A hallowed part of the scientific method, papers are where discoveries are announced and described.
2012 |
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| 8. | Shin, I.-G., Han, C., Gould, A., Udalski, A., Sumi, T., Dominik, M., Beaulieu, J.-P., Tsapras, Y., Bozza, V., Szymański, M. K., Kubiak, M., Soszyński, I., Pietrzyński, G., Poleski, R., Ulaczyk, K., Pietrukowicz, P., Kozłowski, S., Skowron, J., Wyrzykowski, Ł, Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Furusawa, K., Hayashi, F., Hearnshaw, J. B., Hosaka, S., Itow, Y., Kamiya, K., Kilmartin, P. M., Kobara, S., Korpela, A., Lin, W., Ling, C. H., Makita, S., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Nagaya, M., Nishimoto, K., Ohnishi, K., Okumura, T., Omori, K., Perrott, Y. C., Rattenbury, N., Saito, To, Skuljan, L., Sullivan, D. J., Suzuki, D., Sweatman, W. L., Tristram, P. J., Wada, K., Yock, P. C. M., Christie, G. W., Depoy, D. L., Dong, S., Gal-Yam, A., Gaudi, B. S., Hung, L.-W., Janczak, J., Kaspi, S., Maoz, D., McCormick, J., McGregor, D., Moorhouse, D., Muñoz, J. A., Natusch, T., Nelson, C., Pogge, R. W., Tan, T.-G., Polishook, D., Shvartzvald, Y., Shporer, A., Thornley, G., Malamud, U., Yee, J. C., Choi, J.-Y., Jung, Y.-K., Park, H., Lee, C.-U., Park, B.-G., Koo, J.-R., Bajek, D., Bramich, D. M., Browne, P., Horne, K., Ipatov, S., Snodgrass, C., Steele, I., Street, R., Alsubai, K. A., Burgdorf, M. J., Novati, S. Calchi, Dodds, P., Dreizler, S., Fang, X.-S., Grundahl, F., Gu, C.-H., Hardis, S., Harpsøe, K., Hinse, T. C., Hundertmark, M., Jessen-Hansen, J., Jørgensen, U. G., Kains, N., Kerins, E., Liebig, C., Lund, M., Lundkvist, M., Mancini, L., Mathiasen, M., Hornstrup, A., Penny, M. T., Proft, S., Rahvar, S., Ricci, D., Scarpetta, G., Skottfelt, J., Southworth, J., Surdej, J., Tregloan-Reed, J., Wertz, O., Zimmer, F., Albrow, M. D., Batista, V., Brillant, S., Caldwell, J. A. R., Calitz, J. J., Cassan, A., Cole, A., Cook, K. H., Corrales, E., Coutures, Ch, Dieters, S., Prester, D. Dominis, Donatowicz, J., Fouqué, P., Greenhill, J., Hill, K., Hoffman, M., Kane, S. R., Kubas, D., Marquette, J.-B., Martin, R., Meintjes, P., Menzies, J., Pollard, K. R., Sahu, K. C., Wambsganss, J., Williams, A., Vinter, C., Zub, M. Microlensig Binaries with Candidate Brown Dwarf Companions Journal Article The Astrophysical Journal, 760 (2), pp. 116, 2012, ISSN: 0004-637X, 1538-4357, (arXiv: 1208.2323). @article{shin_microlensig_2012, title = {Microlensig Binaries with Candidate Brown Dwarf Companions}, author = {Shin, I.-G. and Han, C. and Gould, A. and Udalski, A. and Sumi, T. and Dominik, M. and Beaulieu, J.-P. and Tsapras, Y. and Bozza, V. and Szymański, M. K. and Kubiak, M. and Soszyński, I. and Pietrzyński, G. and Poleski, R. and Ulaczyk, K. and Pietrukowicz, P. and Kozłowski, S. and Skowron, J. and Wyrzykowski, Ł and Abe, F. and Bennett, D. P. and Bond, I. A. and Botzler, C. S. and Freeman, M. and Fukui, A. and Furusawa, K. and Hayashi, F. and Hearnshaw, J. B. and Hosaka, S. and Itow, Y. and Kamiya, K. and Kilmartin, P. M. and Kobara, S. and Korpela, A. and Lin, W. and Ling, C. H. and Makita, S. and Masuda, K. and Matsubara, Y. and Miyake, N. and Muraki, Y. and Nagaya, M. and Nishimoto, K. and Ohnishi, K. and Okumura, T. and Omori, K. and Perrott, Y. C. and Rattenbury, N. and Saito, To and Skuljan, L. and Sullivan, D. J. and Suzuki, D. and Sweatman, W. L. and Tristram, P. J. and Wada, K. and Yock, P. C. M. and Christie, G. W. and Depoy, D. L. and Dong, S. and Gal-Yam, A. and Gaudi, B. S. and Hung, L.-W. and Janczak, J. and Kaspi, S. and Maoz, D. and McCormick, J. and McGregor, D. and Moorhouse, D. and Muñoz, J. A. and Natusch, T. and Nelson, C. and Pogge, R. W. and Tan, T.-G. and Polishook, D. and Shvartzvald, Y. and Shporer, A. and Thornley, G. and Malamud, U. and Yee, J. C. and Choi, J.-Y. and Jung, Y.-K. and Park, H. and Lee, C.-U. and Park, B.-G. and Koo, J.-R. and Bajek, D. and Bramich, D. M. and Browne, P. and Horne, K. and Ipatov, S. and Snodgrass, C. and Steele, I. and Street, R. and Alsubai, K. A. and Burgdorf, M. J. and Novati, S. Calchi and Dodds, P. and Dreizler, S. and Fang, X.-S. and Grundahl, F. and Gu, C.