Imagine the Universe!

Paul Nandra's Current Research

Paul has a lot of new research underway. Currently, he's working on 3 main projects. For two of them he's using RXTE to study how rapidly the X-ray output from active galaxies varies; the amount of X-ray light we see from an active galaxy can change in a matter of seconds, which is truly amazing for something that size.

The third project Paul's working on involves examining ASCA images of previously unknown energetic X-ray objects. "The idea behind the first two projects is to try and work out why and how X-rays are given off from near black holes in the middle of galaxies," Paul says. The idea behind the third project is, "to look for 'hidden' black holes in galaxies shrouded in dust and gas. The X-rays can penetrate through these and reveal the black hole swallowing up matter" at the center of these galaxies.

artist's
conception of the center of an active galaxy
Artist's Conception of the Center
of an Active Galaxy

* Tell me about a recent black hole discovery Paul made with RXTE!

artist concept of RXTE

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Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

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Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
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This page last updated: Wednesday, 17-Nov-2004 15:33:01 EST