TY  - JOUR
AU  - Amanullah, R.
AU  - Johansson, J.
AU  - Goobar, A.
AU  - Ferretti, R.
AU  - Papadogiannakis, S.
AU  - Petrushevska, T.
AU  - Brown, P. J.
AU  - Cao, Y.
AU  - Contreras, C.
AU  - Dahle, H.
AU  - Elias-Rosa, N.
AU  - Fynbo, J. P. U.
AU  - Gorosabel, J.
AU  - Guaita, L.
AU  - Hangard, L.
AU  - Howell, D. A.
AU  - Hsiao, E. Y.
AU  - Kankare, E.
AU  - Kasliwal, M.
AU  - Leloudas, G.
AU  - Lundqvist, P.
AU  - Mattila, S.
AU  - Nugent, P.
AU  - Phillips, M. M.
AU  - Sandberg, A.
AU  - Stanishev, V.
AU  - Sullivan, M.
AU  - Taddia, F.
AU  - Ostlin, G.
AU  - Asadi, S.
AU  - Herrero-Illana, R.
AU  - Jensen, J. J.
AU  - Karhunen, K.
AU  - Lazarević, Slavica
AU  - Varenius, E.
AU  - Santos, P.
AU  - Sridhar, S. Seethapuram
AU  - Wallstrom, S. H. J.
AU  - Wiegert, J.
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3073
AB  - We present ultraviolet (UV) observations of six nearby Type Ia supernovae (SNe Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR) with Wide-Field Camera 3. UV observations with the Swift satellite, as well as ground-based optical and NIR data provide complementary information. The combined data set covers the wavelength range 0.2-2 mu m. By also including archival data of SN 2014J, we analyse a sample spanning observed colour excesses up to E(B - V) = 1.4 mag. We study the wavelength-dependent extinction of each individual SN and find a diversity of reddening laws when characterized by the total-to-selective extinction R-V. In particular, we note that for the two SNe with E(B - V) greater than or similar to 1 mag, for which the colour excess is dominated by dust extinction, we find R-V = 1.4 +/- 0.1 and R-V = 2.8 +/- 0.1. Adding UV photometry reduces the uncertainty of fitted R-V by similar to 50 per cent allowing us to also measure R-V of individual low-extinction objects which point to a similar diversity, currently not accounted for in the analyses when SNe Ia are used for studying the expansion history of the Universe.
PB  - Oxford Univ Press, Oxford
T2  - Monthly Notices of the Royal Astronomical Society
T1  - Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m
EP  - 3328
IS  - 3
SP  - 3300
VL  - 453
DO  - 10.1093/mnras/stv1505
ER  - 

@article{
author = "Amanullah, R. and Johansson, J. and Goobar, A. and Ferretti, R. and Papadogiannakis, S. and Petrushevska, T. and Brown, P. J. and Cao, Y. and Contreras, C. and Dahle, H. and Elias-Rosa, N. and Fynbo, J. P. U. and Gorosabel, J. and Guaita, L. and Hangard, L. and Howell, D. A. and Hsiao, E. Y. and Kankare, E. and Kasliwal, M. and Leloudas, G. and Lundqvist, P. and Mattila, S. and Nugent, P. and Phillips, M. M. and Sandberg, A. and Stanishev, V. and Sullivan, M. and Taddia, F. and Ostlin, G. and Asadi, S. and Herrero-Illana, R. and Jensen, J. J. and Karhunen, K. and Lazarević, Slavica and Varenius, E. and Santos, P. and Sridhar, S. Seethapuram and Wallstrom, S. H. J. and Wiegert, J.",
year = "2015",
abstract = "We present ultraviolet (UV) observations of six nearby Type Ia supernovae (SNe Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR) with Wide-Field Camera 3. UV observations with the Swift satellite, as well as ground-based optical and NIR data provide complementary information. The combined data set covers the wavelength range 0.2-2 mu m. By also including archival data of SN 2014J, we analyse a sample spanning observed colour excesses up to E(B - V) = 1.4 mag. We study the wavelength-dependent extinction of each individual SN and find a diversity of reddening laws when characterized by the total-to-selective extinction R-V. In particular, we note that for the two SNe with E(B - V) greater than or similar to 1 mag, for which the colour excess is dominated by dust extinction, we find R-V = 1.4 +/- 0.1 and R-V = 2.8 +/- 0.1. Adding UV photometry reduces the uncertainty of fitted R-V by similar to 50 per cent allowing us to also measure R-V of individual low-extinction objects which point to a similar diversity, currently not accounted for in the analyses when SNe Ia are used for studying the expansion history of the Universe.",
publisher = "Oxford Univ Press, Oxford",
journal = "Monthly Notices of the Royal Astronomical Society",
title = "Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m",
pages = "3328-3300",
number = "3",
volume = "453",
doi = "10.1093/mnras/stv1505"
}