-H. and Hardis, S. and Harpsøe, K. and Hinse, T. C. and Hundertmark, M. and Jessen-Hansen, J. and Jørgensen, U. G. and Kains, N. and Kerins, E. and Liebig, C. and Lund, M. and Lundkvist, M. and Mancini, L. and Mathiasen, M. and Hornstrup, A. and Penny, M. T. and Proft, S. and Rahvar, S. and Ricci, D. and Scarpetta, G. and Skottfelt, J. and Southworth, J. and Surdej, J. and Tregloan-Reed, J. and Wertz, O. and Zimmer, F. and Albrow, M. D. and Batista, V. and Brillant, S. and Caldwell, J. A. R. and Calitz, J. J. and Cassan, A. and Cole, A. and Cook, K. H. and Corrales, E. and Coutures, Ch and Dieters, S. and Prester, D. Dominis and Donatowicz, J. and Fouqué, P. and Greenhill, J. and Hill, K. and Hoffman, M. and Kane, S. R. and Kubas, D. and Marquette, J.-B. and Martin, R. and Meintjes, P. and Menzies, J. and Pollard, K. R. and Sahu, K. C. and Wambsganss, J. and Williams, A. and Vinter, C. and Zub, M.}, url = {http://arxiv.org/abs/1208.2323}, doi = {10.1088/0004-637X/760/2/116}, issn = {0004-637X, 1538-4357}, year = {2012}, date = {2012-12-01}, urldate = {2016-12-24}, journal = {The Astrophysical Journal}, volume = {760}, number = {2}, pages = {116}, abstract = {Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation history. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during 2004 - 2011 observation seasons. Based on the low mass ratio criterion of q textless 0.2, we found 7 candidate events, including OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured mass of the brown dwarf companions are (0.02 +/- 0.01) M_Sun and (0.019 +/- 0.002) M_Sun for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well covered light curves increases with new generation searches.}, note = {arXiv: 1208.2323}, keywords = {}, pubstate = {published}, tppubtype = {article} } Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation history. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during 2004 - 2011 observation seasons. Based on the low mass ratio criterion of q textless 0.2, we found 7 candidate events, including OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured mass of the brown dwarf companions are (0.02 +/- 0.01) M_Sun and (0.019 +/- 0.002) M_Sun for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well covered light curves increases with new generation searches. |
| 7. | Shin, I.-G., Han, C., Choi, J.-Y., Udalski, A., Sumi, T., Gould, A., Bozza, V., Dominik, M., Fouqué, P., Horne, K., M, Szymański, K., Kubiak, M., Soszyński, I., Pietrzyński, G., Poleski, R., Ulaczyk, K., Pietrukowicz, P., Kozłowski, S., Skowron, J., Wyrzykowski, Ł, Abe, F., Bennett, D. P., Bond, I. A., Botzler, C. S., Chote, P., Freeman, M., Fukui, A., Furusawa, K., Itow, Y., Kobara, S., Ling, C. H., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Ohmori, K., Ohnishi, K., Rattenbury, N. J., Saito, To, Sullivan, D. J., Suzuki, D., Suzuki, K., Sweatman, W. L., Takino, S., Tristram, P. J., Wada, K., Yock, P. C. M., Bramich, D. M., Snodgrass, C., Steele, I. A., Street, R. A., Tsapras, Y., Alsubai, K. A., Browne, P., Burgdorf, M. J., Novati, S. Calchi, Dodds, P., Dreizler, S., Fang, X.-S., Grundahl, F., Gu, C.-H., Hardis, S., Harpsøe, K., Hinse, T. C., Hornstrup, A., Hundertmark, M., Jessen-Hansen, J., Jørgensen, U. G., Kains, N., Kerins, E., Liebig, C., Lund, M., Lunkkvist, M., Mancini, L., Mathiasen, M., Penny, M. T., Rahvar, S., Ricci, D., Scarpetta, G., Skottfelt, J., Southworth, J., Surdej, J., Tregloan-Reed, J., Wambsganss, J., Wertz, O., Almeida, L. A., Batista, V., Christie, G., DePoy, D. L., Dong, Subo, Gaudi, B. S., Henderson, C., Jablonski, F., Lee, C.-U., McCormick, J., McGregor, D., Moorhouse, D., Natusch, T., Ngan, H., Park, S.-Y., Pogge, R. W., Tan, T.-G., Thornley, G., Yee, J. C., Albrow, M. D., Bachelet, E., Beaulieu, J.-P., Brillant, S., Cassan, A., Cole, A. A., Corrales, E., Coutures, C., Dieters, S., Prester, D. Dominis, Donatowicz, J., Greenhill, J., Kubas, D., Marquette, J.-B., Menzies, J. W., Sahu, K. C., Zub, M. Characterizing Low-Mass Binaries From Observation of Long Time-scale Caustic-crossing Gravitational Microlensing Events Journal Article The Astrophysical Journal, 755 (2), pp. 91, 2012, ISSN: 0004-637X, 1538-4357, (arXiv: 1204.2869). @article{shin_characterizing_2012, title = {Characterizing Low-Mass Binaries From Observation of Long Time-scale Caustic-crossing Gravitational Microlensing Events}, author = {Shin, I.-G. and Han, C. and Choi, J.