Early Spectroscopic Identification of SN 2008D

D. Malesani; J. P. U. Fynbo; J. Hjorth; G. Leloudas; J. Sollerman; M. D. Stritzinger; P. M. Vreeswijk; D. J. Watson; J. Gorosabel; Michal Michalowski; C. C. Thöne; T. Augusteijn; D. Bersier; P. Jakobsson; A. O. Jaunsen; C. Ledoux; A. J. Levan; B. Milvang-Jensen; E. Rol; N. R. Tanvir; K. Wiersema; D. Xu; L. Albert; M. Bayliss; C. Gall; L. F. Grove; B. P. Koester; E. Leitet; T. Pursimo; I. Skillen

doi:10.1088/0004-637X/692/2/L84

Early Spectroscopic Identification of SN 2008D

D. Malesani, J. P. U. Fynbo, J. Hjorth, G. Leloudas, J. Sollerman, M. D. Stritzinger, P. M. Vreeswijk, D. J. Watson, J. Gorosabel, Michal Michalowski, C. C. Thöne, T. Augusteijn, D. Bersier, P. Jakobsson, A. O. Jaunsen, C. Ledoux, A. J. Levan, B. Milvang-Jensen, E. Rol, N. R. TanvirK. Wiersema, D. Xu, L. Albert, M. Bayliss, C. Gall, L. F. Grove, B. P. Koester, E. Leitet, T. Pursimo, I. Skillen

School of Physics and Astronomy

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Abstract / Description of output

SN 2008D was discovered while following up an unusually bright X-ray transient (XT) in the nearby spiral galaxy NGC 2770. We present early optical spectra (obtained 1.75 days after the XT) which allowed the first identification of the object as a supernova (SN) at redshift z = 0.007. These spectra were acquired during the initial declining phase of the light curve, likely produced in the stellar envelope cooling after shock breakout, and rarely observed. They exhibit a rather flat spectral energy distribution with broad undulations, and a strong, W-shaped feature with minima at 3980 and 4190 Å (rest frame). We also present extensive spectroscopy and photometry of the SN during the subsequent photospheric phase. Unlike SNe associated with gamma-ray bursts, SN 2008D displayed prominent He features and is therefore of Type Ib. Partly based on observations made with ESO telescopes at the La Silla Paranal Observatory under program 080.D-0526, with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, and with the United Kingdom Infrared Telescope, which is operated by the Joint Astronomy Centre on behalf of the Science and Technology Council of the UK.

Original language	English
Journal	Astrophysical Journal Letters
Volume	692
DOIs	https://doi.org/10.1088/0004-637X/692/2/L84
Publication status	Published - 1 Feb 2009

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10.1088/0004-637X/692/2/L84

http://adsabs.harvard.edu/abs/2009ApJ...692L..84M

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Malesani, D., Fynbo, J. P. U., Hjorth, J., Leloudas, G., Sollerman, J., Stritzinger, M. D., Vreeswijk, P. M., Watson, D. J., Gorosabel, J., Michalowski, M., Thöne, C. C., Augusteijn, T., Bersier, D., Jakobsson, P., Jaunsen, A. O., Ledoux, C., Levan, A. J., Milvang-Jensen, B., Rol, E., ... Skillen, I. (2009). Early Spectroscopic Identification of SN 2008D. Astrophysical Journal Letters, 692. https://doi.org/10.1088/0004-637X/692/2/L84

@article{ccb3dcf9b43c4ae8b735a9c39b29343a,

title = "Early Spectroscopic Identification of SN 2008D",

abstract = "SN 2008D was discovered while following up an unusually bright X-ray transient (XT) in the nearby spiral galaxy NGC 2770. We present early optical spectra (obtained 1.75 days after the XT) which allowed the first identification of the object as a supernova (SN) at redshift z = 0.007. These spectra were acquired during the initial declining phase of the light curve, likely produced in the stellar envelope cooling after shock breakout, and rarely observed. They exhibit a rather flat spectral energy distribution with broad undulations, and a strong, W-shaped feature with minima at 3980 and 4190 {\AA} (rest frame). We also present extensive spectroscopy and photometry of the SN during the subsequent photospheric phase. Unlike SNe associated with gamma-ray bursts, SN 2008D displayed prominent He features and is therefore of Type Ib. Partly based on observations made with ESO telescopes at the La Silla Paranal Observatory under program 080.D-0526, with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, and with the United Kingdom Infrared Telescope, which is operated by the Joint Astronomy Centre on behalf of the Science and Technology Council of the UK.",

