The mystery of photometric twins DES17X1boj and DES16E2bjy

M. Pursiainen; C. P. Gutiérrez; P. Wiseman; M. Childress; M. Smith; C. Frohmaier; C. Angus; N. Castro Segura; L. Kelsey; M. Sullivan; L. Galbany; P. Nugent; B. A. Bassett; D. Brout; D. Carollo; C. B. D'andrea; T. M. Davis; R. J. Foley; M. Grayling; S. R. Hinton; C. Inserra; R. Kessler; G. F. Lewis; C. Lidman; E. Macaulay; M. March; A. Möller; T. Müller; D. Scolnic; N. E. Sommer; E. Swann; B. P. Thomas; B. E. Tucker; M. Vincenzi; T. M.C. Abbott; S. Allam; J. Annis; S. Avila; E. Bertin; D. Brooks; E. Buckley-Geer; D. L. Burke; A. Carnero Rosell; M. Carrasco Kind; L. N. Da Costa; J. De Vicente; S. Desai; H. T. Diehl; P. Doel; T. F. Eifler; S. Everett; B. Flaugher; J. Frieman; J. García-Bellido; E. Gaztanaga; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; D. L. Hollowood; K. Honscheid; D. J. James; A. G. Kim; E. Krause; K. Kuehn; M. A.G. Maia; J. L. Marshall; F. Menanteau; R. Miquel; R. L.C. Ogando; A. Palmese; F. Paz-Chinchón; A. A. Plazas; A. Roodman; E. Sanchez; V. Scarpine; M. Schubnell; S. Serrano; I. Sevilla-Noarbe; E. Suchyta; M. E.C. Swanson; G. Tarle; W. Wester

doi:10.1093/mnras/staa995

The mystery of photometric twins DES17X1boj and DES16E2bjy

M. Pursiainen, C. P. Gutiérrez, P. Wiseman, M. Childress, M. Smith, C. Frohmaier, C. Angus, N. Castro Segura, L. Kelsey, M. Sullivan, L. Galbany, P. Nugent, B. A. Bassett, D. Brout, D. Carollo, C. B. D'andrea, T. M. Davis, R. J. Foley, M. Grayling, S. R. HintonC. Inserra, R. Kessler, G. F. Lewis, C. Lidman, E. Macaulay, M. March, A. Möller, T. Müller, D. Scolnic, N. E. Sommer, E. Swann, B. P. Thomas, B. E. Tucker, M. Vincenzi, T. M.C. Abbott, S. Allam, J. Annis, S. Avila, E. Bertin, D. Brooks, E. Buckley-Geer, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, L. N. Da Costa, J. De Vicente, S. Desai, H. T. Diehl, P. Doel, T. F. Eifler, S. Everett, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, D. L. Hollowood, K. Honscheid, D. J. James, A. G. Kim, E. Krause, K. Kuehn, M. A.G. Maia, J. L. Marshall, F. Menanteau, R. Miquel, R. L.C. Ogando, A. Palmese, F. Paz-Chinchón, A. A. Plazas, A. Roodman, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, E. Suchyta, M. E.C. Swanson, G. Tarle, W. Wester

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Abstract

We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = -15.4 and -17.9, respectively). The light-curve evolution of these events is highly atypical and has not been reported before. The transients are found in different host environments: DES17X1boj was found near the nucleus of a spiral galaxy, while DES16E2bjy is located in the outskirts of a passive red galaxy. Early photometric data are well fitted with a blackbody and the resulting moderate photospheric expansion velocities (1800 km s-1 for DES17X1boj and 4800 km s-1 for DES16E2bjy) suggest an explosive or eruptive origin. Additionally, a feature identified as high-velocity Ca ii absorption (v ≈ 9400 km s-1) in the near-peak spectrum of DES17X1boj may imply that it is a supernova. While similar light-curve evolution suggests a similar physical origin for these two transients, we are not able to identify or characterize the progenitors.

