WAVELENGTH CALIBRATION OF THE HAMILTON ECHELLE SPECTROGRAPH

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/146/4/97· OSTI ID:22275444

Pakhomov, Yu. V. ^[1]

---

1. Institute of Astronomy, Russian Academy of Sciences, Moscow (Russian Federation)

We present the wavelength calibration of the Hamilton Echelle Spectrograph at Lick Observatory. The main problem with the calibration of this spectrograph arises from the fact that thorium lines are absent in the spectrum of the presumed ThAr hollow-cathode lamp now under operation; numerous unknown strong lines, which have been identified as titanium lines, are present in the spectrum. We estimate the temperature of the lamp's gas which permits us to calculate the intensities of the lines and to select a large number of relevant Ti I and Ti II lines. The resulting titanium line list for the Lick hollow-cathode lamp is presented. The wavelength calibration using this line list was made with an accuracy of about 0.006 Å.

• OSTI ID: 22275444
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 146, Issue 4; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
42 ENGINEERING
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCURACY
ASTRONOMY
ASTROPHYSICS
CALIBRATION
HOLLOW CATHODES
LIGHT BULBS
OPERATION
OPTICAL SPECTROMETERS
THORIUM
TITANIUM
TITANIUM IONS
WAVELENGTHS