AAS 205th Meeting, 9-13 January 2005
Session 102 Neutron Stars
Poster, Wednesday, January 12, 2005, 9:20am-6:30pm, Exhibit Hall

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[102.16] InFOC\muS Hard X-ray Observations of Her X-1 and Cyg X-1

H.A. Krimm (USRA / NASA GSFC), J. Tueller, S.D. Barthelmy (NASA GSFC), T. Okajima (JHU / NASA GSFC), A. Furuzawa, Y. Ogasaka, R. Shibata, K. Tamura, Y. Tawara, K. Yamashita (Nagoya University), H. Kunieda (JAXA/ISAS), M. Rex (University of Pennsylvania)

The InFOC\muS hard X-ray telescope was flown successfully on a high altitude balloon launched from Fort Sumner, NM on Sep. 16-17, 2004. We made a 3500 second observation of Hercules X-1 and a 10000 second observation of Cygnus X-1. Both sources were detected. Flux values and spectral analysis will be presented for these sources, along with the methodology used to derive the results. In its current configuration, the InFOC\muS telescope has a single grazing incidence mirror with an 8-m focal length and 2040 fully multilayered reflectors. It has an effective area of 49 cm2 at 30 keV and half-power diameter of 2.61 arc minutes. The nominal energy bandpass for mirror and detector is 20-40 keV. The focal plane is a pixellated CdZnTe detector and an active anti-coincidence shield is used to reduce the background. The pointing system has been completely redesigned since its 2001 maiden flight.

This work was sponsored by NASA under the SR & T program.

If you would like more information about this abstract, please follow the link to http://lheawww.gsfc.nasa.gov/docs/balloon/FOCUS.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: krimm@milkyway.gsfc.nasa.gov

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© 2004. The American Astronomical Society.