-Y. and Udalski, A. and Sumi, T. and Gould, A. and Bozza, V. and Dominik, M. and Fouqué, P. and Horne, K. and M and Szymański, K. and Kubiak, M. and Soszyński, I. and Pietrzyński, G. and Poleski, R. and Ulaczyk, K. and Pietrukowicz, P. and Kozłowski, S. and Skowron, J. and Wyrzykowski, Ł and Abe, F. and Bennett, D. P. and Bond, I. A. and Botzler, C. S. and Chote, P. and Freeman, M. and Fukui, A. and Furusawa, K. and Itow, Y. and Kobara, S. and Ling, C. H. and Masuda, K. and Matsubara, Y. and Miyake, N. and Muraki, Y. and Ohmori, K. and Ohnishi, K. and Rattenbury, N. J. and Saito, To and Sullivan, D. J. and Suzuki, D. and Suzuki, K. and Sweatman, W. L. and Takino, S. and Tristram, P. J. and Wada, K. and Yock, P. C. M. and Bramich, D. M. and Snodgrass, C. and Steele, I. A. and Street, R. A. and Tsapras, Y. and Alsubai, K. A. and Browne, P. and Burgdorf, M. J. and Novati, S. Calchi and Dodds, P. and Dreizler, S. and Fang, X.-S. and Grundahl, F. and Gu, C.-H. and Hardis, S. and Harpsøe, K. and Hinse, T. C. and Hornstrup, A. and Hundertmark, M. and Jessen-Hansen, J. and Jørgensen, U. G. and Kains, N. and Kerins, E. and Liebig, C. and Lund, M. and Lunkkvist, M. and Mancini, L. and Mathiasen, M. and Penny, M. T. and Rahvar, S. and Ricci, D. and Scarpetta, G. and Skottfelt, J. and Southworth, J. and Surdej, J. and Tregloan-Reed, J. and Wambsganss, J. and Wertz, O. and Almeida, L. A. and Batista, V. and Christie, G. and DePoy, D. L. and Dong, Subo and Gaudi, B. S. and Henderson, C. and Jablonski, F. and Lee, C.-U. and McCormick, J. and McGregor, D. and Moorhouse, D. and Natusch, T. and Ngan, H. and Park, S.-Y. and Pogge, R. W. and Tan, T.-G. and Thornley, G. and Yee, J. C. and Albrow, M. D. and Bachelet, E. and Beaulieu, J.-P. and Brillant, S. and Cassan, A. and Cole, A. A. and Corrales, E. and Coutures, C. and Dieters, S. and Prester, D. Dominis and Donatowicz, J. and Greenhill, J. and Kubas, D. and Marquette, J.-B. and Menzies, J. W. and Sahu, K. C. and Zub, M.}, url = {http://arxiv.org/abs/1204.2869}, doi = {10.1088/0004-637X/755/2/91}, issn = {0004-637X, 1538-4357}, year = {2012}, date = {2012-08-01}, urldate = {2016-12-24}, journal = {The Astrophysical Journal}, volume = {755}, number = {2}, pages = {91}, abstract = {Despite astrophysical importance of binary star systems, detections are limited to those located in small ranges of separations, distances, and masses and thus it is necessary to use a variety of observational techniques for a complete view of stellar multiplicity across a broad range of physical parameters. In this paper, we report the detections and measurements of 2 binaries discovered from observations of microlensing events MOA-2011-BLG-090 and OGLE-2011-BLG-0417. Determinations of the binary masses are possible by simultaneously measuring the Einstein radius and the lens parallax. The measured masses of the binary components are 0.43 $M_textbackslashodot$ and 0.39 $M_textbackslashodot$ for MOA-2011-BLG-090 and 0.57 $M_textbackslashodot$ and 0.17 $M_textbackslashodot$ for OGLE-2011-BLG-0417 and thus both lens components of MOA-2011-BLG-090 and one component of OGLE-2011-BLG-0417 are M dwarfs, demonstrating the usefulness of microlensing in detecting binaries composed of low-mass components. From modeling of the light curves considering full Keplerian motion of the lens, we also measure the orbital parameters of the binaries. The blended light of OGLE-2011-BLG-0417 comes very likely from the lens itself, making it possible to check the microlensing orbital solution by follow-up radial-velocity observation. For both events, the caustic-crossing parts of the light curves, which are critical for determining the physical lens parameters, were resolved by high-cadence survey observations and thus it is expected that the number of microlensing binaries with measured physical parameters will increase in the future.