K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova

Dimitriadis, G.; Foley, R. J.; Rest, A.; Kasen, D.; Piro, A. L.; Polin, A.; Jones, D. O.; Villar, A.; Narayan, G.; A. Coulter, D.; Kilpatrick, C. D.; Pan, Y. -C.; Rojas-Bravo, C.; Fox, O. D.; Jha, S. W.; Nugent, P. E.; Riess, A. G.; Scolnic, D.; Drout, M. R.; Barentsen, G.; Dotson, J.; Gully-Santiago, M.; Hedges, C.; Cody, A. M.; Barclay, T.; Howell, S.; Garnavich, P.; Tucker, B. E.; Shaya, E.; Mushotzky, R.; Olling, R. P.; Margheim, S.; Zenteno, A.; Coughlin, J.; Cleve, J. E.  Van; de Miranda Cardoso, J. Vinícius; Larson, K. A.; McCalmont-Everton, K. M.; Peterson, C. A.; Ross, S. E.; Reedy, L. H.; Osborne, D.; McGinn, C.; Kohnert, L.; Migliorini, L.; Wheaton, A.; Spencer, B.; Labonde, C.; Castillo, G.; Beerman, G.; Steward, K.; Hanley, M.; Larsen, R.; Gangopadhyay, R.; Kloetzel, R.; Weschler, T.; Nystrom, V.; Moffatt, J.; Redick, M.; Griest, K.; Packard, M.; Muszynski, M.; Kampmeier, J.; Bjella, R.; Flynn, S.; Elsaesser, B.; Chambers, K. C.; Flewelling, H. A.; Huber, M. E.; Magnier, E. A.; Waters, C. Z.; Schultz, A. S.  B.; Bulger, J.; Lowe, T. B.; Willman, M.; Smartt, S. J.; Smith, K. W.; Points, S.; Strampelli, G. M.; Brimacombe, J.; Chen, P.; Muñoz, J. A.; Mutel, R. L.; Shields, J.; Vallely, P. J.; Villanueva, S.; Li, W.; Wang, X.; Zhang, J.; Lin, H.; Mo, J.; Zhao, X.; Sai, H.; Zhang, X.; Zhang, K.; Zhang, T.; Wang, L.; Zhang, J.; Baron, E.; DerKacy, J. M.; Li, L.; Chen, Z.; Xiang, D.; Rui, L.; Wang, L.; Huang, F.; Li, X.; Hosseinzadeh, G.; Howell, D. A.; Arcavi, I.; Hiramatsu, D.; Burke, J.; Valenti, S.; Tonry, J. L.; Denneau, L.; Heinze, A. N.; Weiland, H.; Stalder, B.; Vinkó, J.; Sárneczky, K.; Pál, A.; Bódi, A.; Bognár, Zs.; Csák, B.; Cseh, B.; Csörnyei, G.; Hanyecz, O.; Ignácz, B.; Kalup, Cs.; Könyves-Tóth, R.; Kriskovics, L.; Ordasi, A.; Rajmon, I.; Sódor, A.; Szabó, R.; Szakáts, R.; Zsidi, G.; Williams, S. C.; Nordin, J.; Cartier, R.; Frohmaier, C.; Galbany, L.; Gutiérrez, C. P.; Hook, I.; Inserra, C.; Smith, M.; Sand, D. J.; Andrews, J. E.; Smith, N.; Bilinski, C.

doi:10.3847/2041-8213/aaedb0

Title: K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova

Abstract

We present an exquisite 30 minute cadence Kepler (K2) light curve of the Type Ia supernova (SN Ia) 2018oh (ASASSN-18bt), starting weeks before explosion, covering the moment of explosion and the subsequent rise, and continuing past peak brightness. These data are supplemented by multi-color Panoramic Survey Telescope (Pan-STARRS1) and Rapid Response System 1 and Cerro Tololo Inter-American Observatory 4 m Dark Energy Camera (CTIO 4-m DECam) observations obtained within hours of explosion. The K2 light curve has an unusual two-component shape, where the flux rises with a steep linear gradient for the first few days, followed by a quadratic rise as seen for typical supernovae (SNe) Ia. This "flux excess" relative to canonical SN Ia behavior is confirmed in our i-band light curve, and furthermore, SN 2018oh is especially blue during the early epochs. The flux excess peaks 2.14 ± 0.04 days after explosion, has a FWHM of 3.12 ± 0.04 days, a blackbody temperature of $$T = 17,500^{+11,500}_{-9,000}$$ K, a peak luminosity of 4.3 ± 0.2 x 10³⁸ erg s^-1, and a total integrated energy of 1.27 ± 0.01 x 10⁴³ erg. We compare SN 2018oh to several models that may provide additional heating at early times, including collision with a companion and a shallow concentration of radioactive nickel. While all of these models generally reproduce the early K2 light curve shape, we slightly favor a companion interaction, at a distance of ~ 2 x 10¹² based on our early color measurements, although the exact distance depends on the uncertain viewing angle. Additional confirmation of a companion interaction in future modeling and observations of SN 2018oh would provide strong support for a single-degenerate progenitor system.

