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=0A=0A-- Eredeti =C3=BCzenet --=0AFelad=C3=B3: aavso@aavso.orgC=C3=ADmzett:=
hadhazics@primposta.huElk=C3=BCldve: 2011. m=C3=A1jus 27. 18:14T=C3=A1rgy =
: AAVSO Alert Notice 441: Request for observations in support of ground-bas=
ed spectroscopy=0A=0AAAVSO Alert Notice 441=0A =0A Request for observations=
in support of ground-based spectroscopy=0A May 27, 2011=0A =0A Dr. Steve H=
owell (NASA) and Dr. Travis Rector (University of Alaska =0A Anchorage) hav=
e requested AAVSO observations of several bright giant =0A variable stars o=
f diverse classes.  This request is for immediate =0A support of spectrosco=
pic observations to be made at Kitt Peak National =0A Observatory between 2=
011 May 30 and 2011 June 01 (JD 2455712 - 714). =0A However, observers are =
encouraged to continue long-term monitoring of =0A these objects.=0A =0A Us=
ing the spectroscopy, as well as parallax measurements from Hipparcos =0A a=
nd contemporary photometry from the AAVSO, the distance, luminosity, =0A te=
mperature and radius of these stars are determined.  The goal of the =0A pr=
oject is to determine if the surface temperatures and radii of these =0A st=
ars change in a recognizable pattern over long timescales.=0A =0A Spectrosc=
opic observations will be made with the Kitt Peak Coude =0A Spectrograph fr=
om May 30th to June 1st.  Visual and photometric BVRI =0A observations of t=
hese stars around this time are requested.=0A =0A Below is the list of obje=
cts being monitored. The list is divided into =0A two groups by priority.=
=0A =0A Priority Targets=0A =0A NAME RA(J2000) DEC(J2000) CURRENT MAG SEQ?=
=0A Z UMa 11:56:30.22 +57:52:17.6 m(vis) ~ 7.3=0A R CrB 15:48:34.4 +28:09:2=
4.2 m(vis) ~ 13.1=0A SX Her 16:07:27.24 +24:54:29.9 m(vis) ~ 8.4=0A TT Oph =
16:49:35.88 +03:37:54 m(vis) ~ 10.0=0A TX Oph 17:04:00.09 +04:59:00.7 m(vis=
) ~ 10.5(?)=0A AC Her 18:30:16.24 +21:52:00.5 m(vis) ~ 8.3=0A R Sct 18:47:2=
8.94 -05:42:18.5 m(vis) ~ 5.3=0A =0A Other Targets:=0A =0A NAME RA(J2000) D=
EC(J2000) CURRENT MAG SEQ?=0A R Vir 12:38:29.94 +06:59:18.9 m(vis) ~ 11.1=
=0A Y CVn 12:45:07.82 +45:26:24.8 m(vis) ~ 5.4=0A G Her 16:28:38.54 +41:52:=
54 m(vis) ~ 5.1=0A UU Her 16:35:57.28 +37:58:02 m(vis) ~ 9.0=0A UZ Oph 17:2=
1:59.26 +06:54:42.1 m(vis) ~ 11.3=0A V453 Oph 17:26:49.13 -02:23:36.3 m(vis=
) =3D ? ***=0A XX Oph 17:43:56.5 -06:16:08.7 m(vis) ~ 8.9=0A TZ Oph 16:29:0=
7.71 -20:14:03.9 m(vis) =3D ? ***=0A V564 Oph 17:52:01.25 +07:56:29.1 m(vis=
) ~ 10.3=0A T Lyr 18:32:20.08 +36:59:55.6 m(vis) ~ 8.7=0A AD Aql 18:59:08.6=
9 -08:10:14 m(vis) =3D ?=0A AR Sgr 18:59:42.14 -23:42:26.6 m(vis) =3D ?=0A =
V5569 Sgr 18:50:03.56 -26:24:15.4 m(vis) =3D ? ***=0A EP Lyr 19:18:19.55 +2=
7:51:03 m(vis) ~ 10.6=0A EU Del 20:37:54.71 +18:16:06.3 m(vis) ~ 6.0=0A =0A=
Starred (***) objects do not currently have good AAVSO sequences -- they =
=0A either lack sequences entirely or have poorly placed stars -- but finde=
r =0A charts may still be plotted with our Variable Star Plotter =0A (http:=
//www.aavso.org/vsp).  Those without asterisks do have good =0A current seq=
uences available through VSP.  Requests for sequences will be =0A made to t=
he AAVSO Sequence Team, but these may not be available until =0A after the =
KPNO observing run is complete.  Until then, do your best with =0A what is =
available. CCD observers can take observations and store their =0A images f=
or later reduction when better sequences are available.=0A =0A This AAVSO A=
lert Notice was prepared by Travis Rector with assistance =0A from Aaron Pr=
ice and Matthew Templeton.=0A =0A -----------------------------------------=
--=0A SUBMIT OBSERVATIONS TO THE AAVSO=0A =0A Information on submitting obs=
ervations to the AAVSO may be found at:=0A =0A http://www.aavso.org/observi=
ng/submit/=0A =0A ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION=0A =0A =
An Alert Notice archive is available at the following URL:=0A http://www.aa=
vso.org/publications/alerts/=0A =0A Subscribing and Unsubscribing may be do=
ne at the following URL:=0A http://www.aavso.org/publications/email/=0A

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