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| An Intensive Hubble Space Telescope Survey for z>1 Type Ia Supernovae by Targeting Galaxy Clusters |
Dawson et al. (The Supernova Cosmology Project) 2009, AJ, 138, 1271 (arXiv:0908.3928)
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 < z < 1.5, we obtain a twofold improvement in the efficiency of finding SNe compared to an HST field survey and a factor of three improvement in the total yield of SN detections in relatively dust-free red-sequence galaxies. In total, sixteen SNe were discovered at z > 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. |
| SN Light Curves | Survey Statistics |
SN lightcurves and z850 AB magnitudes of the high redshift SNe discovered in the survey. Each lightcurve is labeled with the SN redshift in the same color. NICMOS and i775 observations are not shown, nor are additional SNe at z<0.8. |
The redshift distribution of the SNe discovered in our ACS program. The upper panel shows the distribution of red-sequence galaxies that had SNe Ia, with the cluster members indicated by ``C''. The asterisk indicates [OII] emission in the spectrum of a galaxy with red-sequence color and spectral features as explained in the text. The lower panel shows the distribution for the other SN hosts. For z > 0.95, the number of SNe in cluster galaxies (9) is comparable to the number of SNe in field galaxies (7). |
| Publications from this HST Cluster Survey | |||||||
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An Intensive HST Survey for z > 1 Supernovae by Targeting Galaxy Clusters : This Paper
Dawson et al. 2009 AJ, 138, 1271 (arXiv:0908.3928) HST Discovery of a z=3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens WARPS J1415+36 at z=1.026 Huang et al. 2009 ApJ accepted, arXiv:0911.0138 Subaru FOCAS Spectroscopic Observations for High-Redshift Supernovae Morokuma et al. 2009 PASJ submitted Hubble Space Telescope Weak-Lensing Study of the Galaxy Cluster XMMU J2235.3-2557 at z = 1.4: A Surprisingly Massive Galaxy Cluster when the Universe is One-Third of its Current Age Jee et al. 2009 ApJ accepted, arXiv:0908.3897 Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1 Rosati et al. 2009 A&A submitted Multiwavelength observations of a rich galaxy cluster at z = 1. The HST/ACS colour-magnitude diagram Santos et al. 2009 A&A, 501, 49 The XMM Cluster Survey: Galaxy Morphologies and the Color-Magnitude Relation in XMMXCS J2215.9-2013 1738 at z = 1.46 Hilton et al. 2009 ApJ, 697, 436 Discovery of an Unusual Optical Transient with the Hubble Space Telescope Barbary et al. 2009, ApJ, 690, 1358 Clusters of Galaxies in the First Half of the Universe from the IRAC Shallow Survey Eisenhardt et al. 2008 ApJ, 684, 905 The XMM Cluster Survey: The Dynamical State of XMMXCS J2215.9-1738 at z = 1.457 Hilton et al. 2007, ApJ, 670, 1000 Rest-Frame R-band Light Curve of a z ~ 1.3 Supernova Obtained with Keck Laser Adaptive Optics Melbourne et al. 20007, AJ, 133, 2709 |
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