Authors:

Dimitriadis, G.; Foley, R. J.; Rest, A.; Kasen, D.;

; Polin, A.;

;

; Pan, Y. -C.; Rojas-Bravo, C.;

;

; Riess, A. G.; Scolnic, D.; Drout, M. R.;

Publication Date:: Fri Dec 28 00:00:00 EST 2018

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

Contributing Org.:: K2 Mission Team; KEGS; Kepler spacecraft team; Pan-STARRS; DECam; ASAS-SN; PTSS/TNTS; Las Cumbres Observatory; ATLAS; Konkoly; ePESSTO; University of Arizona

OSTI Identifier:: 1526567

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: The Astrophysical Journal. Letters (Online)

Additional Journal Information:: Journal Name: The Astrophysical Journal. Letters (Online); Journal Volume: 870; Journal Issue: 1; Journal ID: ISSN 2041-8213

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats


                    Dimitriadis, G., Foley, R. J., Rest, A., Kasen, D., Piro, A. L., Polin, A., Jones, D. O., Villar, A., Narayan, G., A. Coulter, D., Kilpatrick, C. D., Pan, Y. -C., Rojas-Bravo, C., Fox, O. D., Jha, S. W., Nugent, P. E., Riess, A. G., Scolnic, D., Drout, M. R., Barentsen, G., Dotson, J., Gully-Santiago, M., Hedges, C., Cody, A. M., Barclay, T., Howell, S., Garnavich, P., Tucker, B. E., Shaya, E., Mushotzky, R., Olling, R. P., Margheim, S., Zenteno, A., Coughlin, J., Cleve, J. E.  Van, de Miranda Cardoso, J. Vinícius, Larson, K. A., McCalmont-Everton, K. M., Peterson, C. A., Ross, S. E., Reedy, L. H., Osborne, D., McGinn, C., Kohnert, L., Migliorini, L., Wheaton, A., Spencer, B., Labonde, C., Castillo, G., Beerman, G., Steward, K., Hanley, M., Larsen, R., Gangopadhyay, R., Kloetzel, R., Weschler, T., Nystrom, V., Moffatt, J., Redick, M., Griest, K., Packard, M., Muszynski, M., Kampmeier, J., Bjella, R., Flynn, S., Elsaesser, B., Chambers, K. C., Flewelling, H. A., Huber, M. E., Magnier, E. A., Waters, C. Z., Schultz, A. S.  B., Bulger, J., Lowe, T. B., Willman, M., Smartt, S. J., Smith, K. W., Points, S., Strampelli, G. M., Brimacombe, J., Chen, P., Muñoz, J. A., Mutel, R. L., Shields, J., Vallely, P. J., Villanueva, S., Li, W., Wang, X., Zhang, J., Lin, H., Mo, J., Zhao, X., Sai, H., Zhang, X., Zhang, K., Zhang, T., Wang, L., Zhang, J., Baron, E., DerKacy, J. M., Li, L., Chen, Z., Xiang, D., Rui, L., Wang, L., Huang, F., Li, X., Hosseinzadeh, G., Howell, D. A., Arcavi, I., Hiramatsu, D., Burke, J., Valenti, S., Tonry, J. L., Denneau, L., Heinze, A. N., Weiland, H., Stalder, B., Vinkó, J., Sárneczky, K., Pál, A., Bódi, A., Bognár, Zs., Csák, B., Cseh, B., Csörnyei, G., Hanyecz, O., Ignácz, B., Kalup, Cs., Könyves-Tóth, R., Kriskovics, L., Ordasi, A., Rajmon, I., Sódor, A., Szabó, R., Szakáts, R., Zsidi, G., Williams, S. C., Nordin, J., Cartier, R., Frohmaier, C., Galbany, L., Gutiérrez, C. P., Hook, I., Inserra, C., Smith, M., Sand, D. J., Andrews, J. E., Smith, N., and Bilinski, C. K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova.  United States: N. p., 2018. 
Web.  doi:10.3847/2041-8213/aaedb0.

