Josephs, Marina

[["dc.bibliographiccitation.artnumber","A10"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","549"],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Jorgensen, G."],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Burgdorf, M. J."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Fang, X.-S."],["dc.contributor.author","Finet, F."],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Gu, S.-H"],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Jessen-Hansen, J."],["dc.contributor.author","Kains, N."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Kjeldsen, Hans"],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Lund, Mikkel N."],["dc.contributor.author","Lundkvist, Mia S."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Nesvorny, D."],["dc.contributor.author","Nikolov, N."],["dc.contributor.author","Penny, M. T."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Schäfer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Skottfelt, J."],["dc.contributor.author","Surdej, J."],["dc.contributor.author","Tregloan-Reed, Jeremy"],["dc.contributor.author","Wertz, O."],["dc.date.accessioned","2018-11-07T09:30:33Z"],["dc.date.available","2018-11-07T09:30:33Z"],["dc.date.issued","2013"],["dc.description.abstract","Aims. We present 11 high-precision photometric transit observations of the transiting super-Earth planet GJ 1214 b. Combining these data with observations from other authors, we investigate the ephemeris for possible signs of transit timing variations (TTVs) using a Bayesian approach. Methods. The observations were obtained using telescope-defocusing techinques, and achieve a high precision with random errors in the photometry as low as 1 mmag per point. To investigate the possiblity of TTVs in the light curve, we calculate the overall probability of a TTV signal using Bayesian methods. Results. The observations are used to determine the photometric parameters and the physical properties of the GJ 1214 system. Our results are in good agreement with published values. Individual times of mid-transit are measured with uncertainites as low as 10 s, allowing us to reduce the uncertainity in the orbital period by a factor or two. Conclusions. A Bayesian analysis reveals that it is highly improbable that the observed transit times is explained by TTV caused by a planet in the nominal habitable zone, when compared with the simpler alternative of a linear ephemeris."],["dc.identifier.doi","10.1051/0004-6361/201219996"],["dc.identifier.isi","000313745000010"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9960"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31333"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A8"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","527"],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Jorgensen, U. G."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Burgdorf, M. J."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dreizler, Stefan"],["dc.contributor.author","Finet, F."],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Hellier, C."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Kains, N."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Penny, M. T."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Schaefer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Surdej, J."],["dc.date.accessioned","2018-11-07T08:59:00Z"],["dc.date.available","2018-11-07T08:59:00Z"],["dc.date.issued","2011"],["dc.description.abstract","We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68 mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought. The planet has a significantly larger radius (1.330 +/- 0.093 R(Jup) versus 0.915(-0.040)(+0.046) R(Jup)) and much lower density (0.41 +/- 0.10 rho(Jup) versus 1.26(-0.21)(+0.25) rho(Jup)) and surface gravity (13.4 +/- 2.6 ms(-2) versus 26.4(-4.0)(+4.4) ms(-2)) than previous measurements showed. Based on the revised properties it is no longer an outlier in planetary mass-radius and period-gravity diagrams. We also obtain a more precise transit ephemeris for the WASP-7 system."],["dc.identifier.doi","10.1051/0004-6361/201016183"],["dc.identifier.fs","590497"],["dc.identifier.isi","000287484100023"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8600"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/23783"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","A much lower density for the transiting extrasolar planet WASP-7"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1300"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Monthly Notices of the Royal Astronomical Society"],["dc.bibliographiccitation.lastpage","1308"],["dc.bibliographiccitation.volume","434"],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Burgdorf, M. J."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Jorgensen, U. G."],["dc.contributor.author","Kains, N."],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Schaefer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Tregloan-Reed, Jeremy"],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Chen, G."],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dreizler, Stefan"],["dc.contributor.author","Fang, X.-S."],["dc.contributor.author","Finet, F."],["dc.contributor.author","Gu, S.-H."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Henning, T. H."],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Jessen-Hansen, J."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Kjeldsen, Hans"],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Lund, Mikkel N."],["dc.contributor.author","Lundkvist, Mia S."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Nikolov, N."],["dc.contributor.author","Penny, M. T."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Skottfelt, J."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Surdej, J."],["dc.contributor.author","Wertz, O."],["dc.date.accessioned","2018-11-07T09:20:38Z"],["dc.date.available","2018-11-07T09:20:38Z"],["dc.date.issued","2013"],["dc.description.abstract","We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers. Our new data for WASP-15 comprise observations of one transit simultaneously in four optical passbands using GROND on the MPG/European Southern Observatory (ESO) 2.2 m telescope, plus coverage of half a transit from DFOSC on the Danish 1.54 m telescope, both at ESO La Silla. For WASP-16 we present observations of four complete transits, all from the Danish telescope. We use these new data to refine the measured physical properties and orbital ephemerides of the two systems. Whilst our results are close to the originally determined values for WASP-15, we find that the star and planet in the WASP-16 system are both larger and less massive than previously thought."],["dc.identifier.doi","10.1093/mnras/stt1089"],["dc.identifier.isi","000323638200026"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28927"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","0035-8711"],["dc.title","High-precision photometry by telescope defocusing - V. WASP-15 and WASP-16"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A49"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","597"],["dc.contributor.author","Giannini, Edward H."],["dc.contributor.author","Schmidt, R. W."],["dc.contributor.author","Wambsganss, J."],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Andersen, J. M."],["dc.contributor.author","Anguita, T."