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    I am an astronomer, cosmologist, and data scientist. I am currently a NSF funded Research Associate in the MIT Program in Science, Technology and Society (STS) and a Visiting Research Scientist at the MIT Center for Theoretical Physics. I work on several theoretical and observational cosmology projects, including devising fun experiments that leverage cosmology to help test fundamental physics and observing exploding stars with ground and space based telescopes. Before MIT, I completed a PhD in Astronomy & Astrophysics from the Harvard University Department of Astronomy and I received my BA in Physics & Astrophysics from UC Berkeley. I am excited to explore a range of fascinating scientific questions through research, science writing, art, animation, public outreach, and working with the science media. For more info, see my Bio, Resume, and CV.
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Gamma Ray Burst Energetics and Cosmology
   Gamma-Ray Bursts (GRBs) are the brightest known explosions in the universe, thought to result from the collapse of massive stars and the formation of neutron stars or black holes, in a process that produces a highly energetic beam of gamma radiation, occasionally at the right viewing angle to be seen from earth, followed by a bright, multiwavelength afterglow at optical and other wavelengths. My master's thesis work in the Harvard University Department of Astronomy with Professor Ramesh Narayan and Professor Joshua Bloom focused on testing the potential applications of Gamma-Ray Bursts for cosmology by studying GRB spectra and energetics. We found that GRBs are currently not well-suited for precision cosmology compared to other better studied standardizable candles such as Type Ia supernovae, underscoring the difficulty of developing cosmological distance determination methods with novel classes of astrophysical events.
Papers
Toward a More Standardized Candle Using GRB Energetics and Spectra, Friedman, A.S. & Bloom, J.S. 2005, The Astrophysical Journal, Vol. 627, Issue 1, pp. 1-25, (astro-ph/0408413) (DOI)

Present and Future Prospects for GRB Standard Candles, Friedman, A.S. & Bloom, J.S. 2005, Il Nuovo Cimento C, Vol. 028, Issue 04-05, pp. 669-672, (astro-ph/0502559) (DOI)

Talks
The Promise and Limitations of GRB Standard Candles, Graduate Student Research Forum, Harvard University, (March 14, 2006)

The Present and Future of GRB Cosmology, Supernova Acceleration Probe (SNAP) Science Meeting, Lawrence Berkeley National Laboratories, Berkeley, California, (July 15, 2005)

Toward a More Standardized Candle Using GRB Energetics and Spectra, High Energy Astrophysics Division (HEAD) Lunch Talk, Harvard-Smithsonian CfA, Cambridge, MA, (Feb 9, 2005)

The Present and Future of GRB Cosmography, AAS Meeting #205, San Diego, CA, (Jan 9-13, 2005)

“Using GRBs For Cosmology” by Andrew Friedman,Sky & Telescope, Vol. 112, No. 8, p35, 2006 [PDF] (with Robert Naeye article below)
“Gamma Ray Bursts: New Cosmic Rulers?” by Robert Irion atScience, Vol. 306, Issue 5694, pp. 215, Oct 8 2004 [PDF]
Posters
Toward a More Standardized Candle Using GRB Energetics and Spectra, 4th Workshop on Gamma-Ray Bursts in the Afterglow Era, Rome, Italy, (Oct 18-22, 2004)

Massachusetts Institute of Technology MIT Center for Theoretical Physics Institute for Quantum Optics and Quantum Information, Vienna University of California, San Diego UCSD Center for Astrophysics & Space Sciences Harvard University Astronomy Harvard-Smithsonian Center for Astrophysics UC Berkeley Astronomy National Science Foundation National Aernautics & Space Administration
Last Updated: Andrew Samuel Friedman, 2/2017

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This material is based upon work supported by the National Science Foundation under NSF Award #1056580 (2012-2014) through an NSF Science, Technology, and Society Postdoctoral Fellowship at MIT and the NSF INSPIRE program via NSF Award #1541160 (2015-2018).

Original animations are shared under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 US License