===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sat May 9 01:22:00 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n495Lunt029571; Sat, 9 May 2009 01:21:57 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n495Ls6c029568 for ; Sat, 9 May 2009 01:21:54 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n495Lsg3029567; Sat, 9 May 2009 01:21:54 -0400 Date: Sat, 9 May 2009 01:21:54 -0400 Message-Id: <200905090521.n495Lsg3029567@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: Swift detection of a burst X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9325 SUBJECT: GRB 090509: Swift detection of a burst DATE: 09/05/09 05:21:22 GMT FROM: Scott Barthelmy at NASA/GSFC D. Grupe (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU), H. A. Krimm (CRESST/GSFC/USRA), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), J. L. Racusin (PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 05:10:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 090509 (trigger=351525). Swift did not slew to this burst. The BAT on-board calculated location is RA, Dec 241.404, -28.404 which is RA(J2000) = 16h 05m 37s Dec(J2000) = -28d 24' 12" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows multiple peaks with a duration of about 30 sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~20 sec after the trigger. Due to the Moon observing constraint, Swift cannot slew to the BAT position until May 12. There will thus be no XRT or UVOT data for this trigger. Burst Advocate for this burst is D. Grupe (grupe AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.) _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sat May 9 02:01:39 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4961cRD031681; Sat, 9 May 2009 02:01:38 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4961adu031678 for ; Sat, 9 May 2009 02:01:36 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4961a8a031676; Sat, 9 May 2009 02:01:36 -0400 Date: Sat, 9 May 2009 02:01:36 -0400 Message-Id: <200905090601.n4961a8a031676@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: GROND afterglow candidate X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9326 SUBJECT: GRB 090509: GROND afterglow candidate DATE: 09/05/09 06:00:25 GMT FROM: Thomas Kruehler at MPE/MPI F. Olivares, J. Greiner, T. Kruehler (all MPE Garching) and S. Klose (TLS) report on behalf of the GROND team: We observed the field of GRB 090509 (Swift trigger 351525; Grupe et al., GCN #9325) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m ESO/MPI telescope at La Silla Observatory (Chile). We detect a bright uncatalogued source in all bands at 16:05:39.01 -28:23:59.7 with a magnitude of r' = 17.9 at 15 min after the burst, calibrated using the GROND zeropoint. _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sat May 9 02:05:12 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4965C4I031890; Sat, 9 May 2009 02:05:12 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n49659SI031886 for ; Sat, 9 May 2009 02:05:09 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n49659vR031884; Sat, 9 May 2009 02:05:09 -0400 Date: Sat, 9 May 2009 02:05:09 -0400 Message-Id: <200905090605.n49659vR031884@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: REM NIR afterglow X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9327 SUBJECT: GRB 090509: REM NIR afterglow DATE: 09/05/09 06:03:38 GMT FROM: Stefano Covino at Brera Astronomical Observatory S. Covino, P. D'Avanzo, L.A. Antonelli, D. Malesani, D. Fugazza, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F. D'Alessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, E. Maiorano, N. Masetti, A. Melandri, E.J.A. Meurs, L. Nicastro, E. Palazzi, E. Pian, S. Piranomonte, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani, F. Vitali report on behalf of the REM team: The robotic 60-cm REM telescope located at La Silla (Chile) observed automatically the field of the GRB 090509 (Grupe et al. GCN9325) starting about 3min after the burst. We detect a fading object in the BAT error circle in our first H-band images at R~14.3 at coordinates: RA(J2000) 16:05:38.99; Dec(J2000) -28:23:58.7 with 1 arcsec error. Moon is only at about 15 deg preventing useful optical observations. _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sat May 9 08:32:11 