TITLE: GCN CIRCULAR NUMBER: 2663 SUBJECT: GRB040825B: optical observations DATE: 04/08/26 04:38:55 GMT FROM: Adalberto Piccioni at Astronomy, Bologna U. This is a multi-part message in MIME format. --------------5049425646197D90B8C08B21 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit A. Piccioni, C. Bartolini, A. Guarnieri, G. Greco (Bologna University), P. Ferrero (IASF-CNR, Bologna; Osservatorio e Universita' di Teramo), G. Pizzichini (IASF-CNR, Sezione di Bologna), F. Giovannelli (IASF-CNR, Sezione di Roma) and R. Gualandi (Osservatorio di Bologna) report: We observed the error box of GRB040825B (HETE trigger 3510, GCN 2662, Urata et al.) with the 152 cm Loiano Telescope and the BFOSC camera system on August 25, in non optimal sky conditions (seeing ~3.5 arcsec). The field has been divided in two subfields centered at the coordinates: 22hh 46mm 40ss; -2deg 21arcmin 42arcsec and approximately 22hh 46mm 38ss; -2deg 28arcmin, respectively. We got 5X300s images with Rc filter of each subfield at mean UT 25.96076 and 25.99013, respectively. The magnitude limit, estimated by aperture photometry, is approximately 19.5. By comparison of the coadded images with the corresponding DSS-2 field we do not find any obvious OT source in agreement with Price and McNaugth, (GCN 2657), whose limit was deeper and at an earlier epoch. The coadded images and the observation log will be posted into a public directory from where it will be possible to retrieve by sftp using the hostname: ermione.bo.astro.it, username: publicGRB, password: GRB_bo and directory: GRB040825B. --------------5049425646197D90B8C08B21 Content-Type: text/x-vcard; charset=us-ascii; name="piccioni.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Piccioni Adalberto Content-Disposition: attachment; filename="piccioni.vcf" begin:vcard n:Adalberto;Piccioni x-mozilla-html:FALSE org:Dipartimento di Astronomia version:2.1 email;internet:piccioni@ermione.bo.astro.it title:prof. x-mozilla-cpt:;0 fn:Piccioni Adalberto end:vcard --------------5049425646197D90B8C08B21--