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AT 2016blu: Accretion-powered Outbursts in a Luminous Blue Variable and Compact Object Binary

  • Authors: Mojgan Aghakhanloo, Núria Torres-Albà, Nathan Smith, Raphael Baer-Way, Shazrene Mohamed, Alexei V. Filippenko, WeiKang Zheng, Thomas G. Brink, D. Andrew Howell, Brian Hsu, Moira Andrews, Joseph R. Farah, Curtis McCully, Kathryn Wynn, Réka Könyves-Tóth, Conor L. Ransome, Enrique Rathmann, Tamás Tordai, Sjoerd Dufoer, Charles Cynamon, Franz-Josef Hambsch, Thomas Rutherford, Simone Leonini, Franky Dubois, Ivo Peretto, Donald F. Collins, Lorenzo Betti, Lara Fossi, Irene Parenti, Vincenzo Pettina, Giulio Giordano Chiti, Maria Hofheinz, André Steenkamp, Sauro Gaudenzi, Nikola Antonov, Giuseppe Pappa

Mojgan Aghakhanloo et al 2026 The Astrophysical Journal 1011 .

  • Provider: AAS Journals

Caption: Figure 1.

Left: Stacked Chandra image of all five target-of-opportunity observations taken during the 2026 March optical outburst of AT 2016blu, in a span of 4 days, as listed in Table 1. The magenta circle shows a 2″ radius region around the optical Transient Name Server position of AT 2016blu, while the green circle corresponds to a 5″ radius region highlighting the position of the nearby ULX NGC 4559 X7. Right: XMM-Newton image of the same sky region. XMM-Newton cannot resolve the two sources, and the image is clearly dominated by ULX NGC 4559 X7, much brighter than AT 2016blu.

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