579 citations · 2.9k across the 54 of their papers we have counts for
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astro-ph.HE2015★ 12 cited
Discovery of a second outbursting hyperluminous X-ray source
M. Heida, P. G. Jonker, M. A. P. Torres
We report on six Chandra and one HST/WFC3 observation of CXO J122518.6+144545, discovered by Jonker et al. (2010) as a candidate hyperluminous X-ray source (HLX), X-ray bright supe…
astro-ph.HE2015★ 45 cited
Discovery of a red supergiant counterpart to RX~J004722.4-252051, a ULX in NGC 253
M. Heida, M. A. P. Torres, P. G. Jonker +6
We present two epochs of near-infrared spectroscopy of the candidate red supergiant counterpart to RX~J004722.4-252051, a ULX in NGC 253. We measure radial velocities of the object…