NGC 4190-ULX1: The forgotten ULX

Details NGC 4190-ULX1: The forgotten ULX NGC 4190-ULX1: The forgotten ULX

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2269r&link_type=abstract

Chandra Proposal ID #08620555

Astronomy and Astrophysics

Astronomy

Chandra Proposal Id #08620555

Scientific paper

Although it ranks amongst the nearest (at d ~ 3 Mpc) and brightest (fx ~ 2e-12 erg/cm^2/s) ULXs, NGC 4190-ULX1 has not yet been observed in the modern era of X-ray astronomy. We propose to remedy this omission with three new observations designed to probe its underlying nature. Firstly, we will obtain a high precision X-ray position of the ULX using HRC-I. This will be used to identify an unique counterpart in new HST/ACS imaging, plausibly the first step towards deriving a dynamical mass function for this source. Finally, we will use an ACIS-S observation to derive the first high quality X-ray diagnostics (spectrum, light curve) of this ULX, with the aim of providing an interim assessment of the nature of the compact object underlying its extreme X-ray emission.

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