}, note = {arXiv: 1204.2869}, keywords = {}, pubstate = {published}, tppubtype = {article} } Despite astrophysical importance of binary star systems, detections are limited to those located in small ranges of separations, distances, and masses and thus it is necessary to use a variety of observational techniques for a complete view of stellar multiplicity across a broad range of physical parameters. In this paper, we report the detections and measurements of 2 binaries discovered from observations of microlensing events MOA-2011-BLG-090 and OGLE-2011-BLG-0417. Determinations of the binary masses are possible by simultaneously measuring the Einstein radius and the lens parallax. The measured masses of the binary components are 0.43 $M_textbackslashodot$ and 0.39 $M_textbackslashodot$ for MOA-2011-BLG-090 and 0.57 $M_textbackslashodot$ and 0.17 $M_textbackslashodot$ for OGLE-2011-BLG-0417 and thus both lens components of MOA-2011-BLG-090 and one component of OGLE-2011-BLG-0417 are M dwarfs, demonstrating the usefulness of microlensing in detecting binaries composed of low-mass components. From modeling of the light curves considering full Keplerian motion of the lens, we also measure the orbital parameters of the binaries. The blended light of OGLE-2011-BLG-0417 comes very likely from the lens itself, making it possible to check the microlensing orbital solution by follow-up radial-velocity observation. For both events, the caustic-crossing parts of the light curves, which are critical for determining the physical lens parameters, were resolved by high-cadence survey observations and thus it is expected that the number of microlensing binaries with measured physical parameters will increase in the future. |
| 6. | Yee, J. C., Shvartzvald, Y., Gal-Yam, A., Bond, I. A., Udalski, A., Kozlowski, S., Han, C., Gould, A., Skowron, J., Suzuki, D., Collaboration, the MOA, Collaboration, the OGLE, Collaboration, the MicroFUN MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections Journal Article The Astrophysical Journal, 755 (2), pp. 102, 2012, ISSN: 0004-637X, 1538-4357, (arXiv: 1201.1002). @article{yee_moa-2011-blg-293lb:_2012, title = {MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections}, author = {Yee, J. C. and Shvartzvald, Y. and Gal-Yam, A. and Bond, I. A. and Udalski, A. and Kozlowski, S. and Han, C. and Gould, A. and Skowron, J. and Suzuki, D. and Collaboration, the MOA and Collaboration, the OGLE and Collaboration, the MicroFUN}, url = {http://arxiv.org/abs/1201.1002}, doi = {10.1088/0004-637X/755/2/102}, issn = {0004-637X, 1538-4357}, year = {2012}, date = {2012-08-01}, urldate = {2016-12-24}, journal = {The Astrophysical Journal}, volume = {755}, number = {2}, pages = {102}, abstract = {Because of the development of large-format, wide-field cameras, microlensing surveys are now able to monitor millions of stars with sufficient cadence to detect planets. These new discoveries will span the full range of significance levels including planetary signals too small to be distinguished from the noise. At present, we do not understand where the threshold is for detecting planets. MOA-2011-BLG-293Lb is the first planet to be published from the new surveys, and it also has substantial followup observations. This planet is robustly detected in survey+followup data (Delta chitextasciicircum2 textasciitilde 5400). The planet/host mass ratio is q=5.3+/- 0.2*10textasciicircum-3. The best fit projected separation is s=0.548+/- 0.005 Einstein radii. However, due to the s--textgreaterstextasciicircum-1 degeneracy, projected separations of stextasciicircum-1 are only marginally disfavored at Delta chitextasciicircum2=3. A Bayesian estimate of the host mass gives M_L = 0.43textasciicircum+0.27_-0.17 M_Sun, with a sharp upper limit of M_L textless 1.2 M_Sun from upper limits on the lens flux. Hence, the planet mass is m_p=2.4textasciicircum+1.5_-0.9 M_Jup, and the physical projected separation is either r_perp = textasciitilde1.0 AU or r_perp = textasciitilde3.4 AU. We show that survey data alone predict this solution and are able to characterize the planet, but the Delta chitextasciicircum2 is much smaller (Delta chitextasciicircum2textasciitilde500) than with the followup data. The Delta chitextasciicircum2 for the survey data alone is smaller than for any other securely detected planet. This event suggests a means to probe the detection threshold, by analyzing a large sample of events like MOA-2011-BLG-293, which have both followup data and high cadence survey data, to provide a guide for the interpretation of pure survey microlensing data.