Amanullah, R., Johansson, J., Goobar, A., Ferretti, R., Papadogiannakis, S., Petrushevska, T., Brown, P. J., Cao, Y., Contreras, C., Dahle, H., Elias-Rosa, N., Fynbo, J. P. U., Gorosabel, J., Guaita, L., Hangard, L., Howell, D. A., Hsiao, E. Y., Kankare, E., Kasliwal, M., Leloudas, G., Lundqvist, P., Mattila, S., Nugent, P., Phillips, M. M., Sandberg, A., Stanishev, V., Sullivan, M., Taddia, F., Ostlin, G., Asadi, S., Herrero-Illana, R., Jensen, J. J., Karhunen, K., Lazarević, S., Varenius, E., Santos, P., Sridhar, S. S., Wallstrom, S. H. J.,& Wiegert, J.. (2015). Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m. in Monthly Notices of the Royal Astronomical Society
Oxford Univ Press, Oxford., 453(3), 3300-3328.
https://doi.org/10.1093/mnras/stv1505

Amanullah R, Johansson J, Goobar A, Ferretti R, Papadogiannakis S, Petrushevska T, Brown PJ, Cao Y, Contreras C, Dahle H, Elias-Rosa N, Fynbo JPU, Gorosabel J, Guaita L, Hangard L, Howell DA, Hsiao EY, Kankare E, Kasliwal M, Leloudas G, Lundqvist P, Mattila S, Nugent P, Phillips MM, Sandberg A, Stanishev V, Sullivan M, Taddia F, Ostlin G, Asadi S, Herrero-Illana R, Jensen JJ, Karhunen K, Lazarević S, Varenius E, Santos P, Sridhar SS, Wallstrom SHJ, Wiegert J. Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m. in Monthly Notices of the Royal Astronomical Society. 2015;453(3):3300-3328.
doi:10.1093/mnras/stv1505 .

Amanullah, R., Johansson, J., Goobar, A., Ferretti, R., Papadogiannakis, S., Petrushevska, T., Brown, P. J., Cao, Y., Contreras, C., Dahle, H., Elias-Rosa, N., Fynbo, J. P. U., Gorosabel, J., Guaita, L., Hangard, L., Howell, D. A., Hsiao, E. Y., Kankare, E., Kasliwal, M., Leloudas, G., Lundqvist, P., Mattila, S., Nugent, P., Phillips, M. M., Sandberg, A., Stanishev, V., Sullivan, M., Taddia, F., Ostlin, G., Asadi, S., Herrero-Illana, R., Jensen, J. J., Karhunen, K., Lazarević, Slavica, Varenius, E., Santos, P., Sridhar, S. Seethapuram, Wallstrom, S. H. J., Wiegert, J., "Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2 mu m" in Monthly Notices of the Royal Astronomical Society, 453, no. 3 (2015):3300-3328,
https://doi.org/10.1093/mnras/stv1505 . .