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                    Dimitriadis, G., Foley, R. J., Rest, A., Kasen, D., Piro, A. L., Polin, A., Jones, D. O., Villar, A., Narayan, G., A. Coulter, D., Kilpatrick, C. D., Pan, Y. -C., Rojas-Bravo, C., Fox, O. D., Jha, S. W., Nugent, P. E., Riess, A. G., Scolnic, D., Drout, M. R., Barentsen, G., Dotson, J., Gully-Santiago, M., Hedges, C., Cody, A. M., Barclay, T., Howell, S., Garnavich, P., Tucker, B. E., Shaya, E., Mushotzky, R., Olling, R. P., Margheim, S., Zenteno, A., Coughlin, J., Cleve, J. E.  Van, de Miranda Cardoso, J. Vinícius, Larson, K. A., McCalmont-Everton, K. M., Peterson, C. A., Ross, S. E., Reedy, L. H., Osborne, D., McGinn, C., Kohnert, L., Migliorini, L., Wheaton, A., Spencer, B., Labonde, C., Castillo, G., Beerman, G., Steward, K., Hanley, M., Larsen, R., Gangopadhyay, R., Kloetzel, R., Weschler, T., Nystrom, V., Moffatt, J., Redick, M., Griest, K., Packard, M., Muszynski, M., Kampmeier, J., Bjella, R., Flynn, S., Elsaesser, B., Chambers, K. C., Flewelling, H. A., Huber, M. E., Magnier, E. A., Waters, C. Z., Schultz, A. S.  B., Bulger, J., Lowe, T. B., Willman, M., Smartt, S. J., Smith, K. W., Points, S., Strampelli, G. M., Brimacombe, J., Chen, P., Muñoz, J. A., Mutel, R. L., Shields, J., Vallely, P. J., Villanueva, S., Li, W., Wang, X., Zhang, J., Lin, H., Mo, J., Zhao, X., Sai, H., Zhang, X., Zhang, K., Zhang, T., Wang, L., Zhang, J., Baron, E., DerKacy, J. M., Li, L., Chen, Z., Xiang, D., Rui, L., Wang, L., Huang, F., Li, X., Hosseinzadeh, G., Howell, D. A., Arcavi, I., Hiramatsu, D., Burke, J., Valenti, S., Tonry, J. L., Denneau, L., Heinze, A. N., Weiland, H., Stalder, B., Vinkó, J., Sárneczky, K., Pál, A., Bódi, A., Bognár, Zs., Csák, B., Cseh, B., Csörnyei, G., Hanyecz, O., Ignácz, B., Kalup, Cs., Könyves-Tóth, R., Kriskovics, L., Ordasi, A., Rajmon, I., Sódor, A., Szabó, R., Szakáts, R., Zsidi, G., Williams, S. C., Nordin, J., Cartier, R., Frohmaier, C., Galbany, L., Gutiérrez, C. P., Hook, I., Inserra, C., Smith, M., Sand, D. J., Andrews, J. E., Smith, N., & Bilinski, C. K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova.  United States.  https://doi.org/10.3847/2041-8213/aaedb0

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                    Dimitriadis, G., Foley, R. J., Rest, A., Kasen, D., Piro, A. L., Polin, A., Jones, D. O., Villar, A., Narayan, G., A. Coulter, D., Kilpatrick, C. D., Pan, Y. -C., Rojas-Bravo, C., Fox, O. D., Jha, S. W., Nugent, P. E., Riess, A. G., Scolnic, D., Drout, M. R., Barentsen, G., Dotson, J., Gully-Santiago, M., Hedges, C., Cody, A. M., Barclay, T., Howell, S., Garnavich, P., Tucker, B. E., Shaya, E., Mushotzky, R., Olling, R. P., Margheim, S., Zenteno, A., Coughlin, J., Cleve, J. E.  Van, de Miranda Cardoso, J. Vinícius, Larson, K. A., McCalmont-Everton, K. M., Peterson, C. A., Ross, S. E., Reedy, L. H., Osborne, D., McGinn, C., Kohnert, L., Migliorini, L., Wheaton, A., Spencer, B., Labonde, C., Castillo, G., Beerman, G., Steward, K., Hanley, M., Larsen, R., Gangopadhyay, R., Kloetzel, R., Weschler, T., Nystrom, V., Moffatt, J., Redick, M., Griest, K., Packard, M., Muszynski, M., Kampmeier, J., Bjella, R., Flynn, S., Elsaesser, B., Chambers, K. C., Flewelling, H. A., Huber, M. E., Magnier, E. A., Waters, C. Z., Schultz, A. S.  B., Bulger, J., Lowe, T. B., Willman, M., Smartt, S. J., Smith, K. W., Points, S., Strampelli, G. M., Brimacombe, J., Chen, P., Muñoz, J. A., Mutel, R. L., Shields, J., Vallely, P. J., Villanueva, S., Li, W., Wang, X., Zhang, J., Lin, H., Mo, J., Zhao, X., Sai, H., Zhang, X., Zhang, K., Zhang, T., Wang, L., Zhang, J., Baron, E., DerKacy, J. M., Li, L., Chen, Z., Xiang, D., Rui, L., Wang, L., Huang, F., Li, X., Hosseinzadeh, G., Howell, D. A., Arcavi, I., Hiramatsu, D., Burke, J., Valenti, S., Tonry, J. L., Denneau, L., Heinze, A. N., Weiland, H., Stalder, B., Vinkó, J., Sárneczky, K., Pál, A., Bódi, A., Bognár, Zs., Csák, B., Cseh, B., Csörnyei, G., Hanyecz, O., Ignácz, B., Kalup, Cs., Könyves-Tóth, R., Kriskovics, L., Ordasi, A., Rajmon, I., Sódor, A., Szabó, R., Szakáts, R., Zsidi, G., Williams, S. C., Nordin, J., Cartier, R., Frohmaier, C., Galbany, L., Gutiérrez, C. P., Hook, I., Inserra, C., Smith, M., Sand, D. J., Andrews, J. E., Smith, N., and Bilinski, C. Fri .  
"K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova".  United States.  https://doi.org/10.3847/2041-8213/aaedb0.  https://www.osti.gov/servlets/purl/1526567.