}, note = {arXiv: 1201.1002}, keywords = {}, pubstate = {published}, tppubtype = {article} } Because of the development of large-format, wide-field cameras, microlensing surveys are now able to monitor millions of stars with sufficient cadence to detect planets. These new discoveries will span the full range of significance levels including planetary signals too small to be distinguished from the noise. At present, we do not understand where the threshold is for detecting planets. MOA-2011-BLG-293Lb is the first planet to be published from the new surveys, and it also has substantial followup observations. This planet is robustly detected in survey+followup data (Delta chitextasciicircum2 textasciitilde 5400). The planet/host mass ratio is q=5.3+/- 0.2*10textasciicircum-3. The best fit projected separation is s=0.548+/- 0.005 Einstein radii. However, due to the s--textgreaterstextasciicircum-1 degeneracy, projected separations of stextasciicircum-1 are only marginally disfavored at Delta chitextasciicircum2=3. A Bayesian estimate of the host mass gives M_L = 0.43textasciicircum+0.27_-0.17 M_Sun, with a sharp upper limit of M_L textless 1.2 M_Sun from upper limits on the lens flux. Hence, the planet mass is m_p=2.4textasciicircum+1.5_-0.9 M_Jup, and the physical projected separation is either r_perp = textasciitilde1.0 AU or r_perp = textasciitilde3.4 AU. We show that survey data alone predict this solution and are able to characterize the planet, but the Delta chitextasciicircum2 is much smaller (Delta chitextasciicircum2textasciitilde500) than with the followup data. The Delta chitextasciicircum2 for the survey data alone is smaller than for any other securely detected planet. This event suggests a means to probe the detection threshold, by analyzing a large sample of events like MOA-2011-BLG-293, which have both followup data and high cadence survey data, to provide a guide for the interpretation of pure survey microlensing data. |
| 5. | Choi, J.-Y., Shin, I.-G., Park, S.-Y., Han, C., Gould, A., Sumi, T., Udalski, A., Beaulieu, J.-P., Street, R., Dominik, M., Allen, W., Almeida, L. A., Bos, M., Christie, G. W., Depoy, D. L., Dong, S., Drummond, J., Gal-Yam, A., Gaudi, B. S., Henderson, C. B., Hung, L.-W., Jablonski, F., Janczak, J., Lee, C.-U., Mallia, F., Maury, A., McCormick, J., McGregor, D., Monard, L. A. G., Moorhouse, D., Muñoz, J. A., Natusch, T., Nelson, C., Park, B.-G., Pogge, R. W., Tan, T.-G. "TG", Thornley, G., Yee, J. C., Abe, F., Barnard, E., Baudry, J., Bennett, D. P., Bond, I. A., Botzler, C. S., Freeman, M., Fukui, A., Furusawa, K., Hayashi, F., Hearnshaw, J. B., Hosaka, S., Itow, Y., Kamiya, K., Kilmartin, P. M., Kobara, S., Korpela, A., Lin, W., Ling, C. H., Makita, S., Masuda, K., Matsubara, Y., Miyake, N., Muraki, Y., Nagaya, M., Nishimoto, K., Ohnishi, K., Okumura, T., Omori, K., Perrott, Y. C., Rattenbury, N., Saito, To, Skuljan, L., Sullivan, D. J., Suzuki, D., Suzuki, K., Sweatman, W. L., Takino, S., Tristram, P. J., Wada, K., Yock, P. C. M., Szymański, M. K., Kubiak, M., Pietrzyński, G., Soszyński, I., Poleski, R., Ulaczyk, K., Wyrzykowski, Ł, Kozłowski, S., Pietrukowicz, P., Albrow, M. D., Bachelet, E., Batista, V., Bennett, C. S., Bowens-Rubin, R., Brillant, S., Cassan, A., Cole, A., Corrales, E., Coutures, Ch, Dieters, S., Prester, D. Dominis, Donatowicz, J., Fouqué, P., Greenhill, J., Kane, S. R., Menzies, J., Sahu, K. C., Wambsganss, J., Williams, A., Zub, M., Allan, A., Bramich, D. M., Browne, P., Clay, N., Fraser, S., Horne, K., Kains, N., Mottram, C., Snodgrass, C., Steele, I., Tsapras, Y., Alsubai, K. A., Bozza, V., Burgdorf, M. J., Novati, S. Calchi, Dodds, P., Dreizler, S., Finet, F., Gerner, T., Glitrup, M., Grundahl, F., Hardis, S., Harpsøe, K., Hinse, T. C., Hundertmark, M., Jørgensen, U. G., Kerins, E., Liebig, C., Maier, G., Mancini, L., Mathiasen, M., Penny, M. T., Proft, S., Rahvar, S., Ricci, D., Scarpetta, G., Schäfer, S., Schönebeck, F., Skottfelt, J., Surdej, J., Southworth, J., Zimmer, F. Characterizing Lenses and Lensed Stars of High-Magnification Single-lens Gravitational Microlensing Events With Lenses Passing Over Source Stars Journal Article The Astrophysical Journal, 751 (1), pp. 41, 2012, ISSN: 0004-637X, 1538-4357, (arXiv: 1111.4032). @article{choi_characterizing_2012, title = {Characterizing Lenses and Lensed Stars of High-Magnification Single-lens Gravitational Microlensing Events With Lenses Passing Over Source Stars}, author = {Choi, J.-Y. and Shin, I.-G. and Park, S.-Y. and Han, C. and Gould, A. and Sumi, T. and Udalski, A. and Beaulieu, J.-P. and Street, R. and Dominik, M. and Allen, W. and Almeida, L. A. and Bos, M. and Christie, G. W. and Depoy, D. L. and Dong, S. and Drummond, J. and Gal-Yam, A. and Gaudi, B. S. and Henderson, C. B. and Hung, L.