The MagE spectrograph

Marshall, J. Le; Burles, Scott; Thompson, I. B.; Shectman, Stephen; Bigelow, Bruce C.; Burley, Greg; Birk, Christoph; Estrada, Jorge; Jones, Patricio; Smith, Matthew J.; Kowal, Vince; Castillo, Jerson; Storts, Robert; Ortiz, Greg

doi:10.1117/12.789972

Cited by 138 publications

(45 citation statements)

References 2 publications

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“…) who present larger spectral sets. As with the two previous spectra (Massey et al 2014), this new spectrum was obtained at Las Campanas Observatory with the 6.5-m Magellan II (Clay) telescope using the MagE spectrograph (Marshall et al 2008) and a 1 slit which provided a resolution ranging from 0.7 to 1.7 Å going from the blue to the red end of the optical spectrum. The exposure time was 3 × 600 s. The data were processed with a combination of the IRAF mtools package, originally developed by Jack Baldwin for the reduction of MIKE data, and standard IRAF échelle tasks as described by Massey et al (2012).…”

Section: Datamentioning

confidence: 99%

Photometric identification of the periods of the first candidate extragalactic magnetic massive stars

Nazé

Walborn

Morrell

et al. 2015

A&A

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Galactic stars belonging to the Of?p category are all strongly magnetic objects exhibiting rotationally modulated spectral and photometric changes on timescales of weeks to years. Five candidate Of?p stars in the Magellanic Clouds have been discovered, notably in the context of ongoing surveys of their massive star populations. Here we describe an investigation of their photometric behaviour, revealing significant variability in all studied objects on timescales of one week to more than four years, including clearly periodic variations for three of them. Their spectral characteristics along with these photometric changes provide further support for the hypothesis that these are strongly magnetized O stars, analogous to the Of?p stars in the Galaxy.

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Section: Datamentioning

confidence: 99%

Photometric identification of the periods of the first candidate extragalactic magnetic massive stars

Nazé

Walborn

Morrell

et al. 2015

A&A

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“…For each sample target, we obtained additional far-optical spectra using the Magellan Echellette spectrometer (MagE; Marshall et al 2008), for the purpose of augmenting S/N in the region blueward of 9000 Å. These spectra had typical integration times of ∼1 hr and R = 5600, a close match to FIRE.…”

Section: Observations and Data Reductionsmentioning

confidence: 99%

CONSTRAINTS ON THE UNIVERSAL C IV MASS DENSITY ATz∼ 6 FROM EARLY INFRARED SPECTRA OBTAINED WITH THE MAGELLAN FIRE SPECTROGRAPH

Simcoe

Cooksey

Matejek

et al. 2011

ApJ

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We present a new determination of the intergalactic C iv mass density at 4.3 < z < 6.3. Our constraints are derived from high signal-to-noise spectra of seven quasars at z > 5.8 obtained with the newly commissioned Folded-Port Infrared Echellette (FIRE) spectrograph on the Magellan Baade telescope, coupled with six observations of northern objects taken from the literature. We confirm the presence of a downturn in the C iv abundance at z = 5.66 by a factor of 4.1 relative to its value at z = 4.96, as measured in the same sight lines. In the FIRE sample, a strong system previously reported in the literature as C iv at z = 5.82 is re-identified as Mg ii at z = 2.78, leading to a substantial downward revision in Ω C iv for these prior studies. Additionally, we confirm the presence of at least two systems with low-ionization C ii, Si ii, and O i absorption but relatively weak signal from C iv. The latter systems may be of interest if the downward trend in Ω C iv at high redshift is driven in part by ionization effects.

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“…Nova Muscae was observed with the Magellan Echelette (MagE; Marshall et al 2008) spectrograph on the Magellan Clay telescope in 2009. Data were obtained over the nights of April 25-26, 33 spectra from the first night and 39 from the second night.…”

Section: Observationsmentioning

confidence: 99%

Tomography of X-ray Nova Muscae 1991: evidence for ongoing mass transfer and stream–disc overflow★

Peris

Vrtilek

Steiner

et al. 2015

Monthly Notices of the Royal Astronomical Society

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We present a spectroscopic analysis of the black hole binary Nova Muscae 1991 in quiescence using data obtained in 2009 with MagE on the Magellan Clay telescope and in 2010 with IMACS on the Magellan Baade telescope at the Las Campanas Observatory. Emission from the disc is observed in H α, H β and Ca II (λ8662). A prominent hotspot is observed in the Doppler maps of all three emission lines. The existence of this spot establishes ongoing mass transfer from the donor star in 2009-2010 and, given its absence in the 1993-1995 observations, demonstrates the presence of a variable hotspot in the system. We find the radial distance to the hotspot from the black hole to be consistent with the circularization radius. Our tomograms are suggestive of stream-disc overflow in the system. We also detect possible Ca II (λ8662) absorption from the donor star.

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The MagE spectrograph

Cited by 138 publications

References 2 publications

Photometric identification of the periods of the first candidate extragalactic magnetic massive stars

Photometric identification of the periods of the first candidate extragalactic magnetic massive stars

CONSTRAINTS ON THE UNIVERSAL C IV MASS DENSITY ATz∼ 6 FROM EARLY INFRARED SPECTRA OBTAINED WITH THE MAGELLAN FIRE SPECTROGRAPH

Tomography of X-ray Nova Muscae 1991: evidence for ongoing mass transfer and stream–disc overflow★

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