SUMMARY OF PROPOSAL 41026
MS YOHKO TSUBOI
KYOTO UNIV.
KYOTO JAPAN 606-01
KYOTO
KITASHIRAKAWA

  E-mail: TSUBOI@CR.SCPHYS.KYOTO-U.AC.JP	Tel: (81)-75-753-3843	Fax: (81)-75-701-5377
  Medium: 2.5GB8MM

Subject: STARS                                                       
  Title: SPIN PERIOD OF A PROTOSTAR                                                      


Abstract:
 With the PV phase observation of the Rho-Oph dark cloud, we found hard X-ray
 emission from embedded infrared sources, which may be protostars ( pre-stage of T-
 Tauri star). One of the hard source WL6 shows sinusoidal variation indicating rapid
 rotation of the protostar. Our proposal is to establish this sinusoidal variation
 and determine the spin period by X-rays. Higher spatial resolution observation
 (observe at on axis position) to resolve source confusion and to search for X-rays
 from a younger object in the Rho-Oph cloud is also proposed.

 Co-Is:
   1  K. KATSUJI          	KYOTO UNIV.                   JAPAN     
      (No Co-I contact data)
   2  S. UENO             	KYOTO UNIV.                   JAPAN     
   3  N. KOBAYASHI        	NAO                           JAPAN     
   4  M. HAYASHI          	NAO                           JAPAN     
   5  S. YAMAUCHI         	IWATE UNIV.                   JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
RHO OPH CORE           3  246.8392  -24.4967    40   N   Y   P  0.10000   1 

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