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Independent discovery and improved position of the Nova M31N 2017 11d

ATel #11031; L. Hermosa Mu\~noz, C. Arce Tord, A. Jimenez Gallardo, E. Lopez Navas, M. Rodriguez Sanchez, M. Garcia Rivas, M. Gioele Prendin, M. Hernandez Sanchez, A. Esteban Gutierrez, E. Garcia Broock, L. Gonzalez Cuesta, E. A. Mantero Casta\~neda, J. Otero Sanchez (Universidad de La Laguna, Tenerife, Spain), Ismael Perez-Fournon (Universidad de La Laguna and Instituto de Astrofisica de Canarias, Tenerife, Spain)
on 4 Dec 2017; 14:07 UT
Credential Certification: Ismael Perez-Fournon (ipf@iac.es)

Subjects: Optical, Nova

We report the independent discovery of a bright nova in M31 on CCD images taken from Nov. 11 UT 23:42:40 to Nov. 12 UT 00:03:28 with the 0.8m IAC80 telescope at Teide Observatory in Tenerife, Spain. The nova (M31N 2017 11d) was independently discovered also by Igarishi et al. (ATEL # 10955), who observed this object on Nov. 12.103 UT, after our first IAC80 observations. Spectroscopic confirmation of the Nova candidate by Shafter et al. (ATEL # 10981) and Fabrika et al. (ATEL # 10986) suggests that the Nova is of the He/N spectroscopic class although a Hybrid classification is also possible. The following AB magnitudes in the Sloan filters g, r, i, and z were obtained with the IAC80: g = 15.94 +/- 0.15, r = 15.80 +/- 0.15, i = 16.12 +/- 0.15, and z = 15.85 +/- 0.25. On the IAC80 images, calibrated using the Gaia DR1 astrometric catalog, the Nova is located at RA (J2000) = 00:42:43.32 , Dec (J2000) = 41:17:15.5. The precision of these coordinates is 0.15 arcsec. The IAC80 position is about 0.4 arcsec from the one reported by Igarishi et al. (ATEL # 10955). A finding chart in the Sloan g-band is linked below (North up, East left, ~3' on a side)

Finding chart