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n49CW80P023748; Sat, 9 May 2009 08:32:09 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n49CW7HE023743 for ; Sat, 9 May 2009 08:32:07 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n49CW7iJ023742; Sat, 9 May 2009 08:32:07 -0400 Date: Sat, 9 May 2009 08:32:07 -0400 Message-Id: <200905091232.n49CW7iJ023742@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: GROND further analysis and redshift limit X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9328 SUBJECT: GRB 090509: GROND further analysis and redshift limit DATE: 09/05/09 12:31:34 GMT FROM: Thomas Kruehler at MPE/MPI F. Olivares, T. Kruehler (MPE Garching), S. Klose (Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team: In addition to our previous GCN (Olivares et al., GCN #9326) we report here the observed preliminary magnitudes (in the AB system) for the afterglow (GCN #9326 and Covino et al., GCN #9327) of GRB 090509 (Grupe et al., GCN #9325). Based on 8 min of effective exposure starting at 5:22 UT (12 minutes after the trigger), we measure g = 18.12 +/- 0.01 r = 17.75 +/- 0.01 i = 17.48 +/- 0.01 z = 17.22 +/- 0.01 J = 16.87 +/- 0.07 H = 16.57 +/- 0.12 K = 16.31 +/- 0.17 The quoted error is statistical only. There is an additional systematic error from the calibration against the GROND zeropoints and 2MASS field stars which is expected to be in the 0.1 mag range. After correcting for a Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.206 mag (Schlegel et al.), the g' to K band is well described with a single power law. This implies, that Lyman alpha is below or very close to the blue edge of the g' band, and constrains the redshift to smaller than z < 3.0 (90% confidence limit). _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sat May 9 22:07:05 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4A273Cq009205; Sat, 9 May 2009 22:07:03 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4A2712f009199 for ; Sat, 9 May 2009 22:07:02 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4A271tF009197; Sat, 9 May 2009 22:07:01 -0400 Date: Sat, 9 May 2009 22:07:01 -0400 Message-Id: <200905100207.n4A271tF009197@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509, SMARTS optical/IR afterglow observations X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9333 SUBJECT: GRB 090509, SMARTS optical/IR afterglow observations DATE: 09/05/10 02:05:34 GMT FROM: Bethany Cobb at UC Berkeley B. E. Cobb (UC Berkeley) reports: Using the ANDICAM instrument on the 1.3m telescope at CTIO, we obtained optical/IR imaging of the error region of GRB 090509 (Grupe et al. GCN 9325) beginning approximately 0.8 hours post-burst (2009-05-09 05:59 UT). Several dithered images were obtained in each filter, with total summed exposure times of 180s in each of BRIJK and 120s in each of H and V. The GRB afterglow (Olivares et al. GCN 9326, Covino et al. GCN 9327) is detected in all filters with the following magnitudes at a mid-exposure time of 2009-05-09 06:14 UT (1.07 hours post-burst): B= 20.18 +/- 0.13 V= 19.68 +/- 0.16 R= 19.02 +/- 0.10 I= 18.76 +/- 0.09 J= 17.70 +/- 0.16 H= 17.07 +/- 0.15 K= 16.48 +/- 0.22 (Optical photometry is calibrated against Landolt standard stars and IR photometry is calibrated against 2MASS stars in the field.) _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Sun May 10 01:42:28 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4A5gQ8v018225; Sun, 10 May 2009 01:42:26 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4A5gPU1018222 for ; Sun, 10 May 2009 01:42:25 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4A5gPKM018219; Sun, 10 May 2009 01:42:25 -0400 Date: Sun, 10 May 2009 01:42:25 -0400 Message-Id: <200905100542.n4A5gPKM018219@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: Swift-BAT refined analysis X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9335 SUBJECT: GRB 090509: Swift-BAT refined analysis DATE: 09/05/10 05:41:38 GMT FROM: Scott Barthelmy at NASA/GSFC J. Tueller (GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 090509 (trigger #351525) (Grupe, et al., GCN Circ. 9325). The BAT ground-calculated position is RA, Dec = 241.426, -28.420 deg, which is RA(J2000) = 16h 05m 42.3s Dec(J2000) = -28d 25' 12.6" with an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 29%. The mask-weighted light curve shows multiple overlapping peaks starting at ~T-4 sec, peaking at ~T+21 sec, and ending at ~T=3 sec. T90 (15-350 keV) is 20.4 +- 1.7 sec (estimated error including systematics). The time-averaged spectrum from T-1.1 to T+22.