SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES

V. Bozza, Y. Shvartzvald, A. Udalski, S. Calchi Novati, I. A. Bond, C. Han, M. Hundertmark, R. Poleski, M. Pawlak, M. K. Szymański, J. Skowron, P. Mróz, S. Kozłowski, Wyrzykowski, P. Pietrukowicz, I. Soszyński, K. Ulaczyk, C. Beichman, G. Bryden, S. CareyM. Fausnaugh, B. S. Gaudi, A. Gould, C. B. Henderson, R. W. Pogge, B. Wibking, J. C. Yee, W. Zhu, F. Abe, Y. Asakura, R. K. Barry, D. P. Bennett, A. Bhattacharya, M. Donachie, M. Freeman, A. Fukui, Y. Hirao, K. Inayama, Y. Itow, N. Koshimoto, M. C A Li, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, M. Nagakane, T. Nishioka, K. Ohnishi, H. Oyokawa, N. Rattenbury, To Saito, A. Sharan, D. J. Sullivan, T. Sumi, D. Suzuki, P. J. Tristram, Y. Wakiyama, A. Yonehara, J. Y. Choi, H. Park, Y. K. Jung, I. G. Shin, M. D. Albrow, B. G. Park, S. L. Kim, C. U. Lee, S. M. Cha, D. J. Kim, Y. Lee, M. Dominik, U. G. JØrgensen, M. I. Andersen, D. M. Bramich, M. J. Burgdorf, S. Ciceri, G. D'Ago, D. F. Evans, R. Figuera Jaimes, 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. Skottfelt, C. Snodgrass, J. Southworth, J. Surdej, E. Unda-Sanzana, C. Von Essen, Y. B. Wang, O. Wertz, D. Maoz, M. Friedmann, S. Kaspi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively break a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.

Original languageEnglish
Article number79
JournalAstrophysical Journal
Volume820
Issue number1
DOIs
Publication statusPublished - 20 Mar 2016
Externally publishedYes

Fingerprint

parallax
lenses
galaxies
parameter
ruling

Keywords

  • binaries: general
  • Galaxy: bulge
  • gravitational lensing: micro
  • planets and satellites: detection
  • space vehicles

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bozza, V., Shvartzvald, Y., Udalski, A., Novati, S. C., Bond, I. A., Han, C., ... Kaspi, S. (2016). SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES. Astrophysical Journal, 820(1), [79]. https://doi.org/10.3847/0004-637X/820/1/79

SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES. / Bozza, V.; Shvartzvald, Y.; Udalski, A.; Novati, S. Calchi; Bond, I. A.; Han, C.; Hundertmark, M.; Poleski, R.; Pawlak, M.; Szymański, M. K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Wyrzykowski; Pietrukowicz, P.; Soszyński, I.; Ulaczyk, K.; Beichman, C.; Bryden, G.; Carey, S.; Fausnaugh, M.; Gaudi, B. S.; Gould, A.; Henderson, C. B.; Pogge, R. W.; Wibking, B.; Yee, J. C.; Zhu, W.; Abe, F.; Asakura, Y.; Barry, R. K.; Bennett, D. P.; Bhattacharya, A.; Donachie, M.; Freeman, M.; Fukui, A.; Hirao, Y.; Inayama, K.; Itow, Y.; Koshimoto, N.; Li, M. C A; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Nagakane, M.; Nishioka, T.; Ohnishi, K.; Oyokawa, H.; Rattenbury, N.; Saito, To; Sharan, A.; Sullivan, D. J.; Sumi, T.; Suzuki, D.; Tristram, P. J.; Wakiyama, Y.; Yonehara, A.; Choi, J. Y.; Park, H.; Jung, Y. K.; Shin, I. G.; Albrow, M. D.; Park, B. G.; Kim, S. L.; Lee, C. U.; Cha, S. M.; Kim, D. J.; Lee, Y.; Dominik, M.; JØrgensen, U. G.; Andersen, M. I.; Bramich, D. M.; Burgdorf, M. J.; Ciceri, S.; D'Ago, G.; Evans, D. F.; Jaimes, R. Figuera; Gu, S. H.; Hinse, T. C.; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Popovas, A.; Rabus, M.; Rahvar, S.; Rasmussen, R. T.; Scarpetta, G.; Skottfelt, J.; Snodgrass, C.; Southworth, J.; Surdej, J.; Unda-Sanzana, E.; Von Essen, C.; Wang, Y. B.; Wertz, O.; Maoz, D.; Friedmann, M.; Kaspi, S.