Original language	English
Pages (from-to)	5576-5589
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	494
Issue number	4
DOIs	https://doi.org/10.1093/mnras/staa995
Publication status	Published - 1 Jun 2020

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10.1093/mnras/staa995

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Pursiainen, M., Gutiérrez, C. P., Wiseman, P., Childress, M., Smith, M., Frohmaier, C., Angus, C., Castro Segura, N., Kelsey, L., Sullivan, M., Galbany, L., Nugent, P., Bassett, B. A., Brout, D., Carollo, D., D'andrea, C. B., Davis, T. M., Foley, R. J., Grayling, M., ... Wester, W. (2020). The mystery of photometric twins DES17X1boj and DES16E2bjy. Monthly Notices of the Royal Astronomical Society, 494(4), 5576-5589. https://doi.org/10.1093/mnras/staa995

@article{a1878b2491194a02b2189441ceb43957,

title = "The mystery of photometric twins DES17X1boj and DES16E2bjy",

abstract = "We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = -15.4 and -17.9, respectively). The light-curve evolution of these events is highly atypical and has not been reported before. The transients are found in different host environments: DES17X1boj was found near the nucleus of a spiral galaxy, while DES16E2bjy is located in the outskirts of a passive red galaxy. Early photometric data are well fitted with a blackbody and the resulting moderate photospheric expansion velocities (1800 km s-1 for DES17X1boj and 4800 km s-1 for DES16E2bjy) suggest an explosive or eruptive origin. Additionally, a feature identified as high-velocity Ca ii absorption (v ≈ 9400 km s-1) in the near-peak spectrum of DES17X1boj may imply that it is a supernova. While similar light-curve evolution suggests a similar physical origin for these two transients, we are not able to identify or characterize the progenitors.",

keywords = "supernovae: General",

author = "M. Pursiainen and Guti{\'e}rrez, {C. P.} and P. Wiseman and M. Childress and M. Smith and C. Frohmaier and C. Angus and {Castro Segura}, N. and L. Kelsey and M. Sullivan and L. Galbany and P. Nugent and Bassett, {B. A.} and D. Brout and D. Carollo and D'andrea, {C. B.} and Davis, {T. M.} and Foley, {R. J.} and M. Grayling and Hinton, {S. R.} and C. Inserra and R. Kessler and Lewis, {G. F.} and C. Lidman and E. Macaulay and M. March and A. M{\"o}ller and T. M{\"u}ller and D. Scolnic and Sommer, {N. E.} and E. Swann and Thomas, {B. P.} and Tucker, {B. E.} and M. Vincenzi and Abbott, {T. M.C.} and S. Allam and J. Annis and S. Avila and E. Bertin and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and {Carnero Rosell}, A. and {Carrasco Kind}, M. and {Da Costa}, {L. N.} and {De Vicente}, J. and S. Desai and Diehl, {H. T.} and P. Doel and Eifler, {T. F.} and S. Everett and B. Flaugher and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and Kim, {A. G.} and E. Krause and K. Kuehn and Maia, {M. A.G.} and Marshall, {J. L.} and F. Menanteau and R. Miquel and Ogando, {R. L.C.} and A. Palmese and F. Paz-Chinch{\'o}n and Plazas, {A. A.} and A. Roodman and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and E. Suchyta and Swanson, {M. E.C.} and G. Tarle and W. Wester",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s).",

year = "2020",

month = jun,

day = "1",

doi = "10.1093/mnras/staa995",

language = "English",

volume = "494",

pages = "5576--5589",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

}

Pursiainen, M, Gutiérrez, CP, Wiseman, P, Childress, M, Smith, M, Frohmaier, C, Angus, C, Castro Segura, N, Kelsey, L, Sullivan, M, Galbany, L, Nugent, P, Bassett, BA, Brout, D, Carollo, D, D'andrea, CB, Davis, TM, Foley, RJ, Grayling, M, Hinton, SR, Inserra, C, Kessler, R, Lewis, GF, Lidman, C, Macaulay, E, March, M, Möller, A, Müller, T, Scolnic, D, Sommer, NE, Swann, E, Thomas, BP, Tucker, BE, Vincenzi, M, Abbott, TMC, Allam, S, Annis, J, Avila, S, Bertin, E, Brooks, D, Buckley-Geer, E, Burke, DL, Carnero Rosell, A, Carrasco Kind, M, Da Costa, LN, De Vicente, J, Desai, S, Diehl, HT, Doel, P, Eifler, TF, Everett, S, Flaugher, B, Frieman, J, García-Bellido, J, Gaztanaga, E, Gerdes, DW, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Hollowood, DL, Honscheid, K, James, DJ, Kim, AG, Krause, E, Kuehn, K, Maia, MAG, Marshall, JL, Menanteau, F, Miquel, R, Ogando, RLC, Palmese, A, Paz-Chinchón, F, Plazas, AA, Roodman, A, Sanchez, E, Scarpine, V, Schubnell, M, Serrano, S, Sevilla-Noarbe, I, Suchyta, E, Swanson, MEC, Tarle, G & Wester, W 2020, 'The mystery of photometric twins DES17X1boj and DES16E2bjy', Monthly Notices of the Royal Astronomical Society, vol. 494, no. 4, pp. 5576-5589. https://doi.org/10.1093/mnras/staa995

TY - JOUR

T1 - The mystery of photometric twins DES17X1boj and DES16E2bjy

AU - Pursiainen, M.