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.54 +- 0.16. The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+20.73 sec in the 15-150 keV band is 1.5 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/351525/BA/ _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Mon May 11 13:16:42 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4BHGdlC030927; Mon, 11 May 2009 13:16:40 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4BHGa5p030924 for ; Mon, 11 May 2009 13:16:36 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4BHGaWi030921; Mon, 11 May 2009 13:16:36 -0400 Date: Mon, 11 May 2009 13:16:36 -0400 Message-Id: <200905111716.n4BHGaWi030921@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509, further Swift-BAT refined analysis X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9349 SUBJECT: GRB 090509, further Swift-BAT refined analysis DATE: 09/05/11 17:15:49 GMT FROM: Hans Krimm at NASA-GSFC H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), and J. R. Cummings (GSFC/UMBC) for the Swift-BAT team. Here we report on further analysis of GRB 090509 (Grupe et al., GCN Circ. 9325) based on additional event data received since GCN Circ. 9335 (Tueller et al.) was issued. The results given here supersede those from GCN Circ. 9335. Using the data set from T-239 to T+316 sec from the recent telemetry downlink, we report further analysis of BAT GRB 090509 (trigger #351525). The BAT ground-calculated position is RA, Dec = 241.422, -28.385 deg which is RA(J2000) = 16h 05m 41.3s Dec(J2000) = -28d 23' 04.4" with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 29%. The mask weighted light curve consists of two sets of peaks widely separated in time. The first complex contains multiple overlapping peaks starting at ~T-4 sec, peaking at ~T+21 sec, and ending at ~T+40 sec. The second complex also contains multiple overlapping peaks starting at ~T+240 sec, peaking at ~T+250 sec and continuing until at least ~T+300 sec, when a pre-planned slew caused the source to move out of the BAT field of view. However until ~T+950 sec the source was at a location outside the field of view where high energy (> 50 keV) photons from the source could have penetrated the BAT shield and contributed to the non-maskweighted light curve. Examination of the raw light curve shows no additional peaks comparable in intensity to those described above. We cannot rule out weak source activity or activity below about 50 keV. Based on the available data, T90 (15-350 keV) is 335 +- 32 sec (estimated error including systematics). The time-averaged spectrum from T-62.6 to T+298.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.75 +- 0.20. The fluence in the 15-150 keV band is 3.3 +- 0.4 x 10-6 erg/cm2. The 1-sec peak photon flux measured from T+20.73 sec in the 15-150 keV band is 1.5 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/351525/BA/ _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Wed May 13 16:08:35 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4DK8Vjk010114; Wed, 13 May 2009 16:08:32 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4DK8S1H010035 for ; Wed, 13 May 2009 16:08:28 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4DK8SQV010032; Wed, 13 May 2009 16:08:28 -0400 Date: Wed, 13 May 2009 16:08:28 -0400 Message-Id: <200905132008.n4DK8SQV010032@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GCN Report 216.1: Final Results on Swift GRB 090509 X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html GCN_Report 216.