In: Astrophysical Journal, Vol. 820, No. 1, 79, 20.03.2016.

Research output: Contribution to journalArticle

Bozza, V, Shvartzvald, Y, Udalski, A, Novati, SC, Bond, IA, Han, C, Hundertmark, M, Poleski, R, Pawlak, M, Szymański, MK, Skowron, J, Mróz, P, Kozłowski, S, Wyrzykowski, Pietrukowicz, P, Soszyński, I, Ulaczyk, K, Beichman, C, Bryden, G, Carey, S, Fausnaugh, M, Gaudi, BS, Gould, A, Henderson, CB, Pogge, RW, Wibking, B, Yee, JC, Zhu, W, Abe, F, Asakura, Y, Barry, RK, Bennett, DP, Bhattacharya, A, Donachie, M, Freeman, M, Fukui, A, Hirao, Y, Inayama, K, Itow, Y, Koshimoto, N, Li, MCA, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Nagakane, M, Nishioka, T, Ohnishi, K, Oyokawa, H, Rattenbury, N, Saito, T, Sharan, A, Sullivan, DJ, Sumi, T, Suzuki, D, Tristram, PJ, Wakiyama, Y, Yonehara, A, Choi, JY, Park, H, Jung, YK, Shin, IG, Albrow, MD, Park, BG, Kim, SL, Lee, CU, Cha, SM, Kim, DJ, Lee, Y, Dominik, M, JØrgensen, UG, Andersen, MI, Bramich, DM, Burgdorf, MJ, Ciceri, S, D'Ago, G, Evans, DF, Jaimes, RF, Gu, SH, Hinse, TC, Kains, N, Kerins, E, Korhonen, H, Kuffmeier, M, Mancini, L, Popovas, A, Rabus, M, Rahvar, S, Rasmussen, RT, Scarpetta, G, Skottfelt, J, Snodgrass, C, Southworth, J, Surdej, J, Unda-Sanzana, E, Von Essen, C, Wang, YB, Wertz, O, Maoz, D, Friedmann, M & Kaspi, S 2016, 'SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES', Astrophysical Journal, vol. 820, no. 1, 79. https://doi.org/10.3847/0004-637X/820/1/79
Bozza, V. ; Shvartzvald, Y. ; Udalski, A. ; Novati, S. Calchi ; Bond, I. A. ; Han, C. ; Hundertmark, M. ; Poleski, R. ; Pawlak, M. ; Szymański, M. K. ; Skowron, J. ; Mróz, P. ; Kozłowski, S. ; Wyrzykowski ; Pietrukowicz, P. ; Soszyński, I. ; Ulaczyk, K. ; Beichman, C. ; Bryden, G. ; Carey, S. ; Fausnaugh, M. ; Gaudi, B. S. ; Gould, A. ; Henderson, C. B. ; Pogge, R. W. ; Wibking, B. ; Yee, J. C. ; Zhu, W. ; Abe, F. ; Asakura, Y. ; Barry, R. K. ; Bennett, D. P. ; Bhattacharya, A. ; Donachie, M. ; Freeman, M. ; Fukui, A. ; Hirao, Y. ; Inayama, K. ; Itow, Y. ; Koshimoto, N. ; Li, M. C A ; Ling, C. H. ; Masuda, K. ; Matsubara, Y. ; Muraki, Y. ; Nagakane, M. ; Nishioka, T. ; Ohnishi, K. ; Oyokawa, H. ; Rattenbury, N. ; Saito, To ; Sharan, A. ; Sullivan, D. J. ; Sumi, T. ; Suzuki, D. ; Tristram, P. J. ; Wakiyama, Y. ; Yonehara, A. ; Choi, J. Y. ; Park, H. ; Jung, Y. K. ; Shin, I. G. ; Albrow, M. D. ; Park, B. G. ; Kim, S. L. ; Lee, C. U. ; Cha, S. M. ; Kim, D. J. ; Lee, Y. ; Dominik, M. ; JØrgensen, U. G. ; Andersen, M. I. ; Bramich, D. M. ; Burgdorf, M. J. ; Ciceri, S. ; D'Ago, G. ; Evans, D. F. ; Jaimes, R. Figuera ; Gu, S. H. ; Hinse, T. C. ; Kains, N. ; Kerins, E. ; Korhonen, H. ; Kuffmeier, M. ; Mancini, L. ; Popovas, A. ; Rabus, M. ; Rahvar, S. ; Rasmussen, R. T. ; Scarpetta, G. ; Skottfelt, J. ; Snodgrass, C. ; Southworth, J. ; Surdej, J. ; Unda-Sanzana, E. ; Von Essen, C. ; Wang, Y. B. ; Wertz, O. ; Maoz, D. ; Friedmann, M. ; Kaspi, S. / SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES. In: Astrophysical Journal. 2016 ; Vol. 820, No. 1.
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abstract = "Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively break a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.",
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T1 - SPITZER OBSERVATIONS of OGLE-2015-BLG-1212 REVEAL A NEW PATH TOWARD BREAKING STRONG MICROLENS DEGENERACIES