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@article{osti_1526567,

  title        = {K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova},

  author       = {Dimitriadis, G. and Foley, R. J. and Rest, A. and Kasen, D. and Piro, A. L. and Polin, A. and Jones, D. O. and Villar, A. and Narayan, G. and A. Coulter, D. and Kilpatrick, C. D. and Pan, Y. -C. and Rojas-Bravo, C. and Fox, O. D. and Jha, S. W. and Nugent, P. E. and Riess, A. G. and Scolnic, D. and Drout, M. R. and Barentsen, G. and Dotson, J. and Gully-Santiago, M. and Hedges, C. and Cody, A. M. and Barclay, T. and Howell, S. and Garnavich, P. and Tucker, B. E. and Shaya, E. and Mushotzky, R. and Olling, R. P. and Margheim, S. and Zenteno, A. and Coughlin, J. and Cleve, J. E.  Van and de Miranda Cardoso, J. Vinícius and Larson, K. A. and McCalmont-Everton, K. M. and Peterson, C. A. and Ross, S. E. and Reedy, L. H. and Osborne, D. and McGinn, C. and Kohnert, L. and Migliorini, L. and Wheaton, A. and Spencer, B. and Labonde, C. and Castillo, G. and Beerman, G. and Steward, K. and Hanley, M. and Larsen, R. and Gangopadhyay, R. and Kloetzel, R. and Weschler, T. and Nystrom, V. and Moffatt, J. and Redick, M. and Griest, K. and Packard, M. and Muszynski, M. and Kampmeier, J. and Bjella, R. and Flynn, S. and Elsaesser, B. and Chambers, K. C. and Flewelling, H. A. and Huber, M. E. and Magnier, E. A. and Waters, C. Z. and Schultz, A. S.  B. and Bulger, J. and Lowe, T. B. and Willman, M. and Smartt, S. J. and Smith, K. W. and Points, S. and Strampelli, G. M. and Brimacombe, J. and Chen, P. and Muñoz, J. A. and Mutel, R. L. and Shields, J. and Vallely, P. J. and Villanueva, S. and Li, W. and Wang, X. and Zhang, J. and Lin, H. and Mo, J. and Zhao, X. and Sai, H. and Zhang, X. and Zhang, K. and Zhang, T. and Wang, L. and Zhang, J. and Baron, E. and DerKacy, J. M. and Li, L. and Chen, Z. and Xiang, D. and Rui, L. and Wang, L. and Huang, F. and Li, X. and Hosseinzadeh, G. and Howell, D. A. and Arcavi, I. and Hiramatsu, D. and Burke, J. and Valenti, S. and Tonry, J. L. and Denneau, L. and Heinze, A. N. and Weiland, H. and Stalder, B. and Vinkó, J. and Sárneczky, K. and Pál, A. and Bódi, A. and Bognár, Zs. and Csák, B. and Cseh, B. and Csörnyei, G. and Hanyecz, O. and Ignácz, B. and Kalup, Cs. and Könyves-Tóth, R. and Kriskovics, L. and Ordasi, A. and Rajmon, I. and Sódor, A. and Szabó, R. and Szakáts, R. and Zsidi, G. and Williams, S. C. and Nordin, J. and Cartier, R. and Frohmaier, C. and Galbany, L. and Gutiérrez, C. P. and Hook, I. and Inserra, C. and Smith, M. and Sand, D. J. and Andrews, J. E. and Smith, N. and Bilinski, C.},

  abstractNote = {We present an exquisite 30 minute cadence Kepler (K2) light curve of the Type Ia supernova (SN Ia) 2018oh (ASASSN-18bt), starting weeks before explosion, covering the moment of explosion and the subsequent rise, and continuing past peak brightness. These data are supplemented by multi-color Panoramic Survey Telescope (Pan-STARRS1) and Rapid Response System 1 and Cerro Tololo Inter-American Observatory 4 m Dark Energy Camera (CTIO 4-m DECam) observations obtained within hours of explosion. The K2 light curve has an unusual two-component shape, where the flux rises with a steep linear gradient for the first few days, followed by a quadratic rise as seen for typical supernovae (SNe) Ia. This "flux excess" relative to canonical SN Ia behavior is confirmed in our i-band light curve, and furthermore, SN 2018oh is especially blue during the early epochs. The flux excess peaks 2.14 ± 0.04 days after explosion, has a FWHM of 3.12 ± 0.04 days, a blackbody temperature of $T = 17,500^{+11,500}_{-9,000}$ K, a peak luminosity of 4.3 ± 0.2 x 1038 erg s-1, and a total integrated energy of 1.27 ± 0.01 x 1043 erg. We compare SN 2018oh to several models that may provide additional heating at early times, including collision with a companion and a shallow concentration of radioactive nickel. While all of these models generally reproduce the early K2 light curve shape, we slightly favor a companion interaction, at a distance of ~ 2 x 1012 based on our early color measurements, although the exact distance depends on the uncertain viewing angle. Additional confirmation of a companion interaction in future modeling and observations of SN 2018oh would provide strong support for a single-degenerate progenitor system.},

  doi          = {10.3847/2041-8213/aaedb0},

  journal      = {The Astrophysical Journal. Letters (Online)},

  number       = 1,

  volume       = 870,

  place        = {United States},

  year         = {Fri Dec 28 00:00:00 EST 2018},

  month        = {Fri Dec 28 00:00:00 EST 2018}

}

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ASASSN-18tb: a most unusual Type Ia supernova observed by TESS and SALT

