IXPE detects a remarkably high X-ray Polarization Degree in a faint hard state of IGR J17091-3624 #17093
: Parra, M.; Dovciak, M.; Ewing, M.; Mastroserio, G.; Del Santo, M.; Garcia, J.; Veledina, A.; Ingram, A.; Matt, G.; Bianchi, S.; Petrucci, P.-O.; Gandhi, P.; Shidatsu, M.; Russell, T.
: 2025
: Astronomer’s Telegram
: Astronomer's Telegram
: 17093
: 1920-406X
: https://www.astronomerstelegram.org/?read=17093
The Black Hole X-ray candidate IGR J17091-3624, first detected in 2003 (ATel #149) and well known for its recurrent outbursts and exotic variability patterns reminiscent of GRS 1915+105 (Altamirano et al. 2011, ApJL, 742, L17; Court et al. 2017, MNRAS, 468, 4748; Wang et al., ApJ 963, 14, +2024), was detected to undergo a new outburst in early February (ATels #17034, #17038, #17065).