AU - Bozza, V.

AU - Shvartzvald, Y.

AU - Udalski, A.

AU - Novati, S. Calchi

AU - Bond, I. A.

AU - Han, C.

AU - Hundertmark, M.

AU - Poleski, R.

AU - Pawlak, M.

AU - Szymański, M. K.

AU - Skowron, J.

AU - Mróz, P.

AU - Kozłowski, S.

AU - Wyrzykowski,

AU - Pietrukowicz, P.

AU - Soszyński, I.

AU - Ulaczyk, K.

AU - Beichman, C.

AU - Bryden, G.

AU - Carey, S.

AU - Fausnaugh, M.

AU - Gaudi, B. S.

AU - Gould, A.

AU - Henderson, C. B.

AU - Pogge, R. W.

AU - Wibking, B.

AU - Yee, J. C.

AU - Zhu, W.

AU - Abe, F.

AU - Asakura, Y.

AU - Barry, R. K.

AU - Bennett, D. P.

AU - Bhattacharya, A.

AU - Donachie, M.

AU - Freeman, M.

AU - Fukui, A.

AU - Hirao, Y.

AU - Inayama, K.

AU - Itow, Y.

AU - Koshimoto, N.

AU - Li, M. C A

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Muraki, Y.

AU - Nagakane, M.

AU - Nishioka, T.

AU - Ohnishi, K.

AU - Oyokawa, H.

AU - Rattenbury, N.

AU - Saito, To

AU - Sharan, A.

AU - Sullivan, D. J.

AU - Sumi, T.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Wakiyama, Y.

AU - Yonehara, A.

AU - Choi, J. Y.

AU - Park, H.

AU - Jung, Y. K.

AU - Shin, I. G.

AU - Albrow, M. D.

AU - Park, B. G.

AU - Kim, S. L.

AU - Lee, C. U.

AU - Cha, S. M.

AU - Kim, D. J.

AU - Lee, Y.

AU - Dominik, M.

AU - JØrgensen, U. G.

AU - Andersen, M. I.

AU - Bramich, D. M.

AU - Burgdorf, M. J.

AU - Ciceri, S.

AU - D'Ago, G.

AU - Evans, D. F.

AU - Jaimes, R. Figuera

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 - Skottfelt, J.

AU - Snodgrass, C.

AU - Southworth, J.

AU - Surdej, J.

AU - Unda-Sanzana, E.

AU - Von Essen, C.

AU - Wang, Y. B.

AU - Wertz, O.

AU - Maoz, D.

AU - Friedmann, M.

AU - Kaspi, S.

PY - 2016/3/20

Y1 - 2016/3/20

N2 - Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively break a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.

AB - Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively break a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.

KW - binaries: general

KW - Galaxy: bulge

KW - gravitational lensing: micro

KW - planets and satellites: detection

KW - space vehicles

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