Journal Article Vallely, P. J. ; Fausnaugh, M. ; Jha, S. W. ; ... - Monthly Notices of the Royal Astronomical Society

ABSTRACT We present photometric and spectroscopic observations of the unusual Type Ia supernova ASASSN-18tb, including a series of Southern African Large Telescope spectra obtained over the course of nearly six months and the first observations of a supernova by the Transiting Exoplanet Survey Satellite. We confirm a previous observation by Kollmeier et al. showing that ASASSN-18tb is the first relatively normal Type Ia supernova to exhibit clear broad (∼1000 km s−1) H α emission in its nebular-phase spectra. We find that this event is best explained as a sub-Chandrasekhar mass explosion producingmore »« less
Cited by 47
https://doi.org/10.1093/mnras/stz1445
The young and bright type ia supernova ASASSN-14lP: discovery, early-time observations, first-light time, distance to NGC 4666, and progenitor constraints

Journal Article Shappee, B. J. ; Piro, A. L. ; Burns, C. R. ; ... - Astrophysical Journal

On 2014 December 9.61, the All-sky Automated Survey for SuperNovae (ASAS-SN or “Assassin”) discovered ASASSN-14lp just ∼2 days after first light using a global array of 14 cm diameter telescopes. ASASSN-14lp 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-14lp for more than 100 days. We find that ASASSN-14lp had a broad light curve (Δm{sub 15}(B)=0.80±0.05), a B-band maximum at 2457015.82more »« less
https://doi.org/10.3847/0004-637X/826/2/144
Early Observations of the Type Ia Supernova iPTF 16abc: A Case of Interaction with Nearby, Unbound Material and/or Strong Ejecta Mixing

Journal Article Miller, A. A. ; Cao, Y. ; Piro, A. L. ; ... - The Astrophysical Journal (Online)

Early observations of Type Ia supernovae (SNe Ia) provide a unique probe of their progenitor systems and explosion physics. Here we report the intermediate Palomar Transient Factory (iPTF) discovery of an extraordinarily young SN Ia, iPTF 16abc. By fitting a power law to our early light curve, we infer that first light for the SN, that is when the SN could have first been detected by our survey, occurred onlymore »« less
Cited by 45
https://doi.org/10.3847/1538-4357/aaa01f

Full Text Available
The young and bright Type Ia supernova ASASSN-14lp: Discovery, early-time observations, first-light time, distance to NGC 4666, and progenitor constraints

Journal Article Shappee, B. J. ; Piro, A. L. ; Holoien, T. W. -S. ; ... - The Astrophysical Journal (Online)

On 2014 December 9.61, the All-sky Automated Survey for SuperNovae (ASAS-SN or "Assassin") discovered ASASSN-14lp just ~2 days after first light using a global array of 14 cm diameter telescopes. ASASSN-14lp 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-14lp for more than 100 days. We find that ASASSN-14lp had a broad light curve (more »« less
Cited by 46
https://doi.org/10.3847/0004-637X/826/2/144

Full Text Available
PS1-10afx AT z = 1.388: PAN-STARRS1 DISCOVERY OF A NEW TYPE OF SUPERLUMINOUS SUPERNOVA

Journal Article Chornock, R. ; Berger, E. ; Milisavljevic, D. ; ... - Astrophysical Journal

We present the Pan-STARRS1 discovery of PS1-10afx, a unique hydrogen-deficient superluminous supernova (SLSN) at redshift z = 1.388. The light curve peaked at z{sub P1} = 21.7 mag, making PS1-10afx comparable to the most luminous known SNe, with M{sub u} = -22.3 mag. Our extensive optical and near-infrared observations indicate that the bolometric light curve of PS1-10afx rose on the unusually fast timescale of {approx}12 days to the extraordinary peak luminosity of 4.1 Multiplication-Sign 10{sup 44} erg s{sup -1} (M{sub bol} = -22.8 mag) and subsequently faded rapidly. Equally important, the spectral energy distribution is unusually red for an SLSN,more »« less
https://doi.org/10.1088/0004-637X/767/2/162

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Title: K2 Observations of SN 2018oh Reveal a Two-component Rising Light Curve for a Type Ia Supernova

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Citation Formats

Type I supernovae. I - Analytic solutions for the early part of the light curve journal, February 1982

Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples journal, August 2014

CONSTRAINING TYPE Ia SUPERNOVAE PROGENITORS FROM THREE YEARS OF SUPERNOVA LEGACY SURVEY DATA journal, October 2011

A COMPACT DEGENERATE PRIMARY-STAR PROGENITOR OF SN 2011fe journal, December 2011

CONSTRAINTS ON TYPE Ia SUPERNOVA PROGENITOR COMPANIONS FROM EARLY ULTRAVIOLET OBSERVATIONS WITH SWIFT journal, March 2012

THE CARNEGIE SUPERNOVA PROJECT: LIGHT-CURVE FITTING WITH SNooPy journal, December 2010

SN2002es-LIKE SUPERNOVAE FROM DIFFERENT VIEWING ANGLES journal, November 2016

Early Supernova Luminosity journal, August 1969

SN 2012fr: Ultraviolet, Optical, and Near-infrared Light Curves of a Type Ia Supernova Observed within a Day of Explosion journal, May 2018

