MAXI/GSC detection of 1ES 0033+595

ATel #4877; T. Kawamuro (Kyoto U.), S. Nakahira (JAXA), H. Negoro (Nihon U.), Y. Ueda, M. Shidatsu (Kyoto U.), M. Sugizaki (RIKEN), N. Kawai (Tokyo Tech), S. Ueno, H. Tomida, M. Kimura, M. Ishikawa (JAXA), M. Serino, K. Morihana, T. Yamamoto, J. Sugimoto, T. Takagi, T. Mihara, M. Matsuoka (RIKEN), M. Morii, R. Usui, K. Ishikawa (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Nakano (AGU), H. Tsunemi, M. Sasaki (Osaka U.), M. Nakajima, M. Asada (Nihon U.), K. Hiroi, R. Sato (Kyoto U.), Y. Tsuboi, M. Higa (Chuo U.), M. Yamauchi, Y. Nishimura, T. Hanayama, K. Yoshidome, Y. Ogawa (Miyazaki U.), K. Yamaoka (ISAS) report on behalf of the MAXI team
on 11 Mar 2013; 18:46 UT
Credential Certification: Megumi Shidatsu (shidatsu@kusastro.kyoto-u.ac.jp)

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MAXI/GSC detected an enhanced X-ray emission from the position consistent with that of the BL Lac object, 1ES 0033+595 (QSO B0033+595). On 2013 February 24, the source triggered the MAXI/GSC nova alert system working on the 4-d time scale. The significance was below the 90% confidence limit (corresponding to ~5 mCrab) at that time. On 2013 March 7 and 9, the source repeatedly triggered the alert system. Recent one-day average X-ray fluxes (2-10 keV) were 9.0+-2.6 mCrab, 5.3+-2.6 mCrab, 7.0+-2.5 mCrab, and 10.5+-2.5 on March 6, 7, 8, and 9, respectively. These fluxes are higher than those previously reported in the following literatures: 3 mCrab (2-10 keV) on 1999 Dec 18-19 by BeppoSAX (Costamante et al. 2001, A&A, 371, 512) and 0.5 mCrab (2-10 keV) on 2003 Feb 1 by XMM-Newton (Perlman et al. 2005, ApJ, 625, 727). The source flux had been usually below the MAXI/GSC 1-day detection limit of ~15 mCrab (5 sigma). This is the first detection of 1ES 0033+595 with the MAXI/GSC alert system. [More detailed information will be available at http://maxi.riken.jp/top/index.php?cid=1&jname=J0035+598 ]