-W. and Jablonski, F. and Janczak, J. and Lee, C.-U. and Mallia, F. and Maury, A. and McCormick, J. and McGregor, D. and Monard, L. A. G. and Moorhouse, D. and Muñoz, J. A. and Natusch, T. and Nelson, C. and Park, B.-G. and Pogge, R. W. and Tan, T.-G. "TG" and Thornley, G. and Yee, J. C. and Abe, F. and Barnard, E. and Baudry, J. and Bennett, D. P. and Bond, I. A. and Botzler, C. S. and Freeman, M. and Fukui, A. and Furusawa, K. and Hayashi, F. and Hearnshaw, J. B. and Hosaka, S. and Itow, Y. and Kamiya, K. and Kilmartin, P. M. and Kobara, S. and Korpela, A. and Lin, W. and Ling, C. H. and Makita, S. and Masuda, K. and Matsubara, Y. and Miyake, N. and Muraki, Y. and Nagaya, M. and Nishimoto, K. and Ohnishi, K. and Okumura, T. and Omori, K. and Perrott, Y. C. and Rattenbury, N. and Saito, To and Skuljan, L. and Sullivan, D. J. and Suzuki, D. and Suzuki, K. and Sweatman, W. L. and Takino, S. and Tristram, P. J. and Wada, K. and Yock, P. C. M. and Szymański, M. K. and Kubiak, M. and Pietrzyński, G. and Soszyński, I. and Poleski, R. and Ulaczyk, K. and Wyrzykowski, Ł and Kozłowski, S. and Pietrukowicz, P. and Albrow, M. D. and Bachelet, E. and Batista, V. and Bennett, C. S. and Bowens-Rubin, R. and Brillant, S. and Cassan, A. and Cole, A. and Corrales, E. and Coutures, Ch and Dieters, S. and Prester, D. Dominis and Donatowicz, J. and Fouqué, P. and Greenhill, J. and Kane, S. R. and Menzies, J. and Sahu, K. C. and Wambsganss, J. and Williams, A. and Zub, M. and Allan, A. and Bramich, D. M. and Browne, P. and Clay, N. and Fraser, S. and Horne, K. and Kains, N. and Mottram, C. and Snodgrass, C. and Steele, I. and Tsapras, Y. and Alsubai, K. A. and Bozza, V. and Burgdorf, M. J. and Novati, S. Calchi and Dodds, P. and Dreizler, S. and Finet, F. and Gerner, T. and Glitrup, M. and Grundahl, F. and Hardis, S. and Harpsøe, K. and Hinse, T. C. and Hundertmark, M. and Jørgensen, U. G. and Kerins, E. and Liebig, C. and Maier, G. and Mancini, L. and Mathiasen, M. and Penny, M. T. and Proft, S. and Rahvar, S. and Ricci, D. and Scarpetta, G. and Schäfer, S. and Schönebeck, F. and Skottfelt, J. and Surdej, J. and Southworth, J. and Zimmer, F.}, url = {http://arxiv.org/abs/1111.4032}, doi = {10.1088/0004-637X/751/1/41}, issn = {0004-637X, 1538-4357}, year = {2012}, date = {2012-05-01}, urldate = {2016-12-24}, journal = {The Astrophysical Journal}, volume = {751}, number = {1}, pages = {41}, abstract = {We present the analysis of the light curves of 9 high-magnification single-lens gravitational microlensing events with lenses passing over source stars, including OGLE-2004-BLG-254, MOA-2007-BLG-176, MOA-2007-BLG-233/OGLE-2007-BLG-302, MOA-2009-BLG-174, MOA-2010-BLG-436, MOA-2011-BLG-093, MOA-2011-BLG-274, OGLE-2011-BLG-0990/MOA-2011-BLG-300, and OGLE-2011-BLG-1101/MOA-2011-BLG-325. For all events, we measure the linear limb-darkening coefficients of the surface brightness profile of source stars by measuring the deviation of the light curves near the peak affected by the finite-source effect. For 7 events, we measure the Einstein radii and the lens-source relative proper motions. Among them, 5 events are found to have Einstein radii less than 0.2 mas, making the lenses candidates of very low-mass stars or brown dwarfs. For MOA-2011-BLG-274, especially, the small Einstein radius of $textbackslashtheta_textbackslashrm Etextbackslashsim 0.08$ mas combined with the short time scale of $t_textbackslashrm Etextbackslashsim 2.7$ days suggests the possibility that the lens is a free-floating planet. For MOA-2009-BLG-174, we measure the lens parallax and thus uniquely determine the physical parameters of the lens. We also find that the measured lens mass of $textbackslashsim 0.84textbackslash M_textbackslashodot$ is consistent with that of a star blended with the source, suggesting that the blend is likely to be the lens. Although we find planetary signals for none of events, we provide exclusion diagrams showing the confidence levels excluding the existence of a planet as a function of the separation and mass ratio.