FIREBall: Initial Science Results from the First UV Fiber-fed Integral Field Spectrograph

Details FIREBall: Initial Science Results from the First UV Fiber-fed Integral Field Spectrograph FIREBall: Initial Science Results from the First UV Fiber-fed Integral Field Spectrograph

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21531506t&link_type=abstract

American Astronomical Society, AAS Meeting #215, #315.06; Bulletin of the American Astronomical Society, Vol. 42, p.316

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FIREBall flew successfully in June, 2009. The Faint Intergalactic Redshifted Emission Balloon is a unique ultraviolet experiment built to measure emission from the Intergalactic and Circumgalactic Medium. We combine a 1m telescope with the first fiber-fed UV integral field spectrograph, targeting Ly, OVI, and CIV. These measures of warm (105-6 K) and diffuse ( 1000, log NH -3) gas trace the interface between galaxies and the filamentary structure of the universe as shaped by dark matter and gravitational collapse.
The FIREBall spectrograph is fiber fed, providing 281 spectra, each 8” on the sky. This size is well matched to the physical sizes of gas surrounding galaxies, corresponding to 50-70 kpc at our intermediate redshift of 0.7. The spectrograph is a modified Offner mount design( f 2.5), incorporating a R=4800 convex grating with a GALEX designed microchannel plate (MCP) detector. The atmospherically limited bandpass ( 150A) allows access to a single redshift range for each line or doublet. Design and performance of the spectrograph will be discussed.
I also present the first results of a blind search for emission conducted on our two IGM fields - subfields of DEEP2 and the Extended Groth Strip, as well as a field surrounding a quasar with known LOS absorbers. Both IGM fields were selected to target galactic overdensities with good redshift coverage and possible filamentary structure in our band. Search techniques include direct detection, pixel luminosity statistics, and photon power spectrum analysis.

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