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Spitzer Observations Of Ogle-2015-blg-1212 Reveal A New Path Toward Breaking Strong Microlens Degeneracies

Bozza, V.; Shvartzvald, Y.; Udalski, A.; Calchi Novati, S.; Bond, I.A.; Han, C.; Hundertmark, M.; Poleski, R.; Pawlak, M.; Szymański, M.K.; Skowron, J.; Mróz, P.; Kozłowski, S.; Wyrzykowski, Ł.; 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, T.; Sharan, A.; Sullivan, D.J.; Sumi, T.; Suzuki, D.; Tristram, P.J.; Wakiyama, Y.; Yonehara, A.; -Y. Choi, J.; Park, H.; Jung, Y.K.; -G. Shin, I.; Albrow, M.D.; -G. Park, B.; -L. Kim, S.; -U. Lee, C.; -M. Cha, S.; -J. Kim, D.; Lee, Y.; Dominik, M.; Jørgensen, U.G.; Andersen, M.I.; Bramich, D.M.; Burgdorf, M.J.; Ciceri, S.;...

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Authors

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

Ł. Wyrzykowski

P. Pietrukowicz

I. Soszyński

K. Ulaczyk

C. Beichman

G. Bryden

S. Carey

M. 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

T. 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. Surdej

E. Unda-Sanzana

C. von Essen

Y. -B. Wang

O. Wertz

D. Maoz

M. Friedmann

S. Kaspi



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.

Journal Article Type Article
Acceptance Date Feb 9, 2016
Online Publication Date Mar 21, 2016
Publication Date Mar 20, 2016
Publicly Available Date Mar 29, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 820
Issue 1
Article Number 79
DOI https://doi.org/10.3847/0004-637x/820/1/79
Keywords binaries, general, Galaxy, bulge, gravitational lensing, micro, planets and satellites, detection, space vehicles
Publisher URL http://dx.doi.org/10.3847/0004-637x/820/1/79

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