hambsch); 14.028, R = 9.00
(Hambsch).  Additional observations appear on AAVSO Alert Notice 781.
     Waagen adds that spectroscopy indicating the object to be a nova was
obtained on June 11.423 UT by H. Barker (Nelson, New Zealand) with 20-cm
Newtonian reflector (+ and L200 Littrow spectrograph with a 180-lines/mm
grating; cf. website URL https://www.wis-tns.org/object/2022mmp).
     E. Kazarovets writes that the permanent GCVS designation V415 Mus has
been assigned to this nova.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2022 CBAT
2022 June 16                     (CBET 5135)              Daniel W. E. Green

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