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Return-Path: <atel@astronomerstelegram.org> Delivered-To: stefano@bicar.it Received: by mail.planetcloud-host.com (Postfix, from userid 99) id 4171914AF9; Sat, 31 Jan 2026 08:07:06 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.planetcloud-host.com X-Spam-Level: X-Spam-Status: No, score=-0.0 required=5.0 tests=RCVD_IN_DNSWL_BLOCKED, RCVD_IN_VALIDITY_RPBL_BLOCKED,RCVD_IN_VALIDITY_SAFE_BLOCKED,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=174.142.199.243; helo=server.astronomerstelegram.org; envelope-from=atel@astronomerstelegram.org; receiver=stefano@bicar.it Received: from server.astronomerstelegram.org (astronomerstelegram.org [174.142.199.243]) by mail.planetcloud-host.com (Postfix) with ESMTP id AACDF1449C for <stefano@bicar.it>; Sat, 31 Jan 2026 08:06:20 +0100 (CET) Received: from server.astronomerstelegram.org (localhost [127.0.0.1]) by server.astronomerstelegram.org (Postfix) with ESMTP id 31B11288085E for <stefano@bicar.it>; Sat, 31 Jan 2026 02:06:19 -0500 (EST) To: stefano@bicar.it From: atel@astronomerstelegram.org Subject: ATel 17639 Message-Id: <20260131070619.31B11288085E@server.astronomerstelegram.org> Date: Sat, 31 Jan 2026 02:06:19 -0500 (EST) ------------------------------------------------------------------------------ The Astronomer's Telegram is free to read, free to publish, free to use. Thanks to the support of our patrons, we can continue to keep it free. https://www.patreon.com/astronomerstel ------------------------------------------------------------------------------ The Astronomer's Telegram http://www.astronomerstelegram.org ------------------------------------------------------------------------------ Posted: Within the last 24 hours ============================================================================== ATEL #17639 ATEL #17639 Title: Important NIR brightening of the Quasar OJ49 Author: L. Carrasco, L. Felix , G. Escobedo, A. Porras, E. Recillas; (INAOE, Mexico) Queries: Carrasco@inaoep.mx Posted: 30 Jan 2026; 19:17 UT Subjects:Radio, Infra-Red, Optical, Gamma Ray, AGN, Quasar, Transient We report on a significant NIR brightening of the low redshift (z=0.1738) Quasar OJ49 cross identified with the radio source PKS0829+046 and the gamma-ray source 2FGLJ0828+0429. On January 21st,2026 (JD2461062.0087) we found the source with enhanced NIR fluxes, corresponding to J = 13.06 +/- 0.03, H = 12.21 +/- 0.04 and Ks = 11.58 +/- 0.04, while on JD2461020.9522, the NIR fluxes corresponded to J = 14.53 +/- 0.04, H = 13.35 +/- 0.04 and Ks = 12.68 +/- 0.03. Hence, the source has increased its flux in the J band by a factor of 4 a lapse of 41 days. Our observations are carried out with the 2.1m telescope of the Guillermo Haro Observatory operated by the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We encourage further multi wavelength coverage. ------------------------------------------------------------------------------ Password Certification: LUIS CARRASCO (carrasco@inaoep.mx) https://www.astronomerstelegram.org/?read=17639 ============================================================================== ============================================================================== This is an automatically-generated notice. You can remove yourself permanently from receiving both the Daily Email Digest and Instant Email Notices from The Astronomer's Telegram by following this link: https://www.astronomerstelegram.org?unsubscribe&confirmation=a803d34e7ea924f9a4142bac00763549&address=stefano@bicar.it
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