NICMOS Observations of Transient Infrared Jets in the Galactic Microquasar GRS1915+105

Details NICMOS Observations of Transient Infrared Jets in the Galactic Microquasar GRS1915+105 NICMOS Observations of Transient Infrared Jets in the Galactic Microquasar GRS1915+105

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9423e&link_type=abstract

HST Proposal ID #9423

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #9423

Scientific paper

We propose to use HST/NICMOS to make Target of Opportunity observations of the galactic microquasar GRS1915+105. This source possesses transient radio jets which exhibit apparent superluminal motions, and resolved infrared emission from these jets has been observed in GRS1915+105 {Sams, Eckart, and Sunyaev, 1996; Eikenberry and Fazio, 1996}. Because the jet ejection events are correlated with X-ray outbursts, we will use observations of X-ray flares with the Rossi X-Ray Timing Explorer to trigger the HST observations. We will then monitor GRS1915+105 periodically with NICMOS, obtaining relative astrometry, photometry, polarimetry, and grism spectroscopy of the jets and the parent object. These observations will allow us to greatly increase our understanding of the jets' radiative mechanisms and physical conditions, and their evolution with time. We require the capabilities of HST and NICMOS due to the small angular separations between the jets and the parent object {increasing from 0.1 to 0.8 arcsec over the span of the TOO observations} and the high reddening towards GRS1915+105 {A_V 30 mag}.

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