}, note = {arXiv: 1111.4032}, keywords = {}, pubstate = {published}, tppubtype = {article} } We present the analysis of the light curves of 9 high-magnification single-lens gravitational microlensing events with lenses passing over source stars, including OGLE-2004-BLG-254, MOA-2007-BLG-176, MOA-2007-BLG-233/OGLE-2007-BLG-302, MOA-2009-BLG-174, MOA-2010-BLG-436, MOA-2011-BLG-093, MOA-2011-BLG-274, OGLE-2011-BLG-0990/MOA-2011-BLG-300, and OGLE-2011-BLG-1101/MOA-2011-BLG-325. For all events, we measure the linear limb-darkening coefficients of the surface brightness profile of source stars by measuring the deviation of the light curves near the peak affected by the finite-source effect. For 7 events, we measure the Einstein radii and the lens-source relative proper motions. Among them, 5 events are found to have Einstein radii less than 0.2 mas, making the lenses candidates of very low-mass stars or brown dwarfs. For MOA-2011-BLG-274, especially, the small Einstein radius of $textbackslashtheta_textbackslashrm Etextbackslashsim 0.08$ mas combined with the short time scale of $t_textbackslashrm Etextbackslashsim 2.7$ days suggests the possibility that the lens is a free-floating planet. For MOA-2009-BLG-174, we measure the lens parallax and thus uniquely determine the physical parameters of the lens. We also find that the measured lens mass of $textbackslashsim 0.84textbackslash M_textbackslashodot$ is consistent with that of a star blended with the source, suggesting that the blend is likely to be the lens. Although we find planetary signals for none of events, we provide exclusion diagrams showing the confidence levels excluding the existence of a planet as a function of the separation and mass ratio. |
2011 |
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| 4. | Schaefer, Bradley E., Pagnotta, Ashley, LaCluyze, Aaron, Reichart, Daniel E., Ivarsen, Kevin M., Haislip, Joshua B., Nysewander, Melissa C., Moore, Justin P., Oksanen, Arto, Worters, Hannah L., Sefako, Ramotholo R., Mentz, Jaco, Dvorak, Shawn, Gomez, Tomas, Harris, Barbara G., Henden, Arne, Tan, Thiam Guan, Templeton, Matthew, Allen, W. H., Monard, Berto, Rea, Robert D., Roberts, George, Stein, William, Maehara, Hiroyuki, Richards, Thomas, Stockdale, Chris, Krajci, Tom, Sjoberg, George, McCormick, Jennie, Revnivtsev, Mikhail, Molkov, Sergei, Suleimanov, Valery, Darnley, Matthew J., Bode, Michael F., Handler, Gerald, Lepine, Sebastien, Shara, Michael Eclipses During the 2010 Eruption of the Recurrent Nova U Scorpii Journal Article The Astrophysical Journal, 742 (2), pp. 113, 2011, ISSN: 0004-637X, 1538-4357, (arXiv: 1108.1214). @article{schaefer_eclipses_2011, title = {Eclipses During the 2010 Eruption of the Recurrent Nova U Scorpii}, author = {Schaefer, Bradley E. and Pagnotta, Ashley and LaCluyze, Aaron and Reichart, Daniel E. and Ivarsen, Kevin M. and Haislip, Joshua B. and Nysewander, Melissa C. and Moore, Justin P. and Oksanen, Arto and Worters, Hannah L. and Sefako, Ramotholo R. and Mentz, Jaco and Dvorak, Shawn and Gomez, Tomas and Harris, Barbara G. and Henden, Arne and Tan, Thiam Guan and Templeton, Matthew and Allen, W. H. and Monard, Berto and Rea, Robert D. and Roberts, George and Stein, William and Maehara, Hiroyuki and Richards, Thomas and Stockdale, Chris and Krajci, Tom and Sjoberg, George and McCormick, Jennie and Revnivtsev, Mikhail and Molkov, Sergei and Suleimanov, Valery and Darnley, Matthew J. and Bode, Michael F. and Handler, Gerald and Lepine, Sebastien and Shara, Michael}, url = {http://arxiv.org/abs/1108.1214}, doi = {10.1088/0004-637X/742/2/113}, issn = {0004-637X, 1538-4357}, year = {2011}, date = {2011-12-01}, urldate = {2016-12-24}, journal = {The Astrophysical Journal}, volume = {742}, number = {2}, pages = {113}, abstract = {The eruption of the recurrent nova U Scorpii on 28 January 2010 is now the all-time best observed nova event. We report 36,776 magnitudes throughout its 67 day eruption, for an average of one measure every 2.6 minutes. This unique and unprecedented coverage is the first time that a nova has any substantial amount of fast photometry. With this, two new phenomena have been discovered: the fast flares in the early light curve seen from days 9-15 (which have no proposed explanation) and the optical dips seen out of eclipse from days 41-61 (likely caused by raised rims of the accretion disk occulting the bright inner regions of the disk as seen over specific orbital phases). The expanding shell and wind cleared enough from days 12-15 so that the inner binary system became visible, resulting in the sudden onset of eclipses and the turn-on of the supersoft X-ray source. On day 15, a strong asymmetry in the out-of-eclipse light points to the existence of the accretion stream. The normal optical flickering restarts on day 24.5. For days 15-26, eclipse mapping shows that the optical source is spherically symmetric with a radius of 4.1 R_sun. For days 26-41, the optical light is coming from a rim-bright disk of radius 3.4 R_sun. For days 41-67, the optical source is a center-bright disk of radius 2.2 R_sun. Throughout the eruption, the colors remain essentially constant. We present 12 eclipse times during eruption plus five just after the eruption.