SIMBAD references

D. C. Leonard, San Diego State University; J. Moustakas, University of California at San Diego; B. J. Swift and D. McCarthy, University of Arizona; V. Bailey, E. Carrico, A. Carter, E. Chui, E. Douglas, E. Eggeman, R. Goldberg, R. Grant, K. Hartman, J. Hellerstein, E. Hooper, C. Horlick-Cruz, L. Hunter, T. Jiles, E. D. Johnson, K. Kumar, L. Lappe, J. Lee, W. Lee, F. Marsh, G. Mehta, P. Miller, R. Rampalli, J. Reed, K. Rice, H. Saldivar, M. Salgado-Flores, A. Schlingman, W. F. Schlingman, W. M. Schlingman, S. Scibelli, K. Sinclair, I. Steincamp, N. Stock, N. Todd, L. L. Aizpuru Vargas, S. Yamanaka, and E. Zachary, 2011 Advanced Teen Astronomy Camp, report that a low-dispersion optical spectrum (range 370-690 nm) of PSN J16313945+4129229 = SN 2011dw, obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Steward Observatory on June 30 UT, displays a featureless, blue continuum. Identifying a faint, unresolved emission line in the spectrum at 675.8 nm with H-alpha indicates a redshift of 0.03, in agreement with the recession velocity reported in the second Sloan Digital Sky Survey Data Release of the putative host galaxy, PGC 58436. The spectrum is reminiscent of a very young type-II/IIb supernova, although additional spectroscopy is required to confirm the nature of this event. Adopting the NASA/IPAC Extragalactic Database distance-modulus estimate of PGC 58436 of m-M = 35.5 magnitudes, that the apparent magnitude of PSN J16313945+4129229 (16.9 on June 27.3391, as reported by the discoverers, above) indicates an absolute magnitude of -18.6, which is a somewhat-greater luminosity than typical type-II/IIb supernovae achieve.