PTF 11kx: A Type Ia Supernova with a Symbiotic Nova Progenitor journal, August 2012

Approximations to the radii of Roche lobes journal, May 1983

The rising light curves of Type Ia supernovae journal, December 2014

Correcting for the Effects of Interstellar Extinction journal, January 1999

The dark Energy Camera journal, October 2015

VERY EARLY ULTRAVIOLET AND OPTICAL OBSERVATIONS OF THE TYPE Ia SUPERNOVA 2009ig journal, December 2011

LINKING TYPE Ia SUPERNOVA PROGENITORS AND THEIR RESULTING EXPLOSIONS journal, May 2012

emcee : The MCMC Hammer journal, March 2013

On the nature of Type IIn/Ia–CSM supernovae: optical and near-infrared spectra of SN 2012ca and SN 2013dn journal, December 2014

The rise-time distribution of nearby Type Ia supernovae: Rise times of nearby SNe Ia journal, August 2011

THE LOW-VELOCITY, RAPIDLY FADING TYPE Ia SUPERNOVA 2002es journal, May 2012

SHOCK BREAKOUT AND EARLY LIGHT CURVES OF TYPE II-P SUPERNOVAE OBSERVED WITH KEPLER journal, March 2016

THE RISE TIME OF NORMAL AND SUBLUMINOUS TYPE Ia SUPERNOVAE journal, December 2011

The rise of sn 2014j in the Nearby Galaxy m82 journal, March 2014

The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints journal, November 2010

KEPLER SCIENCE OPERATIONS journal, March 2010

SINGLE OR DOUBLE DEGENERATE PROGENITORS? SEARCHING FOR SHOCK EMISSION IN THE SDSS-II TYPE Ia SUPERNOVAE journal, October 2010

THE RISE AND FALL OF TYPE Ia SUPERNOVA LIGHT CURVES IN THE SDSS-II SUPERNOVA SURVEY journal, March 2010

Towards an understanding of Type Ia supernovae from a synthesis of theory and observations journal, April 2013

Type Ia Supernova Explosion Models journal, September 2000

Early Blue Excess from the Type Ia Supernova 2017cbv and Implications for Its Progenitor journal, August 2017

Nucleosynthesis in Supernovae. journal, July 1960

K ‐Corrections and Spectral Templates of Type Ia Supernovae journal, July 2007

Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M not greater than about 9 solar masses) journal, January 1984

A hybrid type Ia supernova with an early flash triggered by helium-shell detonation journal, October 2017

Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters journal, April 2018

Seeing the Collision of a Supernova with its Companion star journal, December 2009

The diversity of type Ia supernovae from broken symmetries journal, August 2009

CONSTRAINTS ON THE PROGENITOR SYSTEM OF THE TYPE Ia SUPERNOVA 2014J FROM PRE-EXPLOSION HUBBLE SPACE TELESCOPE IMAGING journal, June 2014

HUBBLE RESIDUALS OF NEARBY TYPE Ia SUPERNOVAE ARE CORRELATED WITH HOST GALAXY MASSES journal, May 2010

A Reconnaissance of the Possible Donor Stars to the Kepler Supernova journal, January 2014

Hunting for the Progenitor of sn 1006: High-Resolution Spectroscopic Search with the Flames Instrument journal, October 2012

SNANA: A Public Software Package for Supernova Analysis journal, September 2009

Connecting the progenitors, pre-explosion variability and giant outbursts of luminous blue variables with Gaia16cfr journal, October 2017

The peculiar Type Ia supernova iPTF14atg: Chandrasekhar-mass explosion or violent merger? journal, April 2016

THE EFFECT OF HOST GALAXIES ON TYPE Ia SUPERNOVAE IN THE SDSS-II SUPERNOVA SURVEY journal, September 2010

Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe journal, December 2011

THE IMPACT OF TYPE Ia SUPERNOVA EXPLOSIONS ON HELIUM COMPANIONS IN THE CHANDRASEKHAR-MASS EXPLOSION SCENARIO journal, August 2013

A statistical analysis of circumstellar material in Type Ia supernovae journal, September 2013

Observational Clues to the Progenitors of Type Ia Supernovae journal, August 2014

SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION journal, March 2016

Neutronization During Carbon Simmering in type ia Supernova Progenitors journal, June 2016

A luminous, blue progenitor system for the type Iax supernova 2012Z journal, August 2014

Early Observations of the Type Ia Supernova iPTF 16abc: A Case of Interaction with Nearby, Unbound Material and/or Strong Ejecta Mixing journal, January 2018

Early light curves for Type Ia supernova explosion models journal, August 2017

Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star journal, December 2011

No signature of ejecta interaction with a stellar companion in three type Ia supernovae journal, May 2015

NORMAL TYPE Ia SUPERNOVAE FROM VIOLENT MERGERS OF WHITE DWARF BINARIES journal, February 2012

IMPACT OF TYPE Ia SUPERNOVA EJECTA ON BINARY COMPANIONS IN THE SINGLE-DEGENERATE SCENARIO journal, April 2012

Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory journal, June 2013

Measurements of Ω and Λ from 42 High‐Redshift Supernovae journal, June 1999

Measurements of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z ≥ 0.35 journal, July 1997

