AO mode
NGS or TTGS
V mag / separation
Seeing
(@ zenith)
Elevation [deg]
(seeing @ El)
NIRI imaging in K’
FWHM (Moffat fit)
NGS vs LGS comparison (on-axis)
NGS 8.75 / on-axis 0.39” 78 (0.40”) 91 mas
LGS 12.6 / on-axis 0.40” 57 (0.44”) 102 mas
Faint TTGS and Elevation dependance (on-axis)
LGS 17.1 / on-axis 0.42” 67 (0.44”) 130 mas
LGS 17.1 / on-axis 0.45” 40 (0.59”) 180 mas
Performance Comparison off-axis
LGS 16.4 / on-axis 0.48” 47 (0.58”) 125 mas
LGS 16.4 / 22” off-axis 0.51” 47 (0.62”) 136 mas
or extend over two to six semesters, or both.
Large programs are expected to promote
collaborations across the partnership’s com-
munities, have significant scientific impact,
and provide a homogeneous data set, poten-
tially for more general use.
The announcement of opportunity was re-
leased on December 15, 2018, and informa-
tion on proposal submission can be found
within the Large and Long Program webpag-
es. All interested teams are required to sub-
mit a Letter of Intent no later than February 4,
2019, with full proposals due on April 1, 2019.
In addition to the Gemini suite of instrumen-
tation, Principal Investigators from LLP par-
ticipating partners are invited to submit pro-
posals for Subaru Intensive Programs via the
Gemini-Subaru time exchange program.
New Data Reduction
Resources for 2019
The FLAMINGOS-2 data reduction cookbook
provides Python scripts that wrap tasks in
the Gemini IRAF package and serve as a
guide to the reduction and calibration of im-
aging and long-slit spectroscopy data. Visit
the FLAMINGOS-2 data reduction webpage
for more details. Comments, questions, or
notifications of errors are encouraged and
can be submitted via email or helpdesk re-
quest using the Gemini IRAF category.
January 2019 / 2018 Year in Review
A new, hands-on four-hour tutorial on re-
ducing Gemini Multi-Object Spectrograph
(GMOS) Integral Field Unit-1 data was pre-
sented live at the Science and Evolution of
Gemini Observatory 2018 meeting in July.
The participants were shown how to obtain
the data and calibrations and go from raw
data to a stacked cube, all the while address-
ing various possible data issues. An online
version of the step-by-step tutorial is now
available to everyone at this link. Software
installation instructions are included.
A document is now available describing data
reduction solutions to some of the more se-
rious issues that arose due to problems with
the GMOS instrument or detectors. The doc-
ument is based mostly on issues with the
GMOS-South Hamamatsu data and for now
only discusses imaging data. It will be ex-
panded to cover spectroscopy in the future.
Feedback is welcome (email here).
A new version of the DRAGRACES pipeline
fixes a previously problematic wavelength
calibration. Please use version 1.2, or later,
from now on. If you have ever used a pre-
vious DRAGRACES version, please have a
second look! Note that it is always recom-
mended to compare your GRACES extracted
spectra using DRAGRACES and OPERA (ex-
tracted spectra are distributed by the Gem-
ini Observatory Archive) before performing
a detailed analysis. (Disclaimer: DRAGRACES
GeminiFocus
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