[vsnet-alert 1066] ALEXIS Transient - EUVE Source Found - Need Optical Spectroscopy Help

["Jeffrey J. Bloch" <jbloch@lanl.gov>]

Dear All,

On July 14, 1997, ALEXIS detected a transient in Telescope 3B (186
Angstroms) which appeared to last approximately 48 hours from
approximately 12UT July 12 to 12UT July 14.

On July 14, an EUVE Target of Opportunity Observation was executed and a
weak EUV source was detected in the ALEXIS error box that *could*
be the fading or quiescent counterpart to the event. The EUV source was
approximately 1 arcminute away from a 6.5 mag G6III star which may or may
not be the EUVE source. 

The fitted centroid of the source in the EUVE data is located at:

RA =  20 41  0.4  Dec = -42 23 25.3 (J2000)
                or
RA = 310.25176 degrees Dec = -42.390355 degrees


From SIMBAD the Info on the nearby bright star is:

HD 196748 -- Star in double system

Coordinates (2000.0) : 20 40 55.35 -42 23 49.2
Galactic coordinates : 358.76 -37.56
Pr. motion [error] (2000.0) : -0.004 [ 10] +0.010 [ 8]
B magn:7.3 V magn:6.5 Pecul: 
Spectral type : G6III

And it's double companion:

CD-42 15029B -- Star in double system

Coordinates (2000.0) : 20 40 53.8 -42 23 38
Galactic coordinates : 358.76 -37.56
B magn:11.6 V magn:9.7 Pecul: 
Spectral type : G5


We need someone with a view of this southern object(s) to take a
high resolution Calcium H and K spectra of this star system
to check for coronal activity.

				Thanks in advance for any assistance,
							Jeff Bloch


--------------------------------------------------------------------------
Jeffrey Bloch					Office:    (505) 665-2568
Astrophysics and Radiation Measurements Group	ALEXIS SOC:(505) 665-5975
Los Alamos National Laboratory			FAX:	   (505) 665-4414
Group NIS-2, Mail Stop D436		e-mail:    jbloch@lanl.gov
Los Alamos, NM 87545		 Digital Pager:	   (505)665-9800 #104-8074
--------------------------------------------------------------------------

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp