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Showing papers by "M. Kowalski published in 2009"

Journal Article•DOI•
An Intensive HST Survey for z>1 Supernovae by Targeting Galaxy Clusters

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Kyle Dawson, Greg Aldering, Rahman Amanullah, Kyle Barbary, L. F. Barrientos, M. Brodwin, Natalia Connolly, Arjun Dey, Mamoru Doi, Megan Donahue, Peter Eisenhardt, Erica Ellingson, L. Faccioli, Vitaliy Fadeyev, H. K. Fakhouri, A. S. Fruchter, David G. Gilbank, Michael D. Gladders, G. Goldhaber, Anthony H. Gonzalez, A. Goobar, Alexander Gude, Takashi Hattori, Henk Hoekstra, Xiaosheng Huang, Yutaka Ihara, Buell T. Jannuzi, David Johnston, K. Kashikawa, Benjamin P. Koester, Kohki Konishi, M. Kowalski, C. Lidman, Eric V. Linder, Lori M. Lubin, J. Meyers, Tomoki Morokuma, F. Munshi, C. R. Mullis, Takeshi Oda, Nino Panagia, Saul Perlmutter, Marc Postman, T. A. Pritchard, Jason Rhodes, Piero Rosati, David Rubin, David J. Schlegel, A. L. Spadafora, S. A. Stanford, Vallery Stanishev, D. Stern, M. Strovink, Nao Suzuki, Naohiro Takanashi, Kouichi Tokita, M. Wagner, Lifan Wang, Naoki Yasuda, H. K. C. Yee 
27 Aug 2009-arXiv: Cosmology and Nongalactic Astrophysics
TL;DR: In this paper, the authors presented a new survey strategy to discover and study high redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST).
Abstract: We present a new survey strategy to discover and study high redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST). By targeting massive galaxy clusters at 0.9 0.95, nine of which were in galaxy clusters. This strategy provides a SN sample that can be used to decouple the effects of host galaxy extinction and intrinsic color in high redshift SNe, thereby reducing one of the largest systematic uncertainties in SN cosmology.

67 citations

Journal Article•DOI•
Hubble space telescope discovery of A Z = 3.9 multiply imaged galaxy behind the complex cluster lens warps J1415.1+36 at z = 1.026

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Xiaosheng Huang1, Tomoki Morokuma2, H. K. Fakhouri1, H. K. Fakhouri3, Greg Aldering3, Rahman Amanullah4, Kyle Barbary3, Kyle Barbary1, Mark Brodwin5, Natalia Connolly6, Kyle S. Dawson7, Masao Doi8, L. Faccioli3, Vitaliy Fadeyev9, A. S. Fruchter10, Gerson Goldhaber3, Gerson Goldhaber1, Michael D. Gladders11, Joseph F. Hennawi1, Yutaka Ihara8, Yutaka Ihara2, Myungkook J. Jee12, M. Kowalski13, Kohki Konishi8, C. Lidman, J. Meyers3, J. Meyers1, Leonidas A. Moustakas14, Saul Perlmutter3, Saul Perlmutter1, David Rubin3, David Rubin1, David J. Schlegel3, A. L. Spadafora3, Nao Suzuki3, Naohiro Takanashi, Naoki Yasuda8 •
University of California, Berkeley1, Japan Society for the Promotion of Science2, Lawrence Berkeley National Laboratory3, Stockholm University4, Harvard University5, Hamilton College6, University of Utah7, University of Tokyo8, University of California, Santa Cruz9, Space Telescope Science Institute10, University of Chicago11, University of California, Davis12, Humboldt State University13, California Institute of Technology14
10 Dec 2009-The Astrophysical Journal
TL;DR: In this article, the discovery of a multiply lensed Ly alpha emitter at z = 3.90 behind the massive cluster WARPS J1415.1+3612 was reported.
Abstract: We report the discovery of a multiply lensed Ly alpha emitter at z = 3.90 behind the massive cluster WARPS J1415.1+3612 at z = 1.026. Images taken by the Hubble Space Telescope using the Advanced C ...

21 citations

Discovery of an Unusual Optical Transient with the Hubble Space Telescope

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Kyle Barbary, Kyle S. Dawson, Kouichi Tokita, Greg Aldering, Rahman Amanullah, Natalia Connolly, Mamoru Doi, L. Faccioli, Vitaliy Fadeyev, A. S. Fruchter, G. Goldhaber, A. Goobar, Alexander Gude, X. Huang, Yutaka Ihara, Kohki Konishi, M. Kowalski, C. Lidman, J. Meyers, Tomoki Morokuma, Peter Nugent, Saul Perlmutter, David Rubin, David J. Schlegel, A. L. Spadafora, N. Suzuki, H. Swift, Naohiro Takanashi, R. C. Thomas, Naoki Yasuda, Supernova Cosmology 
01 Jan 2009
TL;DR: In this article, the authors present observations of SCP 06F6, an unusual optical transient discovered during the Hubble Space Telescope Cluster Supernova Survey, which brightened over a period of ~100 days, reached a peak magnitude of ~21.0 in both i_775 and z_850, and then declined over a similar timescale.
Abstract: We present observations of SCP 06F6, an unusual optical transient discovered during the Hubble Space Telescope Cluster Supernova Survey. The transient brightened over a period of ~;;100 days, reached a peak magnitude of ~;;21.0 in both i_775 and z_850, and then declined over a similar timescale. There is no host galaxy or progenitor star detected at the location of the transient to a 3 sigma upper limit of i_775 = 26.4 and z_850 = 26.1, giving a corresponding lower limit on the flux increase of a factor of ~;;120. Multiple spectra show five broad absorption bands between 4100 AA and 6500 AA and a mostly featureless continuum longward of 6500 AA. The shape of the lightcurve is inconsistent with microlensing. The transient's spectrum, in addition to being inconsistent with all known supernova types, is not matched to any spectrum in the Sloan Digital Sky Survey (SDSS) database. We suggest that the transient may be one of a new class.

2 citations