Chun, Sang-Hyun, Kim, Jae-Woo, Sohn, Sangmo T., Park, Jang-Hyun, Han, Wonyong, Kim, Ho-Il, ...
Wide-field deep gri images obtained with the Megacam of the Canada-France-Hawaii Telescope (CFHT) are used to investigate the spatial configuration of stars around five metal-poor globular cluster...
Long-term Photometric Behavior of the Eclipsing Binary GW Cephei (2009)
Lee, Jae Woo, Youn, Jae-Hyuck, Han, Wonyong, Lee, Chung-Uk, Kim, Seung-Lee, Kim, Ho-Il, ...
New CCD photometry during 4 successive years from 2005 is presented for the eclipsing binary GW Cep, together with reasonable explanations for the light and period variations. All historical light...
Swinyard, Bruce, Nakagawa, Takao, Merken, Patrick, Royer, Pierre, Souverijns, Tim, Vandenbussche, Bart, ...
The Space Infrared telescope for Cosmology and Astrophysics (SPICA) is planned to be the next space astronomy mission observing in the infrared. The mission is planned to be launched in 2017 and will...
The SPICA Consortium, Swinyard, Bruce, Nakagawa, Takao, Merken, Patrick, Royer, Pierre, Souverijns, Tim, ...
Design Concept For Single Chip Mosaic CCD Controller (2007)
Wonyong Han, Ho Jin, David D. Walker, Martin Clayton
The CCDs are widely used in astronomical observations either in direct imaging use or spectroscopic mode. However, the areas of available sensors are too small for large imaging format. One...
Far-Ultraviolet Cooling Features of the Antlia Supernova Remnant (2007)
Shinn, Jong-Ho, Min, Kyoung Wook, Sankrit, Ravi, Ryu, Kwang-Sun, Kim, Il-Joong, Han, Wonyong, ...
We present far-ultraviolet observations of the Antlia supernova remnant obtained with Far-ultraviolet IMaging Spectrograph (FIMS, also called SPEAR). The strongest lines observed are C IV 1548,1551...
Diffuse Far-ultraviolet Observation of the Lupus Loop Region (2006)
Shinn, Jong-Ho, Min, Kyoung Wook, Lee, Chi-Na, Edelstein, Jerry, Korpela, Eric J., Welsh, Barry Y., ...
Diffuse far-ultraviolet (FUV) emissions from the Lupus Loop region (SNR 330.0+15.0) have been observed with Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR), also known as...
The SPEAR Instrument and On-Orbit Performance (2006)
Edelstein, Jerry, Korpela, Eric, Adolfo, Joe, Bowen, Mark, Feuerstein, Michael, Hull, Jeffrey, ...
The SPEAR (or 'FIMS') instrumentation has been used to conduct the first large-scale spectral mapping of diffuse cosmic far ultraviolet (FUV, 900-1750 AA) emission, including important diagnostics of...
SPEAR Far Ultraviolet Spectral Images of the Cygnus Loop (2006)
Seon, Kwang-Il, Han, Wonyong, Nam, Uk-Won, Park, Jang-Hyun, Edelstein, Jerry, Korpela, Eric J., ...
We present far-ultraviolet (FUV) spectral images, measured at C IV 1550, He II 1640, Si IV+O IV] 1400, and O III] 1664, of the entire Cygnus Loop, observed with the Spectroscopy of Plasma Evolution...
Far-ultraviolet Observations of the North Ecliptic Pole with SPEAR (2006)
Korpela, Eric J., Edelstein, Jerry, Kregenow, Julia, Nishikida, Kaori, Min, Kyoung-Wook, Lee, Dae-Hee, ...
We present SPEAR/FIMS far-ultraviolet observations near the North Ecliptic Pole. This area, at b~30 degrees and with intermediate HI column, seems to be a fairly typical line of sight that is...
Discovery of Remote Star Clusters in the Halo of the Irregular Galaxy NGC 6822 (2005)
Hwang, Narae, Lee, Myung Gyoon, Lee, Jong Chul, Park, Won-Kee, Park, Hong Soo, Park, Jang-Hyun, ...
We report the discovery of three new star clusters in the halo of the Local Group dwarf irregular galaxy NGC 6822. These clusters were found in the deep images taken with the MegaPrime at the CFHT,...
Deep Wide Field BVI CCD Photometry of the Sextans Dwarf Spheroidal Galaxy (2003)
Lee, Myung Goon, Park, Hong Soo, Park, Jang-Hyun, Sohn, Young-Jong, Oh, Seung Joon, Yuk, In-Soo, ...
We present deep wide field $VI$ CCD photometry of the Sextans dwarf spheroidal galaxy (dSph) in the Local Group, covering a field of 42' x 28' located at the center of the galaxy. Color-magnitude...
On the Feasibility of Detecting Satellites of Extrasolar Planets via Microlensing (2002)
Although many methods of detecting extra-solar planets have been proposed and successful implementation of some of these methods enabled a rapidly increasing number of exoplanet detections, little...
Astrometric Detection of Double Gravitational Microlensing Events (2001)
Han, Cheongho, Park, Byeong-Gon, Han, Wonyong, Kang, Young Woon
If a gravitational microlensing event is caused by a widely separated binary lens and the source approaches both lens components, the source flux is successively magnified by the individual lenses:...
Light Curve Analysis of Cw Cephei (1996)
Jo Ryeong Yim, Chun-Hwey Kim, Wonyong Han
The UBV observations of the close binary system CW Cephei were made from August 1983 to December 1984 during 25 nights using the 61cm Boller and Chivens reflector at the Sobaeksan Astronomy...