H alpha measurements using DEFPOS/RTT150 Telescope: Instrumentation and observations

WOS: 000264845000013To investigate the physical properties of HII regions and some PNe about 4' in size, a DEFPOS Fabry-Perot spectrometer has been redesigned and set up at the coude exit of the 150cm RT7150 telescope (f/48) at TUBITAK National Observatory (Antalya/Bakirhtepe, Turkey). The spectrometer has a 4' circular field of view and a velocity resolution of 27.27 km s(-1) (a spectral resolving power of 11 000) over a 200 km s(-1) spectral window near H alpha. This work presents the details of the newly redesigned instrument for coude observations, the data reduction techniques and finally presents some physical results of our new H alpha observations selected from the Reynolds et al. (2005) and Fich et al. (1990) papers. The DEFPOS system has been fully tested and the first observations of HII regions and PNe in the Galaxy are used to illustrate the power of the instrument. We feel that our first Fabry-Perot observations can provide a powerful tool for the study of objects with small angular size. In the future, we are planning to prepare a catalog including some physical properties such as radial velocity, line width, and intensity of some PNe and HII regions close to the 4' field of view.University of Wisconsin; VTSS map; SIMBAD Astronomical Database; Southern H-Alpha Sky Survey Atlas (SHASSA); National Science FoundationNational Science Foundation (NSF); TUBITAK (the Scientific and Technical Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [104T252]The authors would like to thank the TUG staff for help during the observations. The authors also wish to thank R. J. Reynolds, and L. M. Haffner, from the University of Wisconsin for letting us use their data and for having greatly contributed to the start of this study. We acknowledge the use of the VTSS map, a wide-field image survey of the Galaxy's warm ionized interstellar medium, the use of the SIMBAD Astronomical Database, operated at CDS, Strasbourg, France and the use of the Southern H-Alpha Sky Survey Atlas (SHASSA), which is supported by the National Science Foundation. This work is supported by TUBITAK (the Scientific and Technical Research Council of Turkey) with grant number 104T252