author = "D. Malesani and Fynbo, {J. P. U.} and J. Hjorth and G. Leloudas and J. Sollerman and Stritzinger, {M. D.} and Vreeswijk, {P. M.} and Watson, {D. J.} and J. Gorosabel and Michal Michalowski and Th{\"o}ne, {C. C.} and T. Augusteijn and D. Bersier and P. Jakobsson and Jaunsen, {A. O.} and C. Ledoux and Levan, {A. J.} and B. Milvang-Jensen and E. Rol and Tanvir, {N. R.} and K. Wiersema and D. Xu and L. Albert and M. Bayliss and C. Gall and Grove, {L. F.} and Koester, {B. P.} and E. Leitet and T. Pursimo and I. Skillen",

year = "2009",

month = feb,

day = "1",

doi = "10.1088/0004-637X/692/2/L84",

language = "English",

volume = "692",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing",

}

Malesani, D, Fynbo, JPU, Hjorth, J, Leloudas, G, Sollerman, J, Stritzinger, MD, Vreeswijk, PM, Watson, DJ, Gorosabel, J, Michalowski, M, Thöne, CC, Augusteijn, T, Bersier, D, Jakobsson, P, Jaunsen, AO, Ledoux, C, Levan, AJ, Milvang-Jensen, B, Rol, E, Tanvir, NR, Wiersema, K, Xu, D, Albert, L, Bayliss, M, Gall, C, Grove, LF, Koester, BP, Leitet, E, Pursimo, T & Skillen, I 2009, 'Early Spectroscopic Identification of SN 2008D', Astrophysical Journal Letters, vol. 692. https://doi.org/10.1088/0004-637X/692/2/L84

TY - JOUR

T1 - Early Spectroscopic Identification of SN 2008D

AU - Malesani, D.

AU - Fynbo, J. P. U.

AU - Hjorth, J.

AU - Leloudas, G.

AU - Sollerman, J.

AU - Stritzinger, M. D.

AU - Vreeswijk, P. M.

AU - Watson, D. J.

AU - Gorosabel, J.

AU - Michalowski, Michal

AU - Thöne, C. C.

AU - Augusteijn, T.

AU - Bersier, D.

AU - Jakobsson, P.

AU - Jaunsen, A. O.

AU - Ledoux, C.

AU - Levan, A. J.

AU - Milvang-Jensen, B.

AU - Rol, E.

AU - Tanvir, N. R.

AU - Wiersema, K.

AU - Xu, D.

AU - Albert, L.

AU - Bayliss, M.

AU - Gall, C.

AU - Grove, L. F.

AU - Koester, B. P.

AU - Leitet, E.

AU - Pursimo, T.

AU - Skillen, I.

PY - 2009/2/1

Y1 - 2009/2/1

N2 - SN 2008D was discovered while following up an unusually bright X-ray transient (XT) in the nearby spiral galaxy NGC 2770. We present early optical spectra (obtained 1.75 days after the XT) which allowed the first identification of the object as a supernova (SN) at redshift z = 0.007. These spectra were acquired during the initial declining phase of the light curve, likely produced in the stellar envelope cooling after shock breakout, and rarely observed. They exhibit a rather flat spectral energy distribution with broad undulations, and a strong, W-shaped feature with minima at 3980 and 4190 Å (rest frame). We also present extensive spectroscopy and photometry of the SN during the subsequent photospheric phase. Unlike SNe associated with gamma-ray bursts, SN 2008D displayed prominent He features and is therefore of Type Ib. Partly based on observations made with ESO telescopes at the La Silla Paranal Observatory under program 080.D-0526, with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, and with the United Kingdom Infrared Telescope, which is operated by the Joint Astronomy Centre on behalf of the Science and Technology Council of the UK.

AB - SN 2008D was discovered while following up an unusually bright X-ray transient (XT) in the nearby spiral galaxy NGC 2770. We present early optical spectra (obtained 1.75 days after the XT) which allowed the first identification of the object as a supernova (SN) at redshift z = 0.007. These spectra were acquired during the initial declining phase of the light curve, likely produced in the stellar envelope cooling after shock breakout, and rarely observed. They exhibit a rather flat spectral energy distribution with broad undulations, and a strong, W-shaped feature with minima at 3980 and 4190 Å (rest frame). We also present extensive spectroscopy and photometry of the SN during the subsequent photospheric phase. Unlike SNe associated with gamma-ray bursts, SN 2008D displayed prominent He features and is therefore of Type Ib. Partly based on observations made with ESO telescopes at the La Silla Paranal Observatory under program 080.D-0526, with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, and with the United Kingdom Infrared Telescope, which is operated by the Joint Astronomy Centre on behalf of the Science and Technology Council of the UK.

U2 - 10.1088/0004-637X/692/2/L84

DO - 10.1088/0004-637X/692/2/L84

M3 - Article

SN - 2041-8205

VL - 692

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

ER -

Early Spectroscopic Identification of SN 2008D

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