3/26/05 SMARTS 1.5m Service Observing Program 050326 --- EPHEMERIS INFORMATION --- For the night of: Sat, 2005 Mar 26 ---> Sun, 2005 Mar 27 Local midnight = 2005 Mar 27, 4 hr UT, or JD 2453456.667 Local Mean Sidereal time at midnight = 11 35 30.0 Sunset ( 2215 m horizon): 18 54 CST; Sunrise: 6 44 CST Evening twilight: 20 06 CST; LMST at evening twilight: 7 41 Morning twilight: 5 31 CST; LMST at morning twilight: 17 08 Moonrise: 19 14 CST Moon at civil midnight: illuminated fraction 0.981 1.3 days after full moon, RA and dec: 13 23 10, -8 10.0 The sun is down for 11.8 hr; 9.4 hr from eve->morn 18 deg twilight. .......................................................................... Civil date Setup Program(s) Mar 25 16/I AMNH 05a-01 *** not a standard setup .............................................................................. Name Slit Filter Coll Grating Tilt & Comp,exp Ystart Ysize Yspec Blaze w.l. cov. (sec) Res (A) 16/I 110.5 clear ? 26 ? He-Ar 30 ? ? ? 5550 4200-6150 4.8 .............................................................................. In afternoon or during dinner: - Install 26/I grating setup - check focus if necessary - obtain at least 25 Zero frames - obtain at least 10, preferably 25, flat-field frames (projector or dome) Get well-exposed TWILIGHT SPECTRA at zenith at beginning of night. Aim for three spectra, each with between 5,000 and 30,000 counts per pixel. Target RA (J2000) Dec CWR11 11:07:53.8 -61:27:41.8 CWR12 11:06:18.1 -61:14:24.0 CWR13 11:04:34.5 -61:37:06.9 CWR14 11:04:38.8 -61:30:41.8 CWR15 11:06:12.5 -61:25:27.5 CWR16 11:05:48.2 -61:20:36.1 CWR17 11:05:46.7 -61:13:47.1 CWR18 11:05:28.0 -61:03:13.8 CWR21 17:19:00.0 -38:47:28.2 CWR22 17:19:18.6 -38:44:55.0 CWR23 17:19:13.8 -38:40:12.0 CWR24 17:19:52.9 -38:38:13.6 CWR25 17:21:06.8 -38:42:22.5 CWR26 17:19:49.9 -38:50:58.1 CWR27 17:20:08.0 -38:57:16.8 CWR28 17:20:04.5 -38:57:28.1 CWR29 17:20:01.2 -38:57:51.3 CWR30 17:20:03.2 -38:58:06.2 CWR31 17:20:02.2 -38:58:03.1 Instructions: The objects we will ask you to observe are candidate Wolf-Rayet stars (very massive stars, powerful winds, pre-supernovae). (If one of them blows up as a supernova while you are observing it, run like hell.) You will see strong emission lines in the spectra if our IDs are correct! This is an important test for us that our Wolf-Rayet IR imaging survey is proceeding well. Some of the stars are as bright as 12th magnitude visual, others as faint as 17th magnitude. We have plenty of candidates, so we prefer that you focus on the stars that are easy to find and see with the 1.5 meter. If it takes more than five minutes to find a star, it's too faint or crowded, forget it! ----------- Finding Charts: http://www.astro.sunysb.edu/fwalter/SMARTS/FC/cwr*.jpg ----------- Address questions to: dzurek@amnh.org mshara@amnh.org