Bradford A. Benson

Learn More
Gravitational lensing of the cosmic microwave background generates a curl pattern in the observed polarization. This "B-mode" signal provides a measure of the projected mass distribution over the entire observable Universe and also acts as a contaminant for the measurement of primordial gravity-wave signals. In this Letter we present the first detection of(More)
SPTpol is a dual-frequency polarization-sensitive camera that was deployed on the 10-meter South Pole Telescope in January 2012. SPTpol will measure the polarization anisotropy of the cosmic microwave background (CMB) on angular scales spanning an arcminute to several degrees. The polarization sensitivity of SPTpol will enable a detection of the CMB(More)
We explore extensions to the ΛCDM cosmology using measurements of the cosmic microwave background (CMB) from the recent SPT-SZ survey, along with data from WMAP7 and measurements of H0 and BAO. We check for consistency within ΛCDM between these datasets, and find some tension. The CMB alone gives weak support to physics beyond ΛCDM, due to a slight trend(More)
We present a catalog of galaxy clusters selected via their Sunyaev–Zel’dovich (SZ) effect signature from 2500 deg2 of South Pole Telescope (SPT) data. This work represents the complete sample of clusters detected at high significance in the 2500 deg2 SPT-SZ survey, which was completed in 2011. A total of 677 (409) cluster candidates are identified above a(More)
We have made measurements of the Sunyaev-Zel’dovich (SZ) effect in six galaxy clusters at z > 0.2 using the Sunyaev-Zel’dovich Infrared Experiment (SuZIE II) in three frequency bands between 150 and 350GHz. Simultaneous multi-frequency measurements have been used to distinguish between thermal and kinematic components of the SZ effect, and to significantly(More)
We present a point source catalog from 771 deg of the South Pole Telescope Sunyaev Zel’dovich (SPT-SZ) survey at 95, 150, and 220 GHz. We detect 1545 sources above 4.5σ significance in at least one band. Based on their relative brightness between survey bands, we classify the sources into two populations, one dominated by synchrotron emission from active(More)
We present measurements of secondary cosmic microwave background (CMB) anisotropies and cosmic infrared background (CIB) fluctuations using data from the South Pole Telescope (SPT) covering the complete 2540 deg SPT-SZ survey area. Data in the three SPT-SZ frequency bands centered at 95, 150, and 220 GHz, are used to produce six angular power spectra (three(More)
We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 deg2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 and 150 GHz. We report(More)
A large number of iron-chelating compounds (siderophores) were isolated from supernatants of iron-deficient cultures of a mold isolate, subsequently identified as Aspergillus ochraceous . Siderophores in their iron chelate form were purified to homogeneity by using Bio-Gel P2, silica gel, and C-18 bonded silica gel (reverse-phase) columns. Most of these(More)
We previously described a 110-kDa tyrosine phosphoprotein, Sob 1, that regulates formation of the DNA binding complex Band A at the c-fos serum response element (SRE) during T cell activation. Using competition and mutant oligonucleotide analysis, we have determined that both the core CArG box of the c-fos SRE and the 3' sequences flanking the CArG box are(More)