文件操作 - 1750489543.M357458P1085.mail.planetcloud-host.com,S=5310,W=5399:2,
返回文件管理
返回主菜单
删除本文件
文件: /var/vmail/bicar.it/stefano/cur/1750489543.M357458P1085.mail.planetcloud-host.com,S=5310,W=5399:2,
编辑文件内容
Return-Path: <atel@astronomerstelegram.org> Delivered-To: stefano@bicar.it Received: by mail.planetcloud-host.com (Postfix, from userid 1016) id 4852A14EBE; Sat, 21 Jun 2025 09:05:43 +0200 (CEST) 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=7.0 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 420AB1470B for <stefano@bicar.it>; Sat, 21 Jun 2025 09:05:40 +0200 (CEST) Received: from server.astronomerstelegram.org (localhost [127.0.0.1]) by server.astronomerstelegram.org (Postfix) with ESMTP id 98E9E288029F for <stefano@bicar.it>; Sat, 21 Jun 2025 03:05:39 -0400 (EDT) To: stefano@bicar.it From: atel@astronomerstelegram.org Subject: ATel 17239 Message-Id: <20250621070539.98E9E288029F@server.astronomerstelegram.org> Date: Sat, 21 Jun 2025 03:05:39 -0400 (EDT) ------------------------------------------------------------------------------ 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 #17239 ATEL #17239 Title: MeerKAT monitoring of the flaring CSO PMN J1603-4904 Author: G. Bruni (INAF-IAPS), M. Brienza, G. Migliori, M. Giroletti, E. Liuzzo (INAF-IRA), E. Bronzini (U. Bologna & INAF-OAS), M. Kadler (U. Wuerzburg), L. Hernandez-Garcia (U. Valparaiso), F. Panessa, J. Rodi (INAF-IAPS), E. Torresi, P. Da Vela (INAF-OAS), M. Cerruti (U. Paris Cite), P. Goswami (U. Heidelberg), C. Reynolds (CSIRO) Queries: gabriele.bruni@inaf.it Posted: 20 Jun 2025; 08:12 UT Subjects:Radio, VHE, AGN The radio source PMN J1603-4904 has long defied classification within the AGN framework. While its GeV emission, detected with Fermi/LAT (1FHL, Ackermann et al. 2013, ApJS, 209, 34), suggests a jet oriented towards the observer - i.e., a blazar - multiwavelength studies, including VLBI imaging (Mueller et al. 2014, A&A, 562, A4), instead point to a young, misaligned radio galaxy, specifically a compact symmetric object (CSO). Its recent detection in the VHE regime by H.E.S.S. (Wagner et al. 2025, ATel #17205) opens new avenues for understanding high-energy processes in compact radio galaxies, a phenomenon previously observed in only one other CSO with LHAASO (NGC 4278, Cao et al. 2024, ApJS, 271, 25). Following the H.E.S.S. collaboration call for multiwavelength follow-up by the broader community, we initiated a MeerKAT monitoring campaign to investigate a possible radio brightening of PMN J1603-4904 (DDT-20250604-GB-01, P.I. Bruni). Observations were conducted on 14 June 2025 at 3 GHz (S4 band), with 15 minutes on-source. Phase referencing was applied, and data were reduced using the SARAO Science Data Processor (SDP) continuum pipeline. The resulting image has an angular resolution of 4.66 x 3.82 arcsec, P.A. 53.2 deg, and an RMS noise level of 31 uJy/beam. As expected, the source appears unresolved, with a measured flux density of 1.39 +/- 0.07 Jy, taken 21 days after the H.E.S.S. detection. PMN J1603-4904 serves as a radio calibrator and is included in the ATCA calibrator database. It was observed in September 2024 at 2.1 and 5.5 GHz, showing flux densities of 1.537 +/- 0.019 Jy and 1.088 +/- 0.016 Jy, respectively (https://www.narrabri.atnf.csiro.au/calibrators/calibrator_database_viewcal.html?source=1600-48). These values yield a spectral index of -0.36 +/- 0.02 between 2.1 and 5.5 GHz, which interpolates to an expected flux density of 1.36 +/- 0.02 Jy at 3 GHz. Therefore, the flux density measured with MeerKAT is consistent with the pre-flare baseline. A second MeerKAT epoch is scheduled for the end of June, when the VHE observing window - closed during the first epoch due to lunar constraints - will once again be open. ------------------------------------------------------------------------------ Password Certification: Gabriele Bruni (gabriele.bruni@inaf.it) https://www.astronomerstelegram.org/?read=17239 ============================================================================== ============================================================================== 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
修改文件时间
将文件时间修改为当前时间的前一年
删除文件