Dynamic Sky: Palomar Transient Factory

Tuesday, March 26, 2013 at 5:00pm to 6:00pm

Rockefeller Hall, Schwartz Auditorium Central Campus

That occasionally new sources (“Stella Nova”) would pop up in the heavens was noted more than a thousand years ago. The earnest study of cosmic explosions began in earnest less than a hundred years ago. Stella Novae are now divided into two major families, novae and supernovae (with real distinct classes in each). Equally the variable stars have a rich phenomenology. Together, supernovae and variable stars have contributed richly to key problems in modern astrophysics: distances to galaxies, cosmography and build up of elements in the Universe.

The Palomar Transient Factory (PTF), an innovative 2-telescope system, was designed to explicitly to chart the transient sky witha particular focus on events which lie in the nova-supernova gap. PTF is now finding an extragalactic transient every 20 minutes and a Galactic (strong) variable every 10 minutes. The results so far: classification of 2000 supernovae, identification of an emerging class of ultra-luminous supernovae, the earliest discovery of a Ia supernovae, discovery luminous red novae, the most comprehensive UV spectroscopy of Ia supernovae, discovery low energy budget supernovae, clarification of sub-classes of core collapse and thermo-nuclear explosions, mapping of the systematics of core collapse supernovae, identification of a trove of eclipsing binaries and the curious AM CVns.

Event Type



Professor-at-Large Program







Contact E-Mail


Contact Name

Penny N. Dietrich

Contact Phone



Shri Kulkarni

Speaker Affiliation

John D. and Catherine T. MacArthur Professor of Astronomy and Planetary Science; Director, Caltech Optical Observatories

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