SHOCK BREAKOUT FROM TYPE Ia SUPERNOVA journal, December 2009

Exploring the Potential Diversity of Early type ia Supernova Light Curves journal, July 2016

What can we Learn from the Rising Light Curves of Radioactively Powered Supernovae? journal, May 2013

A fast-evolving luminous transient discovered by K2/Kepler journal, March 2018

COSMOLOGICAL CONSTRAINTS FROM MEASUREMENTS OF TYPE Ia SUPERNOVAE DISCOVERED DURING THE FIRST 1.5 yr OF THE Pan-STARRS1 SURVEY journal, October 2014

Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey journal, December 2005

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant journal, September 1998

The Rise Time of Nearby Type I[CLC]a[/CLC] Supernovae journal, December 1999

An absence of ex-companion stars in the type Ia supernova remnant SNR 0509−67.5 journal, January 2012

DOPHOT, a CCD photometry program: Description and tests journal, July 1993

Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd journal, August 2011

The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample journal, May 2018

THE YOUNG AND BRIGHT TYPE IA SUPERNOVA ASASSN-14lp: DISCOVERY, EARLY-TIME OBSERVATIONS, FIRST-LIGHT TIME, DISTANCE TO NGC 4666, AND PROGENITOR CONSTRAINTS journal, July 2016

Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light Curve journal, December 2018

Strong Evidence against a Non-degenerate Companion in SN 2012cg journal, February 2018

The man Behind the Curtain: X-Rays Drive the uv Through nir Variability in the 2013 Active Galactic Nucleus Outburst in ngc 2617 journal, May 2014

Type I supernovae. I - Analytic solutions for the early part of the light curve
journal, February 1982

Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
journal, August 2014

CONSTRAINING TYPE Ia SUPERNOVAE PROGENITORS FROM THREE YEARS OF SUPERNOVA LEGACY SURVEY DATA
journal, October 2011

A COMPACT DEGENERATE PRIMARY-STAR PROGENITOR OF SN 2011fe
journal, December 2011

CONSTRAINTS ON TYPE Ia SUPERNOVA PROGENITOR COMPANIONS FROM EARLY ULTRAVIOLET OBSERVATIONS WITH SWIFT
journal, March 2012

THE CARNEGIE SUPERNOVA PROJECT: LIGHT-CURVE FITTING WITH SNooPy
journal, December 2010

SN2002es-LIKE SUPERNOVAE FROM DIFFERENT VIEWING ANGLES
journal, November 2016

Early Supernova Luminosity
journal, August 1969

SN 2012fr: Ultraviolet, Optical, and Near-infrared Light Curves of a Type Ia Supernova Observed within a Day of Explosion
journal, May 2018

PTF 11kx: A Type Ia Supernova with a Symbiotic Nova Progenitor
journal, August 2012

Approximations to the radii of Roche lobes
journal, May 1983

The rising light curves of Type Ia supernovae
journal, December 2014

Correcting for the Effects of Interstellar Extinction
journal, January 1999

The dark Energy Camera
journal, October 2015

VERY EARLY ULTRAVIOLET AND OPTICAL OBSERVATIONS OF THE TYPE Ia SUPERNOVA 2009ig
journal, December 2011

LINKING TYPE Ia SUPERNOVA PROGENITORS AND THEIR RESULTING EXPLOSIONS
journal, May 2012

`emcee` : The MCMC Hammer
journal, March 2013

On the nature of Type IIn/Ia–CSM supernovae: optical and near-infrared spectra of SN 2012ca and SN 2013dn
journal, December 2014

The rise-time distribution of nearby Type Ia supernovae: Rise times of nearby SNe Ia
journal, August 2011

THE LOW-VELOCITY, RAPIDLY FADING TYPE Ia SUPERNOVA 2002es
journal, May 2012

SHOCK BREAKOUT AND EARLY LIGHT CURVES OF TYPE II-P SUPERNOVAE OBSERVED WITH KEPLER
journal, March 2016

THE RISE TIME OF NORMAL AND SUBLUMINOUS TYPE Ia SUPERNOVAE
journal, December 2011

The rise of sn 2014j in the Nearby Galaxy m82
journal, March 2014

The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints
journal, November 2010

KEPLER SCIENCE OPERATIONS
journal, March 2010

SINGLE OR DOUBLE DEGENERATE PROGENITORS? SEARCHING FOR SHOCK EMISSION IN THE SDSS-II TYPE Ia SUPERNOVAE
journal, October 2010

THE RISE AND FALL OF TYPE Ia SUPERNOVA LIGHT CURVES IN THE SDSS-II SUPERNOVA SURVEY
journal, March 2010

Towards an understanding of Type Ia supernovae from a synthesis of theory and observations
journal, April 2013

Type Ia Supernova Explosion Models
journal, September 2000

Early Blue Excess from the Type Ia Supernova 2017cbv and Implications for Its Progenitor
journal, August 2017

Nucleosynthesis in Supernovae.
journal, July 1960

K ‐Corrections and Spectral Templates of Type Ia Supernovae
journal, July 2007

Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M not greater than about 9 solar masses)
journal, January 1984

