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Published August 20, 2006 | Published
Journal Article Open

A Measurement of the Polarization-Temperature Angular Cross-Power Spectrum of the Cosmic Microwave Background from the 2003 Flight of BOOMERANG


We present a measurement of the polarization-temperature angular cross power spectra, and , of the cosmic microwave background. The result is based on ~200 hr of data from eight polarization-sensitive bolometers operating at 145 GHz during the 2003 flight of BOOMERANG. We detect a significant TE correlation in the l-range between 50 and 950 with a statistical significance of >3.5 σ. Contamination by polarized foreground emission and systematic effects are negligible in comparison with statistical uncertainties. The spectrum is consistent with previous detections and with the "concordance model" that assumes adiabatic initial conditions. This is the first measurement of polarization-temperature angular cross-power spectra using bolometric detectors.

Additional Information

© 2006 American Astronomical Society. Received 2005 July 21; accepted 2006 February 10. We gratefully acknowledge support from CIAR, CSA, and NSERC in Canada, ASI, University La Sapienza and PNRA in Italy, PPARC and the Leverhulme Trust in the UK, and NASA (awards NAG5-9251 and NAG5-12723) and NSF (awards OPP 99-80654 and OPP 04-07592) in the US. Additional support for detector development was provided by CITand the Jet Propulsion Laboratory (JPL). C. B. N. acknowledges support from a Sloan Foundation Fellowship; W. C. J. and T. E. M. were partially supported by NASA GSRP Fellowships. Field, logistical, and flight support was outstandingly supplied by USAP and NSBF; data recovery was especially appreciated. This research used resources at NERSC, supported by the DOE under contract DEAC03- 76SF00098, and the MacKenzie cluster at CITA, funded by the Canada Foundation for Innovation. We also thank the CASPUR (Rome, Italy) computational facilities and the Applied Cluster Computing Technologies Group at the JPL for computing time and technical support. Some of the results in this paper have been derived using the HEALPix (Go´rski et al. 2005) package, and nearly all have benefited from the FFTW3 implementation of fast Fourier transform (Frigo & Johnson 2005). We acknowledge the referee for useful comments. The BOOMERANG field team is also grateful to the Coffee House at McMurdo Station, Antarctica, for existing.

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