The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448

Radosław Poleski; Wei Zhu; Grant W. Christie; Andrzej Udalski; Andrew Gould; Etienne Bachelet; Jesper Skottfelt; Sebastiano Calchi Novati; M. K. Szymański; I. Soszyński; G. Pietrzyński; Ł. Wyrzykowski; K. Ulaczyk; P. Pietrukowicz; Szymon Kozłowski; J. Skowron; P. Mróz; M. Pawlak; C. Beichman; G. Bryden; S. Carey; M. Fausnaugh; B. S. Gaudi; C. B. Henderson; R. W. Pogge; Y. Shvartzvald; B. Wibking; J. C. Yee; T. G. Beatty; J. D. Eastman; J. Drummond; M. Friedmann; M. Henderson; J. A. Johnson; S. Kaspi; D. Maoz; J. McCormick; N. McCrady; T. Natusch; H. Ngan; I. Porritt; H. M. Relles; D. H. Sliski; T.-G. Tan; R. A. Wittenmyer; J. T. Wright; R. A. Street; Y. Tsapras; D. M. Bramich; K. Horne; C. Snodgrass; I. A. Steele; J. Menzies; R. Figuera Jaimes; J. Wambsganss; R. Schmidt; A. Cassan; C. Ranc; S. Mao; V. Bozza; M. Dominik; M. P. G. Hundertmark; U. G. Jørgensen; M. I. Andersen; M. J. Burgdorf; S. Ciceri; G. D’Ago; D. F. Evans; S.-H. Gu; T. C. Hinse; N. Kains; E. Kerins; H. Korhonen; M. Kuffmeier; L. Mancini; A. Popovas; M. Rabus; S. Rahvar; R. T. Rasmussen; G. Scarpetta; J. Southworth; J. Surdej; E. Unda-Sanzana; P. Verma; C. von Essen; Y.-B. Wang; O. Wertz

doi:10.3847/0004-637X/823/1/63

The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448

Radosław Poleski, Wei Zhu, Grant W. Christie, Andrzej Udalski, Andrew Gould, Etienne Bachelet, Jesper Skottfelt, Sebastiano Calchi Novati, M. K. Szymański, I. Soszyński, G. Pietrzyński, Ł. Wyrzykowski, K. Ulaczyk, P. Pietrukowicz, Szymon Kozłowski, J. Skowron, P. Mróz, M. Pawlak, C. Beichman, G. BrydenS. Carey, M. Fausnaugh, B. S. Gaudi, C. B. Henderson, R. W. Pogge, Y. Shvartzvald, B. Wibking, J. C. Yee, T. G. Beatty, J. D. Eastman, J. Drummond, M. Friedmann, M. Henderson, J. A. Johnson, S. Kaspi, D. Maoz, J. McCormick, N. McCrady, T. Natusch, H. Ngan, I. Porritt, H. M. Relles, D. H. Sliski, T.-G. Tan, R. A. Wittenmyer, J. T. Wright, R. A. Street, Y. Tsapras, D. M. Bramich, K. Horne, C. Snodgrass, I. A. Steele, J. Menzies, R. Figuera Jaimes, J. Wambsganss, R. Schmidt, A. Cassan, C. Ranc, S. Mao, V. Bozza, M. Dominik, M. P. G. Hundertmark, U. G. Jørgensen, M. I. Andersen, M. J. Burgdorf, S. Ciceri, G. D’Ago, D. F. Evans, S.-H. Gu, T. C. Hinse, N. Kains, E. Kerins, H. Korhonen, M. Kuffmeier, L. Mancini, A. Popovas, M. Rabus, S. Rahvar, R. T. Rasmussen, G. Scarpetta, J. Southworth, J. Surdej, E. Unda-Sanzana, P. Verma, C. von Essen, Y.-B. Wang, O. Wertz

School of Physics and Astronomy

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Abstract

The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters.We measure the proper motion of NGC 6558 μ_cl(N, E)=(+0.36 ± 0.10,+1.42 ± 0.10) mas yr^-1) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.

