Twenty‐Three High‐Redshift Supernovae from the Institute for Astronomy Deep Survey: Doubling the Supernova Sample at<i>z</i>&gt; 0.7

Barris, B.; Tonry, J.; Blondin, S.; Challis, P.; Chornock, R.; Clocchiatti, A.; Filippenko, A. V.; Garnavich, P.; Holland, S. T.; Jha, Saurabh W.; Kirshner, R.; Krisciunas, K.; Leibundgut, B.; Li, Weidong; Matheson, T.; Miknaitis, G.; Riess, Adam G.; Schmidt, B. P.; Smith, R. C.; Sollerman, J.; Spyromilio, J.; Stubbs, C. W.; Suntzeff, Nicholas B.; Aussel, H.; Chambers, K.; Connelley, Michael S.; Donovan, David; Henry, J. P.; Kaiser, Nick; Liu, Mengmeng; Martín, E. L.; Wainscoat, R. J.

doi:10.1086/381122

Cited by 400 publications

(260 citation statements)

References 73 publications

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“…1. Complementary data include Giant Metrewave Radio Telescope 610 MHz data, providing spectral indices (or limits) for all sources; deep Spitzer/SWIRE data (Lonsdale et al 2003); deep XMM-Newton data (Brunner et al 2008); and optical coverage with the Large Binocular Telescope and the Subaru telescope (Barris et al 2004;Rovilos et al 2009;Fotopoulou et al 2012). Furthermore, very deep 3.6 µm and 4.5 µm data from the Spitzer/SERVS mission (Mauduit et al 2012), and very deep 250-500 µm data from the HERMES project will be available soon.…”

Section: Field Selectionmentioning

confidence: 99%

“…In this catalogue the Large Binocular Telescope (LBT) images presented in Rovilos et al (2009) were combined to create a new catalogue of optically and near-infrared detected sources in the field. In addition to the U BV bands this multi-wavelength photometry catalogue includes the PSFhomogenised fixed-aperture photometry from LBT Y and z-band observations, the Subaru R, I c , z bands from Barris et al (2004), the UKIDSS J and K bands, the 3.6 µm to 8.0 µm photometry from the Spitzer Wide-area Infrared Extragalactic survey (SWIRE, Lonsdale et al 2003) and GALEX photometry. Except for the near-infrared data, all the other bands provide very sensitive data (see Table 2 of Fotopoulou et al 2012 for the depth of the optical bands).…”

Section: Multi-wavelength Properties Of the Detected Sourcesmentioning

confidence: 99%

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Mosaiced wide-field VLBI observations of the Lockman Hole/XMM

Middelberg¹,

Deller²,

Norris³

et al. 2013

A&A

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Active galactic nuclei (AGN) play a decisive role in galaxy evolution, particularly so when they launch powerful jets, which reshape their surroundings. However, identifying them is difficult, since radio observations typically have a resolution between 1 arcsec and 10 arcsec, which is equally sensitive to radio emission from star-forming activity and from AGN. Very Long Baseline Interferometry (VLBI) observations allow only the most compact non-thermal emission to be filtered from radio survey data. The observational and computational demands to do this in large surveys have, until recently, been too high to make this practical. Only the recent advent of wide-field observing techniques have enabled such observations, and we here present the results of a survey of 217 radio sources in the Lockman Hole/XMM field. We describe in detail some new aspects of the calibration, including primary beam correction, multisource self-calibration, and mosaicing. We detected 65 out of the 217 radio sources and were able to construct, for the first time, the source counts of VLBI-detected AGN. The source counts indicate that at least 15-25% of the sub-mJy radio sources are AGN-driven, consistent with recent findings using other AGN selection techniques. We have used optical, infrared and X-ray data to enhance our data set and to investigate the AGN hosts. We find that among the sources nearby enough to be resolved in the optical images, 88% (23/26) could be classified as early-type or bulge-dominated galaxies. While 50% of these sources are correctly represented by the SED of an early-type galaxy, the best fit for the remainder was obtained with a heavily extinct starburst template. However, this is due to a degeneracy in the fit, as such extinction in the templates is mimicking early-type objects. Our data suggest that the hosts of VLBI-detected sources are typically early-type or bulge-dominated galaxies.

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Section: Field Selectionmentioning

confidence: 99%

Section: Multi-wavelength Properties Of the Detected Sourcesmentioning

confidence: 99%

Mosaiced wide-field VLBI observations of the Lockman Hole/XMM

Middelberg¹,

Deller²,

Norris³

et al. 2013

A&A

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show abstract

“…The SNIa data have been corrected for mixing, and indeed cluster around the nonaccelerating Einstein-de Sitter (EdS) model ( M ; Ã ) ¼ (1; 0). We used the combined data sets of Tonry et al (2003) and Barris et al (2004), to which we added the new supernovae from Knop et al (2003). However, the radio If mixing were the origin of supernovae dimming, we should expect the radio galaxy data to coincide with the best-fit y(z) curve of this corrected SNIa data, near Áy(z) ¼ 0; however, the radio galaxy data lies systematically above this curve, favoring an accelerating universe.…”

Section: Constraints From Current Datamentioning

confidence: 99%

“…The accumulating evidence for recent cosmic acceleration (Barris et al 2004;Knop et al 2003) leaves us with the familiar coincidence problem: why do we live at such a special time? An attractive alternative is that the acceleration is a mirage and not a real feature of the dynamics of our universe.…”

Section: Introductionmentioning

confidence: 99%

Cosmic Acceleration versus Axion‐Photon Mixing

Bassett

Kunz

2004

ApJ

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Axion-photon mixing has been proposed as an alternative to acceleration as the explanation for supernovae dimming. We point out that the loss of photons due to this mixing will induce a strong asymmetry between the luminosity, d L (z), and angular diameter distance, d A (z), since the latter is unaffected by mixing. In a first search for such an asymmetry, we introduce a dimensionless mixing amplitude k such that k ¼ 0 if no photons are lost and k % 1 if axion-photon mixing occurs. The best fit to Type Ia supernovae and radio galaxy data is k ¼ À0:3 þ0:6 À0:4 (95% confidence level), corresponding to an unphysical, negative mixing length. This same argument limits the attenuation of light from supernovae due to dust. We show that future d L and d A data from the Supernova/Acceleration Probe and galaxy surveys such as DEEP2 and KAOS will detect or rule out mixing at more than 5 almost independently of the dark energy dynamics. Finally, we discuss the constraints from the near-maximal polarization of the gamma-ray burst (GRB) GRB 021206. Since mixing reduces the polarization of distant sources, future observations of high-redshift GRBs will provide orthogonal constraints on axion-photon mixing and related scenarios.

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“…The astrophysical observations of recent years, including Type Ia supernovae (SNe Ia; [1,2,3,4,5,6,7]), the large scale structure [8], and the cosmic microwave background radiation (CMB; [9,10,11,12,13,14]) et al, show that the present expansion of our universe is accelerating. In order to explain this observed accelerating expansion, a large number of cosmological models have been proposed by cosmologists.…”

Section: Introductionmentioning

confidence: 99%