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_216_1.pdf by D. Gruppe at PSU titled: "Final Results on Swift GRB 090509" _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Fri May 15 07:29:54 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4FBToSt004521; Fri, 15 May 2009 07:29:51 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4FBTmNv004516 for ; Fri, 15 May 2009 07:29:48 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4FBTmLW004512; Fri, 15 May 2009 07:29:48 -0400 Date: Fri, 15 May 2009 07:29:48 -0400 Message-Id: <200905151129.n4FBTmLW004512@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509 - Zadko Telescope observations X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9363 SUBJECT: GRB 090509 - Zadko Telescope observations DATE: 09/05/15 11:29:00 GMT FROM: David Coward at U of Western Aus. SUBJECT: GRB 090509 - Zadko Telescope observations FROM: D.M Coward at UWA Liang Yan and A. Imerito report on behalf of the Zadko Telescope Team: D.M. Coward, Liang Yan, A. Imerito, T.P. Vaalsta, A. Ahmet, J. Zadko, D. Blair, R. Burman, P. Luckas, S. Gordon, K. Frost, A. Fletcher, J. Moore (University of Western Australia) M. Todd, M. Zadnik (Curtin University) M. Boer, A. Klotz (TAROT) The 1 m Zadko Telescope team observed the field of GRB 090509 (trigger=351525, D. Grupe et al. GCN 9325) 8hr after the Swift trigger. We stacked 48x5s unfiltered images of the field from 13:10:32 to 13:24:16 UT (2009-05-09) No candidate afterglow was observed at the GROND position (GCN 9326) nor at the BAT-refined position (GCN 9349), down to an Rmag of approx. 17.6. (The OA magnitude limit was estimated by comparing nearby USNO-B1 reference stars.) The Zadko Telescope is currently being commissioned. This message is quotable in publications Dr David Coward Senior Research Fellow School of Physics University of Western Australia Crawley WA 6009 Tel: +61 8 6488 4563 Mobile 0423981240 Fax: +61 8 6488 1170 _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE ===== ===== BEGIN MESSAGE ===== From aavso-hen-bounces@aavso.org Fri May 15 11:34:06 2009 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mira.aavso.org X-Spam-Level: X-Spam-Status: No, score=-1.4 required=2.5 tests=ALL_TRUSTED autolearn=disabled version=3.2.5 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4FFY5jA020662; Fri, 15 May 2009 11:34:06 -0400 Received: from mira.aavso.org (localhost.localdomain [127.0.0.1]) by mira.aavso.org (8.14.3/8.14.3) with ESMTP id n4FFY40Z020656 for ; Fri, 15 May 2009 11:34:04 -0400 Received: (from grb@localhost) by mira.aavso.org (8.14.3/8.14.3/Submit) id n4FFY4VR020654; Fri, 15 May 2009 11:34:04 -0400 Date: Fri, 15 May 2009 11:34:04 -0400 Message-Id: <200905151534.n4FFY4VR020654@mira.aavso.org> To: aavso-hen@aavso.org From: grb@aavso.org Subject: [AAVSO-HEN] GRB 090509: Fermi GBM observation X-BeenThere: aavso-hen@aavso.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: AAVSO High Energy Network List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: aavso-hen-bounces@aavso.org Errors-To: aavso-hen-bounces@aavso.org The following is a GCN Circular circulated via the AAVSO network. For an archive and more information on circulars visit: http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html TITLE: GCN CIRCULAR NUMBER: 9366 SUBJECT: GRB 090509: Fermi GBM observation DATE: 09/05/15 15:33:09 GMT FROM: Andreas von Kienlin at MPE A. von Kienlin (MPE) and Sheila McBreen (UCD/MPE) report on behalf of the Fermi GBM Team: "At 05:10:05.72 UT on 09 May 2009, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 090509 (trigger 263538607 / 090509215) which was also detected by the SWIFT-BAT (Grupe et al. 2008, GCN 9325; Krimm et al., GCN 9349). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 75 degrees. The GBM light curve consists of two widely separated multi-peaked emission periods with a duration (T90) of about 295 s (8-1000 keV). The time-averaged spectrum of the first emission complex from T0-3.072 to T0+24.576 s is well fit by a power law function with an exponential high energy cutoff. The power law index is -0.90 +/- 0.16 and the cutoff energy, parameterized as Epeak, is 343 +/- 93 keV (chi squared 375 for 360 d.o.f.). The time-averaged spectrum of the second emission complex from T0+239.619 s to T0+288.772 s is best fit by a simple power law function with index -1.55 +/- 0.07 (chi squared 328 for 361 d.o.f.). The summed event fluence (8-1000 keV) of both time intervals is (8.4 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+18.432 s in the 8-1000 keV band is 3.1 +/- 0.3 ph/s/cm^2. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog." _______________________________________________ Aavso-hen mailing list Aavso-hen@aavso.org To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-hen The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers. ===== END MESSAGE =====