Original language	English
Article number	63
Number of pages	11
Journal	Astrophysical Journal
Volume	823
Issue number	1
DOIs	https://doi.org/10.3847/0004-637X/823/1/63
Publication status	Published - 20 May 2016

Keywords

Globular clusters: individual: NGC6558
Gravitational lensing: micro
Planets and satellites: detection
Proper motions

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Poleski, R., Zhu, W., Christie, G. W., Udalski, A., Gould, A., Bachelet, E., Skottfelt, J., Calchi Novati, S., Szymański, M. K., Soszyński, I., Pietrzyński, G., Wyrzykowski, Ł., Ulaczyk, K., Pietrukowicz, P., Kozłowski, S., Skowron, J., Mróz, P., Pawlak, M., Beichman, C., ... Wertz, O. (2016). The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448. Astrophysical Journal, 823(1), Article 63. https://doi.org/10.3847/0004-637X/823/1/63

@article{e3b706ec8e58417a9e1035503a94dd47,

title = "The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448",

abstract = "The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters.We measure the proper motion of NGC 6558 μcl(N, E)=(+0.36 ± 0.10,+1.42 ± 0.10) mas yr-1) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.",

keywords = "Globular clusters: individual: NGC6558, Gravitational lensing: micro, Planets and satellites: detection, Proper motions",

author = "Rados{\l}aw Poleski and Wei Zhu and Christie, {Grant W.} and Andrzej Udalski and Andrew Gould and Etienne Bachelet and Jesper Skottfelt and {Calchi Novati}, Sebastiano and Szyma{\'n}ski, {M. K.} and I. Soszy{\'n}ski and G. Pietrzy{\'n}ski and {\L}. Wyrzykowski and K. Ulaczyk and P. Pietrukowicz and Szymon Koz{\l}owski and J. Skowron and P. Mr{\'o}z and M. Pawlak and C. Beichman and G. Bryden and S. Carey and M. Fausnaugh and Gaudi, {B. S.} and Henderson, {C. B.} and Pogge, {R. W.} and Y. Shvartzvald and B. Wibking and Yee, {J. C.} and Beatty, {T. G.} and Eastman, {J. D.} and J. Drummond and M. Friedmann and M. Henderson and Johnson, {J. A.} and S. Kaspi and D. Maoz and J. McCormick and N. McCrady and T. Natusch and H. Ngan and I. Porritt and Relles, {H. M.} and Sliski, {D. H.} and T.-G. Tan and Wittenmyer, {R. A.} and Wright, {J. T.} and Street, {R. A.} and Y. Tsapras and Bramich, {D. M.} and K. Horne and C. Snodgrass and Steele, {I. A.} and J. Menzies and {Figuera Jaimes}, R. and J. Wambsganss and R. Schmidt and A. Cassan and C. Ranc and S. Mao and V. Bozza and M. Dominik and Hundertmark, {M. P. G.} and J{\o}rgensen, {U. G.} and Andersen, {M. I.} and Burgdorf, {M. J.} and S. Ciceri and G. D{\textquoteright}Ago and Evans, {D. F.} and S.-H. Gu and Hinse, {T. C.} and N. Kains and E. Kerins and H. Korhonen and M. Kuffmeier and L. Mancini and A. Popovas and M. Rabus and S. Rahvar and Rasmussen, {R. T.} and G. Scarpetta and J. Southworth and J. Surdej and E. Unda-Sanzana and P. Verma and {von Essen}, C. and Y.-B. Wang and O. Wertz",

year = "2016",

month = may,

day = "20",

doi = "10.3847/0004-637X/823/1/63",

language = "English",

volume = "823",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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Poleski, R, Zhu, W, Christie, GW, Udalski, A, Gould, A, Bachelet, E, Skottfelt, J, Calchi Novati, S, Szymański, MK, Soszyński, I, Pietrzyński, G, Wyrzykowski, Ł, Ulaczyk, K, Pietrukowicz, P, Kozłowski, S, Skowron, J, Mróz, P, Pawlak, M, Beichman, C, Bryden, G, Carey, S, Fausnaugh, M, Gaudi, BS, Henderson, CB, Pogge, RW, Shvartzvald, Y, Wibking, B, Yee, JC, Beatty, TG, Eastman, JD, Drummond, J, Friedmann, M, Henderson, M, Johnson, JA, Kaspi, S, Maoz, D, McCormick, J, McCrady, N, Natusch, T, Ngan, H, Porritt, I, Relles, HM, Sliski, DH, Tan, T-G, Wittenmyer, RA, Wright, JT, Street, RA, Tsapras, Y, Bramich, DM, Horne, K, Snodgrass, C, Steele, IA, Menzies, J, Figuera Jaimes, R, Wambsganss, J, Schmidt, R, Cassan, A, Ranc, C, Mao, S, Bozza, V, Dominik, M, Hundertmark, MPG, Jørgensen, UG, Andersen, MI, Burgdorf, MJ, Ciceri, S, D’Ago, G, Evans, DF, Gu, S-H, Hinse, TC, Kains, N, Kerins, E, Korhonen, H, Kuffmeier, M, Mancini, L, Popovas, A, Rabus, M, Rahvar, S, Rasmussen, RT, Scarpetta, G, Southworth, J, Surdej, J, Unda-Sanzana, E, Verma, P, von Essen, C, Wang, Y-B & Wertz, O 2016, 'The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448', Astrophysical Journal, vol. 823, no. 1, 63. https://doi.org/10.3847/0004-637X/823/1/63

