We shall cancel observation BT 75 D on December 28, because the source appears to be too weak at the moment. We will attempt to reschedule in early summer. If the source remains too weak at that time, the proposers should resubmit the proposal; we are concerned that the refereeing of this two year old proposal may be becoming out of date. >> From atarchi@ira.inaf.it Wed Dec 7 06:27:39 2005 >> Return-Path: >> Date: Wed, 7 Dec 2005 15:50:22 -0100 (GMT+1) >> From: Andrea Tarchi >> To: Barry Clark >> cc: bclark@nrao.edu, , , >> , , , >> , , , >> , , >> >> Subject: Re: BT 75 = 3C 403 >> >> Dear Barry Clark, dear all, >> >> after the first slot of the BT 75 Global VLBI project on the water maser >> in 3C403 has been performed on November 25/26, we have taken a single dish >> spectrum of the maser with the Effelsberg telescope. Unfortunately, the >> maser is presently below the 5 mJy level (see the plot attached). >> >> Hence, the second slot of BT 75 scheduled for December 28 may, in >> our opinion, not reach the proposed goal of imaging the maser >> emission because of its intrinsic faintness. >> >> Thus we would like to know whether it is possible to postpone the second >> slot of observations until the maser will be once again strong enough to >> be detected and imaged with VLBI. The rapid variability of this luminous >> but distant maser is confirmed by past multi-epoch single dish >> observations. >> Having a single-dish monitoring project scheduled during the next year, we >> are confident that we will be able to tell when the maser is flaring-up >> again. >> >> We are aware of the scheduling problems that this decision may cause you >> and we apologize for it. >> >> Thanks in advance for any help or suggestion. Regards, >> >> Andrea >> >> >> On Thu, 1 Dec 2005, Barry Clark wrote: >> > >>>> > > I propose to schedule your second segment on December 28, 1400-2400 UT, >>>> > > with GB and Y27 (1330-2330 VLALST), at 256 Mbits/sec. >>>> > > >> >>> > >>> > This will be segment D of the proposal. >>> > >>> > I am herewith asking George Moellenbrok to continue serving as local >>> > technical contact person for this proposal. >>> > >>> > We would like to have an observe file by December 12. >>> > > >> >> -- >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> >> Istituto di Radioastronomia | Dr. Andrea | Osservatorio Astronomico >> Area della Ricerca - INAF | TARCHI | di Cagliari - INAF >> Via P. Gobetti 101 | | Poggio dei Pini, Strada 54 >> 40129 Bologna, Italy | 0 0 | 09012 Capoterra (CA), Italy >> Phone: +39 051 6399351 | * | Phone: +39 070 71180235 >> Fax: +39 051 6399431 | |_____| | Fax: +39 070 71180222 >> >> E-mail: a.tarchi@ira.inaf.it >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~