AU - Gutiérrez, C. P.

AU - Wiseman, P.

AU - Childress, M.

AU - Smith, M.

AU - Frohmaier, C.

AU - Angus, C.

AU - Castro Segura, N.

AU - Kelsey, L.

AU - Sullivan, M.

AU - Galbany, L.

AU - Nugent, P.

AU - Bassett, B. A.

AU - Brout, D.

AU - Carollo, D.

AU - D'andrea, C. B.

AU - Davis, T. M.

AU - Foley, R. J.

AU - Grayling, M.

AU - Hinton, S. R.

AU - Inserra, C.

AU - Kessler, R.

AU - Lewis, G. F.

AU - Lidman, C.

AU - Macaulay, E.

AU - March, M.

AU - Möller, A.

AU - Müller, T.

AU - Scolnic, D.

AU - Sommer, N. E.

AU - Swann, E.

AU - Thomas, B. P.

AU - Tucker, B. E.

AU - Vincenzi, M.

AU - Abbott, T. M.C.

AU - Allam, S.

AU - Annis, J.

AU - Avila, S.

AU - Bertin, E.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Da Costa, L. N.

AU - De Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Eifler, T. F.

AU - Everett, S.

AU - Flaugher, B.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Kim, A. G.

AU - Krause, E.

AU - Kuehn, K.

AU - Maia, M. A.G.

AU - Marshall, J. L.

AU - Menanteau, F.

AU - Miquel, R.

AU - Ogando, R. L.C.

AU - Palmese, A.

AU - Paz-Chinchón, F.

AU - Plazas, A. A.

AU - Roodman, A.

AU - Sanchez, E.

AU - Scarpine, V.

AU - Schubnell, M.

AU - Serrano, S.

AU - Sevilla-Noarbe, I.

AU - Suchyta, E.

AU - Swanson, M. E.C.

AU - Tarle, G.

AU - Wester, W.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = -15.4 and -17.9, respectively). The light-curve evolution of these events is highly atypical and has not been reported before. The transients are found in different host environments: DES17X1boj was found near the nucleus of a spiral galaxy, while DES16E2bjy is located in the outskirts of a passive red galaxy. Early photometric data are well fitted with a blackbody and the resulting moderate photospheric expansion velocities (1800 km s-1 for DES17X1boj and 4800 km s-1 for DES16E2bjy) suggest an explosive or eruptive origin. Additionally, a feature identified as high-velocity Ca ii absorption (v ≈ 9400 km s-1) in the near-peak spectrum of DES17X1boj may imply that it is a supernova. While similar light-curve evolution suggests a similar physical origin for these two transients, we are not able to identify or characterize the progenitors.

AB - We present an analysis of DES17X1boj and DES16E2bjy, two peculiar transients discovered by the Dark Energy Survey (DES). They exhibit nearly identical double-peaked light curves that reach very different maximum luminosities (Mr = -15.4 and -17.9, respectively). The light-curve evolution of these events is highly atypical and has not been reported before. The transients are found in different host environments: DES17X1boj was found near the nucleus of a spiral galaxy, while DES16E2bjy is located in the outskirts of a passive red galaxy. Early photometric data are well fitted with a blackbody and the resulting moderate photospheric expansion velocities (1800 km s-1 for DES17X1boj and 4800 km s-1 for DES16E2bjy) suggest an explosive or eruptive origin. Additionally, a feature identified as high-velocity Ca ii absorption (v ≈ 9400 km s-1) in the near-peak spectrum of DES17X1boj may imply that it is a supernova. While similar light-curve evolution suggests a similar physical origin for these two transients, we are not able to identify or characterize the progenitors.

KW - supernovae: General

UR - http://www.scopus.com/inward/record.url?scp=85094557547&partnerID=8YFLogxK

U2 - 10.1093/mnras/staa995

DO - 10.1093/mnras/staa995

M3 - Article

SN - 0035-8711

VL - 494

SP - 5576

EP - 5589

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The mystery of photometric twins DES17X1boj and DES16E2bjy

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