}, note = {arXiv: 1108.1214}, keywords = {}, pubstate = {published}, tppubtype = {article} } The eruption of the recurrent nova U Scorpii on 28 January 2010 is now the all-time best observed nova event. We report 36,776 magnitudes throughout its 67 day eruption, for an average of one measure every 2.6 minutes. This unique and unprecedented coverage is the first time that a nova has any substantial amount of fast photometry. With this, two new phenomena have been discovered: the fast flares in the early light curve seen from days 9-15 (which have no proposed explanation) and the optical dips seen out of eclipse from days 41-61 (likely caused by raised rims of the accretion disk occulting the bright inner regions of the disk as seen over specific orbital phases). The expanding shell and wind cleared enough from days 12-15 so that the inner binary system became visible, resulting in the sudden onset of eclipses and the turn-on of the supersoft X-ray source. On day 15, a strong asymmetry in the out-of-eclipse light points to the existence of the accretion stream. The normal optical flickering restarts on day 24.5. For days 15-26, eclipse mapping shows that the optical source is spherically symmetric with a radius of 4.1 R_sun. For days 26-41, the optical light is coming from a rim-bright disk of radius 3.4 R_sun. For days 41-67, the optical source is a center-bright disk of radius 2.2 R_sun. Throughout the eruption, the colors remain essentially constant. We present 12 eclipse times during eruption plus five just after the eruption. |
2009 |
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| 3. | Tan, T. G., Jacques, C., Pimentel, E. Supernova 2009gg in Pgc 65919 Journal Article Central Bureau Electronic Telegrams, 1848 , pp. 1, 2009. @article{tan_supernova_2009, title = {Supernova 2009gg in Pgc 65919}, author = {Tan, T. G. and Jacques, C. and Pimentel, E.}, url = {http://adsabs.harvard.edu/abs/2009CBET.1848....1T}, year = {2009}, date = {2009-01-01}, urldate = {2016-12-24}, journal = {Central Bureau Electronic Telegrams}, volume = {1848}, pages = {1}, abstract = {CBET 1848 available at Central Bureau for Astronomical Telegrams.}, keywords = {}, pubstate = {published}, tppubtype = {article} } CBET 1848 available at Central Bureau for Astronomical Telegrams. |
2008 |
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| 2. | Tan, T. G. Supernova 2008ff in Pgc 64319 Journal Article Central Bureau Electronic Telegrams, 1488 , pp. 1, 2008. @article{tan_supernova_2008, title = {Supernova 2008ff in Pgc 64319}, author = {Tan, T. G.}, url = {http://adsabs.harvard.edu/abs/2008CBET.1488....1T}, year = {2008}, date = {2008-09-01}, urldate = {2016-12-24}, journal = {Central Bureau Electronic Telegrams}, volume = {1488}, pages = {1}, abstract = {CBET 1488 available at Central Bureau for Astronomical Telegrams.}, keywords = {}, pubstate = {published}, tppubtype = {article} } CBET 1488 available at Central Bureau for Astronomical Telegrams. |
2007 |
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| 1. | Tan, T. G., Suzuki, M., Nakano, S., Nishiyama, K., Kabashima, F. Supernova 2007rv in NGC 689 Journal Article Central Bureau Electronic Telegrams, 1152 , pp. 1, 2007. @article{tan_supernova_2007, title = {Supernova 2007rv in NGC 689}, author = {Tan, T. G. and Suzuki, M. and Nakano, S. and Nishiyama, K. and Kabashima, F.}, url = {http://adsabs.harvard.edu/abs/2007CBET.1152....1T}, year = {2007}, date = {2007-12-01}, urldate = {2016-12-24}, journal = {Central Bureau Electronic Telegrams}, volume = {1152}, pages = {1}, abstract = {CBET 1152 available at Central Bureau for Astronomical Telegrams.}, keywords = {}, pubstate = {published}, tppubtype = {article} } CBET 1152 available at Central Bureau for Astronomical Telegrams. |