Authors: Abuter, R.; Amorim, A.; Bauböck, M.; Baganoff, F.; Berger, J.; Boyce, H.; Bonnet, H.; Brandner, W.; Clénet, Y.; Davies, R.; de Zeeuw, P.; Dexter, J.; Dallilar, Y.; Drescher, A.; Eckart, A.; Eisenhauer, F.; Fazio, G.; Förster Schreiber, N.; Foster, K.; Gammie, C.; Garcia, P.; Gao, F.; Gendron, E.; Genzel, R.; Ghisellini, G.; Gillessen, S.; Gurwell, M.; Habibi, M.; Haggard, D.; Hailey, C.; Harrison, F.; Haubois, X.; Heißel, G.; Henning, T.; Hippler, S.; Hora, J.; Horrobin, M.; Jiménez-Rosales, A.; Jochum, L.; Jocou, L.; Kaufer, A.; Kervella, P.; Lacour, S.; Lapeyrère, V.; Le Bouquin, J.; Léna, P.; Lowrance, P.; Lutz, D.; Markoff, S.; Mori, K.; Morris, M.; Neilsen, J.; Nowak, M.; Ott, T.; Paumard, T.; Perraut, K.; Perrin, G.; Ponti, G.; Pfuhl, O.; Rabien, S.; Rodríguez-Coira, G.; Shangguan, J.; Shimizu, T.; Scheithauer, S.; Smith, H.; Stadler, J.; Stern, D.; Straub, O.; Straubmeier, C.; Sturm, E.; Tacconi, L.; Vincent, F.; von Fellenberg, S.; Waisberg, I.; Widmann, F.; Wieprecht, E.; Wiezorrek, E.; Willner, S.; Witzel, G.; Woillez, J.; Yazici, S.; Young, A.; Zhang, S.; Zins, G.; Gravity Collaboration

Venue: Astronomy & Astrophysics

Type: Publication

Abstract: We report the time-resolved spectral analysis of a bright near-infrared and moderate X-ray flare of Sgr A⋆. We obtained light curves in theM,K, andHbands in the mid- and near-infrared and in the 2 − 8 keV and 2 − 70 keV bands in the X-ray. The observed spectral slope in the near-infrared band isνLν ∝ ν0.5 ± 0.2; the spectral slope observed in the X-ray band isνLν ∝ ν−0.7 ± 0.5. Using a fast numerical implementation of a synchrotron sphere with a constant radius, magnetic field, and electron density (i.e., a one-zone model), ... (read more)

Impact:   4.064267E-8    3.5811654E-9    50    40  / Attention: 0 40

DOI: 10.1051/0004-6361/202140981