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.; D'Ago, G.; Evans, D.F.; Figuera Jaimes, R.; -H. Gu, S.; 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.; -B. Wang, Y.; Wertz, O.; Maoz, D.; Friedmann, M.; Kaspi, S.

doi: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.; 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.;...

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

Dr John Taylor j.k.taylor@keele.ac.uk

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
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