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Title: The Young And Bright Type Ia Supernova Asassn-141p: Discovery, Early-time Observations, First-light Time, Distance To Ngc 4666, And Progenitor Constraints.
Name(s): Shappee, B. J., author
Piro, A. L., author
Holoien, T. W.-S., author
Prieto, J. L., author
Contreras, C., author
Itagaki, K., author
Burns, C. R., author
Kochanek, C. S., author
Stanek, K. Z., author
Alper, E., author
Basu, U., author
Beacom, J. F., author
Bersier, D., author
Brimacombe, J., author
Conseil, E., author
Danilet, A. B., author
Dong, Subo, author
Falco, E., author
Grupe, D., author
Hsiao, E. Y., author
Kiyota, S., author
Morrell, N., author
Nicolas, J., author
Phillips, M. M., author
Pojmanski, G., author
Simonian, G., author
Stritzinger, M., author
Szczygiel, D. M., author
Taddia, F., author
Thompson, T. A., author
Thorstensen, J., author
Wagner, M. R., author
Wozniak, P. R., author
Type of Resource: text
Genre: Text
Date Issued: 2016-08-01
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: On 2014 December 9.61, the All-sky Automated Survey for SuperNovae (ASAS-SN or "Assassin") discovered ASASSN-141p just similar to 2 days after first light using a global array of 14 cm diameter telescopes. ASASSN-141p went on to become a bright supernova (V = 11.94 mag), second only to SN 2014J for the year. We present prediscovery photometry (with a detection less than a day after first light) and ultraviolet through near-infrared photometric and spectroscopic data covering the rise and fall of ASASSN-141p for more than 100 days. We find that ASASSN-141p had a broad light curve (Delta m(15) (B) = 0.80 +/- 0.05), a B-band maximum at 2457015.82 +/- 0.03, a rise time of 16.941(-0.10)(+0.11) days, and moderate host-galaxy extinction (E (B - V)host = 0.33 +/- 0.06). Using ASASSN-141p, we derive a distance modulus for NGC 4666 of mu = 30.8 +/- 0.2, corresponding to a distance of 14.7 +/- 1.5 Mpc. However, adding ASASSN-141p to the calibrating sample of Type Ia supernovae still requires an independent distance to the host galaxy. Finally, using our early-time photometric and spectroscopic observations, we rule out red giant secondaries and, assuming a favorable viewing angle and explosion time, any nondegenerate companion larger than 0.34 RG(circle dot).
Identifier: FSU_libsubv1_wos_000381977900044 (IID), 10.3847/0004-637x/826/2/144 (DOI)
Keywords: Galaxies: distances and redshifts, high-redshift supernovae, hubble-space-telescope, image subtraction, light curves, photometry data release, rise-time, sn 2011fe, supernovae: individual (ASASSN-141p, Type Ia, NGC 4666, ASASSN-141p), swift ultraviolet/optical telescope, white-dwarf, white dwarfs, x-ray telescope
Publication Note: The publisher’s version of record is available at
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Host Institution: FSU
Is Part Of: Astrophysical Journal.
Issue: iss. 2, vol. 826

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Shappee, B. J., Piro, A. L., Holoien, T. W. -S., Prieto, J. L., Contreras, C., Itagaki, K., … Wozniak, P. R. (2016). The Young And Bright Type Ia Supernova Asassn-141p: Discovery, Early-time Observations, First-light Time, Distance To Ngc 4666, And Progenitor Constraints. Astrophysical Journal. Retrieved from