%0 Generic %1 collaboration2021bicep %A Collaboration, BICEP/Keck %A :, %A Ade, P. A. R. %A Ahmed, Z. %A Amiri, M. %A Barkats, D. %A Thakur, R. Basu %A Beck, D. %A Bischoff, C. %A Bock, J. J. %A Boenish, H. %A Bullock, E. %A Buza, V. %A Cheshire IV, J. R. %A Connors, J. %A Cornelison, J. %A Crumrine, M. %A Cukierman, A. %A Denison, E. V. %A Dierickx, M. %A Duband, L. %A Eiben, M. %A Fatigoni, S. %A Filippini, J. P. %A Fliescher, S. %A Goeckner-Wald, N. %A Goldfinger, D. C. %A Grayson, J. %A Grimes, P. %A Halal, G. %A Hall, G. %A Halpern, M. %A Hand, E. %A Harrison, S. %A Henderson, S. %A Hildebrandt, S. R. %A Hilton, G. C. %A Hubmayr, J. %A Hui, H. %A Irwin, K. D. %A Kang, J. %A Karkare, K. S. %A Karpel, E. %A Kefeli, S. %A Kernasovskiy, S. A. %A Kovac, J. M. %A Kuo, C. L. %A Lau, K. %A Leitch, E. M. %A Lennox, A. %A Megerian, K. G. %A Minutolo, L. %A Moncelsi, L. %A Nakato, Y. %A Namikawa, T. %A Nguyen, H. T. %A O'Brient, R. %A Ogburn IV, R. W. %A Palladino, S. %A Prouve, T. %A Pryke, C. %A Racine, B. %A Reintsema, C. D. %A Richter, S. %A Schillaci, A. %A Schmitt, B. L. %A Schwarz, R. %A Sheehy, C. D. %A Soliman, A. %A Germaine, T. St %A Steinbach, B. %A Sudiwala, R. V. %A Teply, G. P. %A Thompson, K. L. %A Tolan, J. E. %A Tucker, C. %A Turner, A. %A Umilta, C. %A Verges, C. %A Vieregg, A. G. %A Wandui, A. %A Weber, A. C. %A Wiebe, D. V. %A Willmert, J. %A Wong, C. L. %A Wu, W. L. K. %A Yang, H. %A Yoon, K. W. %A Young, E. %A Yu, C. %A Zeng, L. %A Zhang, C. %A Zhang, S. %D 2021 %K tifr %T BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season %U http://arxiv.org/abs/2110.00483 %X We present results from an analysis of all data taken by the BICEP2, Keck Array and BICEP3 CMB polarization experiments up to and including the 2018 observing season. We add additional Keck Array observations at 220 GHz and BICEP3 observations at 95 GHz to the previous 95/150/220 GHz data set. The $Q/U$ maps now reach depths of 2.8, 2.8 and 8.8 $K_cmb$ arcmin at 95, 150 and 220 GHz respectively over an effective area of $600$ square degrees at 95 GHz and $400$ square degrees at 150 & 220 GHz. The 220 GHz maps now achieve a signal-to-noise on polarized dust emission exceeding that of Planck at 353 GHz. We take auto- and cross-spectra between these maps and publicly available WMAP and Planck maps at frequencies from 23 to 353 GHz and evaluate the joint likelihood of the spectra versus a multicomponent model of lensed-$Łambda$CDM+$r$+dust+synchrotron+noise. The foreground model has seven parameters, and no longer requires a prior on the frequency spectral index of the dust emission taken from measurements on other regions of the sky. This model is an adequate description of the data at the current noise levels. The likelihood analysis yields the constraint $r_0.05<0.036$ at 95% confidence. Running maximum likelihood search on simulations we obtain unbiased results and find that $\sigma(r)=0.009$. These are the strongest constraints to date on primordial gravitational waves.