A hybrid type Ia supernova with an early flash triggered by helium-shell detonation
journal, October 2017

Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters
journal, April 2018

Seeing the Collision of a Supernova with its Companion star
journal, December 2009

The diversity of type Ia supernovae from broken symmetries
journal, August 2009

CONSTRAINTS ON THE PROGENITOR SYSTEM OF THE TYPE Ia SUPERNOVA 2014J FROM PRE-EXPLOSION HUBBLE SPACE TELESCOPE IMAGING
journal, June 2014

HUBBLE RESIDUALS OF NEARBY TYPE Ia SUPERNOVAE ARE CORRELATED WITH HOST GALAXY MASSES
journal, May 2010

A Reconnaissance of the Possible Donor Stars to the Kepler Supernova
journal, January 2014

Hunting for the Progenitor of sn 1006: High-Resolution Spectroscopic Search with the Flames Instrument
journal, October 2012

SNANA: A Public Software Package for Supernova Analysis
journal, September 2009

Connecting the progenitors, pre-explosion variability and giant outbursts of luminous blue variables with Gaia16cfr
journal, October 2017

The peculiar Type Ia supernova iPTF14atg: Chandrasekhar-mass explosion or violent merger?
journal, April 2016

THE EFFECT OF HOST GALAXIES ON TYPE Ia SUPERNOVAE IN THE SDSS-II SUPERNOVA SURVEY
journal, September 2010

Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe
journal, December 2011

THE IMPACT OF TYPE Ia SUPERNOVA EXPLOSIONS ON HELIUM COMPANIONS IN THE CHANDRASEKHAR-MASS EXPLOSION SCENARIO
journal, August 2013

A statistical analysis of circumstellar material in Type Ia supernovae
journal, September 2013

Observational Clues to the Progenitors of Type Ia Supernovae
journal, August 2014

SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION
journal, March 2016

Neutronization During Carbon Simmering in type ia Supernova Progenitors
journal, June 2016

A luminous, blue progenitor system for the type Iax supernova 2012Z
journal, August 2014

Early Observations of the Type Ia Supernova iPTF 16abc: A Case of Interaction with Nearby, Unbound Material and/or Strong Ejecta Mixing
journal, January 2018

Early light curves for Type Ia supernova explosion models
journal, August 2017

Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star
journal, December 2011

No signature of ejecta interaction with a stellar companion in three type Ia supernovae
journal, May 2015

NORMAL TYPE Ia SUPERNOVAE FROM VIOLENT MERGERS OF WHITE DWARF BINARIES
journal, February 2012

IMPACT OF TYPE Ia SUPERNOVA EJECTA ON BINARY COMPANIONS IN THE SINGLE-DEGENERATE SCENARIO
journal, April 2012

Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
journal, June 2013

Measurements of Ω and Λ from 42 High‐Redshift Supernovae
journal, June 1999

Measurements of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z ≥ 0.35
journal, July 1997

SHOCK BREAKOUT FROM TYPE Ia SUPERNOVA
journal, December 2009

Exploring the Potential Diversity of Early type ia Supernova Light Curves
journal, July 2016

What can we Learn from the Rising Light Curves of Radioactively Powered Supernovae?
journal, May 2013

A fast-evolving luminous transient discovered by K2/Kepler
journal, March 2018

COSMOLOGICAL CONSTRAINTS FROM MEASUREMENTS OF TYPE Ia SUPERNOVAE DISCOVERED DURING THE FIRST 1.5 yr OF THE Pan-STARRS1 SURVEY
journal, October 2014

Testing LMC Microlensing Scenarios: The Discrimination Power of the SuperMACHO Microlensing Survey
journal, December 2005

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
journal, September 1998

The Rise Time of Nearby Type I[CLC]a[/CLC] Supernovae
journal, December 1999

An absence of ex-companion stars in the type Ia supernova remnant SNR 0509−67.5
journal, January 2012

DOPHOT, a CCD photometry program: Description and tests
journal, July 1993

Measuring Reddening with Sloan Digital sky Survey Stellar Spectra and Recalibrating sfd
journal, August 2011

The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
journal, May 2018

THE YOUNG AND BRIGHT TYPE IA SUPERNOVA ASASSN-14lp: DISCOVERY, EARLY-TIME OBSERVATIONS, FIRST-LIGHT TIME, DISTANCE TO NGC 4666, AND PROGENITOR CONSTRAINTS
journal, July 2016

Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light Curve
journal, December 2018

Strong Evidence against a Non-degenerate Companion in SN 2012cg
journal, February 2018

The man Behind the Curtain: X-Rays Drive the uv Through nir Variability in the 2013 Active Galactic Nucleus Outburst in ngc 2617
journal, May 2014

ACTIVE GALACTIC NUCLEI DISCOVERED IN THE KEPLER MISSION
journal, December 2015

TYPE Ia SUPERNOVAE STRONGLY INTERACTING WITH THEIR CIRCUMSTELLAR MEDIUM
journal, June 2013

2D simulations of the double-detonation model for thermonuclear transients from low-mass carbon-oxygen white dwarfs: Double-detonation model for faint transients
journal, February 2012