TY - JOUR

T1 - The Spitzer microlensing program as a probe for globular cluster planets

T2 - analysis of OGLE-2015-BLG-0448

AU - Poleski, Radosław

AU - Zhu, Wei

AU - Christie, Grant W.

AU - Udalski, Andrzej

AU - Gould, Andrew

AU - Bachelet, Etienne

AU - Skottfelt, Jesper

AU - Calchi Novati, Sebastiano

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Pietrzyński, G.

AU - Wyrzykowski, Ł.

AU - Ulaczyk, K.

AU - Pietrukowicz, P.

AU - Kozłowski, Szymon

AU - Skowron, J.

AU - Mróz, P.

AU - Pawlak, M.

AU - Beichman, C.

AU - Bryden, G.

AU - Carey, S.

AU - Fausnaugh, M.

AU - Gaudi, B. S.

AU - Henderson, C. B.

AU - Pogge, R. W.

AU - Shvartzvald, Y.

AU - Wibking, B.

AU - Yee, J. C.

AU - Beatty, T. G.

AU - Eastman, J. D.

AU - Drummond, J.

AU - Friedmann, M.

AU - Henderson, M.

AU - Johnson, J. A.

AU - Kaspi, S.

AU - Maoz, D.

AU - McCormick, J.

AU - McCrady, N.

AU - Natusch, T.

AU - Ngan, H.

AU - Porritt, I.

AU - Relles, H. M.

AU - Sliski, D. H.

AU - Tan, T.-G.

AU - Wittenmyer, R. A.

AU - Wright, J. T.

AU - Street, R. A.

AU - Tsapras, Y.

AU - Bramich, D. M.

AU - Horne, K.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Menzies, J.

AU - Figuera Jaimes, R.

AU - Wambsganss, J.

AU - Schmidt, R.

AU - Cassan, A.

AU - Ranc, C.

AU - Mao, S.

AU - Bozza, V.

AU - Dominik, M.

AU - Hundertmark, M. P. G.

AU - Jørgensen, U. G.

AU - Andersen, M. I.

AU - Burgdorf, M. J.

AU - Ciceri, S.

AU - D’Ago, G.

AU - Evans, D. F.

AU - Gu, S.-H.

AU - Hinse, T. C.

AU - Kains, N.

AU - Kerins, E.

AU - Korhonen, H.

AU - Kuffmeier, M.

AU - Mancini, L.

AU - Popovas, A.

AU - Rabus, M.

AU - Rahvar, S.

AU - Rasmussen, R. T.

AU - Scarpetta, G.

AU - Southworth, J.

AU - Surdej, J.

AU - Unda-Sanzana, E.

AU - Verma, P.

AU - von Essen, C.

AU - Wang, Y.-B.

AU - Wertz, O.

PY - 2016/5/20

Y1 - 2016/5/20

N2 - The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters.We measure the proper motion of NGC 6558 μcl(N, E)=(+0.36 ± 0.10,+1.42 ± 0.10) mas yr-1) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.

AB - The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters.We measure the proper motion of NGC 6558 μcl(N, E)=(+0.36 ± 0.10,+1.42 ± 0.10) mas yr-1) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.

KW - Globular clusters: individual: NGC6558

KW - Gravitational lensing: micro

KW - Planets and satellites: detection

KW - Proper motions

U2 - 10.3847/0004-637X/823/1/63

DO - 10.3847/0004-637X/823/1/63

M3 - Article

SN - 0004-637X

VL - 823

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 63

ER -

The Spitzer microlensing program as a probe for globular cluster planets: analysis of OGLE-2015-BLG-0448

Abstract

Keywords

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