@misc{collaboration2021bicep, abstract = {We present results from an analysis of all data taken by the BICEP2, Keck Array and BICEP3 CMB polarization experiments up to and including the 2018 observing season. We add additional Keck Array observations at 220 GHz and BICEP3 observations at 95 GHz to the previous 95/150/220 GHz data set. The $Q/U$ maps now reach depths of 2.8, 2.8 and 8.8 $\mu{\mathrm K}_{cmb}$ arcmin at 95, 150 and 220 GHz respectively over an effective area of $\approx 600$ square degrees at 95 GHz and $\approx 400$ square degrees at 150 & 220 GHz. The 220 GHz maps now achieve a signal-to-noise on polarized dust emission exceeding that of Planck at 353 GHz. We take auto- and cross-spectra between these maps and publicly available WMAP and Planck maps at frequencies from 23 to 353 GHz and evaluate the joint likelihood of the spectra versus a multicomponent model of lensed-$\Lambda$CDM+$r$+dust+synchrotron+noise. The foreground model has seven parameters, and no longer requires a prior on the frequency spectral index of the dust emission taken from measurements on other regions of the sky. This model is an adequate description of the data at the current noise levels. The likelihood analysis yields the constraint $r_{0.05}<0.036$ at 95% confidence. Running maximum likelihood search on simulations we obtain unbiased results and find that $\sigma(r)=0.009$. These are the strongest constraints to date on primordial gravitational waves.}, added-at = {2021-10-04T07:50:09.000+0200}, author = {Collaboration, BICEP/Keck and : and Ade, P. A. R. and Ahmed, Z. and Amiri, M. and Barkats, D. and Thakur, R. Basu and Beck, D. and Bischoff, C. and Bock, J. J. and Boenish, H. and Bullock, E. and Buza, V. and Cheshire IV, J. R. and Connors, J. and Cornelison, J. and Crumrine, M. and Cukierman, A. and Denison, E. V. and Dierickx, M. and Duband, L. and Eiben, M. and Fatigoni, S. and Filippini, J. P. and Fliescher, S. and Goeckner-Wald, N. and Goldfinger, D. C. and Grayson, J. and Grimes, P. and Halal, G. and Hall, G. and Halpern, M. and Hand, E. and Harrison, S. and Henderson, S. and Hildebrandt, S. R. and Hilton, G. C. and Hubmayr, J. and Hui, H. and Irwin, K. D. and Kang, J. and Karkare, K. S. and Karpel, E. and Kefeli, S. and Kernasovskiy, S. A. and Kovac, J. M. and Kuo, C. L. and Lau, K. and Leitch, E. M. and Lennox, A. and Megerian, K. G. and Minutolo, L. and Moncelsi, L. and Nakato, Y. and Namikawa, T. and Nguyen, H. T. and O'Brient, R. and Ogburn IV, R. W. and Palladino, S. and Prouve, T. and Pryke, C. and Racine, B. and Reintsema, C. D. and Richter, S. and Schillaci, A. and Schmitt, B. L. and Schwarz, R. and Sheehy, C. D. and Soliman, A. and Germaine, T. St and Steinbach, B. and Sudiwala, R. V. and Teply, G. P. and Thompson, K. L. and Tolan, J. E. and Tucker, C. and Turner, A. and Umilta, C. and Verges, C. and Vieregg, A. G. and Wandui, A. and Weber, A. C. and Wiebe, D. V. and Willmert, J. and Wong, C. L. and Wu, W. L. K. and Yang, H. and Yoon, K. W. and Young, E. and Yu, C. and Zeng, L. and Zhang, C. and Zhang, S.}, biburl = {https://www.bibsonomy.org/bibtex/2301d7ee7907cbcc8d823b21fadf21511/citekhatri}, description = {BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season}, interhash = {934eda3505805f8ea89a18e620da7c84}, intrahash = {301d7ee7907cbcc8d823b21fadf21511}, keywords = {tifr}, note = {cite arxiv:2110.00483Comment: 22 pages, 24 figures, as published in PRL, data and figures available for download at http://bicepkeck.org}, timestamp = {2021-10-04T07:50:09.000+0200}, title = {BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season}, url = {http://arxiv.org/abs/2110.00483}, year = 2021 }