Further Spectroscopic Observations of the Optical Object Identified with X-Ray Source Cygnus X-2

1969 ◽  
Vol 155 ◽  
pp. L159 ◽  
Author(s):  
Robert P. Kraft ◽  
Joseph S. Miller
Keyword(s):  
X Ray ◽  
Spectroscopic Observations

First X-ray Spectroscopic Observations of Atmospheric Titanium Species: Size Dependence and the Emission Source

2021 ◽  
Author(s):  
Kohei Sakata ◽  
Yoshio Takahashi ◽  
Shotaro Takano ◽  
Atsushi Matsuki ◽  
Aya Sakaguchi ◽  
...  
Keyword(s):  
Size Dependence ◽  
Emission Source ◽  
X Ray ◽  
Spectroscopic Observations

scholarly journals H2 Emission from External Galaxies

1992 ◽  
Vol 150 ◽  
pp. 103-107
Author(s):  
Kimiaki Kawara
Keyword(s):  
Uv Radiation ◽  
Supernova Remnants ◽  
Emission Lines ◽  
Hot Stars ◽  
Shock Excitation ◽  
X Ray ◽  
Spectroscopic Observations ◽  
Near Ir ◽  
Bare Nucleus ◽  
External Galaxies

2 μm spectroscopic observations by many authors have revealed significant rotation-vibrational H2 emission is widespread from starburst to bare nucleus galaxies. Near-IR H2 emission lines can arise from various excitation sources: UV radiation by hot stars, shock excitation by supernova remnants or AGN driven winds, and UV/X-ray radiation by an AGN. In this review recent data will be compared with such H2 excitation models.

scholarly journals Optical Observations of X-Ray Sources in the LMC

1980 ◽  
Vol 88 ◽  
pp. 357-358
Author(s):  
M. Pakull
Keyword(s):  
Optical Observations ◽  
X Ray ◽  
Spectroscopic Observations

Photoelectric and spectroscopic observations of optical counterparts of X-ray sources in the LMC are described.

scholarly journals Photometric and spectroscopic observations of an optical candidate for the X-ray source H 0544 - 665

1983 ◽  
Vol 203 (2) ◽  
pp. 279-284 ◽  
Author(s):  
M. van der Klis ◽  
J. van Paradijs ◽  
P. A. Charles ◽  
J. R. Thorstensen ◽  
I. Tuohy ◽  
...  
Keyword(s):  
X Ray ◽  
Spectroscopic Observations ◽  
Photometric And Spectroscopic Observations

scholarly journals Spectroscopic observations of the X-ray nova A0620 - 00

1977 ◽  
Vol 180 (4) ◽  
pp. 657-673 ◽  
Author(s):  
J. A. J. Whelan ◽  
M. J. Ward ◽  
D. A. Allen ◽  
I. J. Danziger ◽  
R. A. E. Fosbury ◽  
...  
Keyword(s):  
X Ray ◽  
Spectroscopic Observations

scholarly journals X-Ray Spectra from Highly Ionized Iron and Nickel

1972 ◽  
Vol 14 ◽  
pp. 589-591 ◽  
Author(s):  
J. L. Schwob ◽  
B. S. Fraenkel
Keyword(s):  
Source Position ◽  
Peak Current ◽  
Pinch Effect ◽  
X Ray ◽  
Spectroscopic Observations ◽  
Vacuum Spark

X-ray radiation is obtained from a point plasma produced by pinch effect Cohen et al. (1968) in a vacuum spark similar to that used by Lie and Elton (1971) with a 220 kA peak current. The extremely dense and hot minute plasma appears at a distance of 0.5 to 1 mm from the anode tip and has maximum dimensions of a few microns.The spectroscopic observations are performed by means of a focusing Cauchois spectrometer so as to avoid effects of fluctuations in the source position.

scholarly journals Call H and K Emission in the Secondary Component of U Cephei

1988 ◽  
Vol 108 ◽  
pp. 219-220
Author(s):  
Akira Okazaki ◽  
Yasuhisa Nakamura ◽  
Jun-Ichi Katahira
Keyword(s):  
Emission Lines ◽  
Secondary Component ◽  
Eclipsing Binary ◽  
Image Tube ◽  
X Ray ◽  
Spectroscopic Observations ◽  
The Third ◽  
Total Eclipse ◽  
Hot Corona ◽  
Made In

U Cephei (V = 6.8–9.0, P = 2.493 d) is an eclipsing binary consisting of a B7V primary and a G8III-IV secondary component. This binary is one of the semidetached Algol systems showing soft X-ray emission which is probably associated with a hot corona surrounding the secondary component (White and Marshall 1983).We made spectroscopic observations of U Cep with the coudé image-tube spectrograph of the 1.9-m telescope at Okayama Astrophysical Observatory on October 14, 1986. We obtained four spectrograms with a dispersion of 16 Å mm-1 covering λ λ3700—4300 Å during the primary eclipse. The first two exposures were made in a total eclipse, while the last two were slightly after the third contact. The CaII H and K emission lines appear clearly in all the spectrograms. Figure 1 represents an intensity tracing of one of these spectrograms.

scholarly journals LOW X-RAY LUMINOSITY GALAXY CLUSTERS: MAIN GOALS, SAMPLE SELECTION, PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS

2016 ◽  
Vol 151 (6) ◽  
pp. 151
Author(s):  
José Luis Nilo Castellón ◽  
M. Victoria Alonso ◽  
Diego García Lambas ◽  
Carlos Valotto ◽  
Ana Laura O’ Mill ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
Sample Selection ◽  
X Ray ◽  
Spectroscopic Observations ◽  
Photometric And Spectroscopic Observations ◽  
Low X
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