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Bramich, D. M."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Damerdji, Y."],["dc.contributor.author","Diehl, Claudia"],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Elyiv, A."],["dc.contributor.author","Fang, X."],["dc.contributor.author","Jaimes, R. Figuera"],["dc.contributor.author","Finet, F."],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Gu, S."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Hornstrup, A."],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Jessen-Hansen, J."],["dc.contributor.author","Jorgensen, U. G."],["dc.contributor.author","Juncher, D."],["dc.contributor.author","Kains, N."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Korhonen, H."],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Lund, Mikkel N."],["dc.contributor.author","Lundkvist, M. S."],["dc.contributor.author","Maier, Gerrit Steffen"],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Masi, G."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Penny, M."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Rabus, M."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Schäfer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Skottfelt, J."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Surdej, J."],["dc.contributor.author","Tregloan-Reed, Jeremy"],["dc.contributor.author","Vilela, C."],["dc.contributor.author","Wertz, O."],["dc.contributor.author","Zimmer, Frank"],["dc.date.accessioned","2018-11-07T10:29:12Z"],["dc.date.available","2018-11-07T10:29:12Z"],["dc.date.issued","2017"],["dc.description.abstract","Aims. We present V and R photometry of the gravitationally lensed quasars WFI 2033-4723 and HE 0047-1756. The data were taken by the MiNDSTEp collaboration with the 1.54 m Danish telescope at the ESO La Silla observatory from 2008 to 2012. Methods. Differential photometry has been carried out using the image subtraction method as implemented in the HOTPAnTS package, additionally using GALFIT for quasar photometry. Results. The quasar WFI 2033-4723 showed brightness variations of order 0.5 mag in V and R during the campaign. The two lensed components of quasar HE 0047-1756 varied by 0.2-0.3 mag within five years. We provide, for the first time, an estimate of the time delay of component B with respect to A of Delta t = (7.6 +/- 1.8) days for this object. We also find evidence for a secular evolution of the magnitude difference between components A and B in both filters, which we explain as due to a long-duration microlensing event. Finally we find that both quasars WFI 2033-4723 and HE 0047-1756 become bluer when brighter, which is consistent with previous studies."],["dc.identifier.doi","10.1051/0004-6361/201527422"],["dc.identifier.isi","000392392900016"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14293"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43589"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/268421/EU/Ice: Small and Near, Distant and Large. Understanding planet formation through observation of Solar-System minor bodies and extra-solar planets/iSANDAL"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/267864/EU/ASTERoseismic Investigations with SONG and Kepler/ASTERISK"],["dc.relation.issn","1432-0746"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","MiNDSTEp differential photometry of the gravitationally lensed quasars WFI 2033-4723 and HE0047-1756: microlensing and a new time delay"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","A104"],["dc.bibliographiccitation.journal","Astronomy and Astrophysics"],["dc.bibliographiccitation.volume","551"],["dc.contributor.author","Ricci, D."],["dc.contributor.author","Elyiv, A."],["dc.contributor.author","Finet, F."],["dc.contributor.author","Wertz, O."],["dc.contributor.author","Alsubai, K. A."],["dc.contributor.author","Anguita, T."],["dc.contributor.author","Bozza, V."],["dc.contributor.author","Browne, P."],["dc.contributor.author","Burgdorf, M. J."],["dc.contributor.author","Novati, S. Calchi"],["dc.contributor.author","Dodds, Peter N."],["dc.contributor.author","Dominik, M."],["dc.contributor.author","Dreizler, Stefan"],["dc.contributor.author","Gerner, T."],["dc.contributor.author","Glitrup, M."],["dc.contributor.author","Grundahl, F."],["dc.contributor.author","Hardis, S."],["dc.contributor.author","Harpsoe, K. B. W."],["dc.contributor.author","Hinse, Tobias C."],["dc.contributor.author","Hornstrup, A."],["dc.contributor.author","Hundertmark, Markus"],["dc.contributor.author","Jorgensen, U. G."],["dc.contributor.author","Kains, N."],["dc.contributor.author","Kerins, E."],["dc.contributor.author","Liebig, C."],["dc.contributor.author","Maier, Gerrit Steffen"],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Masi, G."],["dc.contributor.author","Mathiasen, M."],["dc.contributor.author","Penny, M."],["dc.contributor.author","Proft, S."],["dc.contributor.author","Rahvar, S."],["dc.contributor.author","Scarpetta, G."],["dc.contributor.author","Sahu, K. C."],["dc.contributor.author","Schäfer, S."],["dc.contributor.author","Schoenebeck, F."],["dc.contributor.author","Schmidt, R."],["dc.contributor.author","Skottfelt, J."],["dc.contributor.author","Snodgrass, Colin"],["dc.contributor.author","Southworth, John"],["dc.contributor.author","Thoene, C. C."],["dc.contributor.author","Wambsganss, J."],["dc.contributor.author","Zimmer, Frank"],["dc.contributor.author","Zub, M."],["dc.contributor.author","Surdej, J."],["dc.date.accessioned","2018-11-07T09:27:19Z"],["dc.date.available","2018-11-07T09:27:19Z"],["dc.date.issued","2013"],["dc.description.abstract","Aims. With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multiepoch and multiband photometric observations with the Danish 1.54 m telescope at the La Silla Observatory. Methods. The observations were carried out in the VRi spectral bands during four seasons (2008-2011). We reduced the data using the point spread function photometric technique as well as aperture photometry. Results. Our results show for the brightest lensed component some significant decrease in flux between the first two seasons (+0.09/+0.11/+0.05 mag) and a subsequent increase during the following ones (-0.11/-0.11/-0.10 mag) in the V/R/i spectral bands, respectively. Comparing our results with previous studies, we find smaller color variations between these seasons as compared with previous ones. We also separate the contribution of the lensing galaxy from that of the fainter and close lensed component."],["dc.identifier.doi","10.1051/0004-6361/201118755"],["dc.identifier.fs","602625"],["dc.identifier.isi","000316460600104"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10025"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30509"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/283783/EU//GLORIA"],["dc.relation.issn","0004-6361"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Flux and color variations of the doubly imaged quasar UM673"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]