GISMO:
Many years of observations at the
IRAM 30m telescope, and lessons
learned for the design of GISMO-2
Johannes Staguhn Johns Hopkins University & NASA's GSFC
LTD-16, Grenoble, July 23, 2015
Rick Arendt1, Dominic Benford1, Eli Dwek1, Dale Fixsen1, Gene Hilton2, Kent Irwin2,Christine Jhabvala1, Alexander Karim5,
Attila Kovacs3, Samuel Leclercq4, Stephen Maher1, Tim Miller1, S. Harvey Moseley1, Eva Schinnerer6, Elmer Sharp1,
Ting Su7, Fabian Walter6, Edward Wollack1
1NASA's GSFC, 2NIST/Boulder,
3University of Minnesota/Caltech, 4IRAM, Grenoble
5Cardiff & University of U . of Bonn6MPIA Heidelberg
7JHU
GISMO Team
LTD-16, Grenoble, July 23, 2015
The Goddard-IRAM Superconducting 2-Millimeter Observer (GISMO)
Backshort
under Grid
(BUG)
TES detector
array
GISMO Deep Field
(GDF)
Staguhn et al. 2014, ApJ,
790,77
PI J. Staguhn
LTD-16, Grenoble, July 23, 2015
Galactic Center: red: GISMO 2mm, green: SCUBA 850mm, blue: SCUBA 450 mm
A few Scientific Highlights
SFB Colloquium, Köln, July 13, 2015
Observations of Dust Emission in nearbyGalaxies: NGC4631
PI: Marcus Albrecht
SFB Colloquium, Köln, July 13, 2015
Galactic Center @ 2mm
t_int (including pointing measurments): 6.5 hours
NEFD ~ 9 mJy rt(s)
noise in map: 2 - 2.5 mJy
dynamic range >1000 LTD-16, Grenoble, July 23, 2015
red: VLA 20cm, green: GISMO 2mm, blue: Laboca 850 mm
(F.Yusef-Zadeh) (F. Schuller)
Galactic Center Composite
Sgr B Sgr A Sgr C
LTD-16, Grenoble, July 23, 2015
red: VLA 20cm, green: GISMO 2mm, blue: Laboca 850 mm
(F.Yusef-Zadeh) (F. Schuller)
Galactic Center Composite
LTD-16, Grenoble, July 23, 2015
red: VLA 20cm, green: GISMO 2mm, blue: Laboca 850 mm
(F.Yusef-Zadeh) (F. Schuller)
Galactic Center Composite
LTD-16, Grenoble, July 23, 2015
GISMO detection of z = 6.3 sub-mm galaxy HFLS3
Riechers et al., 2013, Nature, 496, 329LTD-16, Grenoble, July 23, 2015
GISMO Deep Field: Going Even Deeper
•tint : 69 hrs
•Signal map:
~ 110 mJy rms
Jackknifed map:
~ 75 mJy rms (!)
Confusion noise:
~ 80 mJy rms
7’ 7’GDF GDF - jackknifed
LTD-16, Grenoble, July 23, 2015
GISMO Deep Field
(GDF) with 39 hours:
Staguhn et al. 2014, ApJ,
790,77
COSMOS
tint ~ 100 hrs
210 mJy rms
Karim+ in prep. LTD-16, Grenoble, July 23, 2015
First SZ Results from GISMO: Planck G147.3-16.6 (z = 0.645)
Upper Left: GISMO deconvolved map
(16.9 ksec; 4.7 hours).
Upper Right: XMM observations (58
ksec total), with radio halo from van
Weeren et al. 2014 overlaid.
Lower Left: Noise in the GISMO map;
central RMS < 0.4 mJy/bm.
Lower Right: S/N map with XMM
contours overlaid.
Mroczkowski et al. 2015, ApJ, 808L, 6
Also see the press release:
http://www.iram-
institute.org/EN/news/2015/105.html
LTD-16, Grenoble, July 23, 2015
LTD-16, Grenoble, July 23, 2015
Goddard-Iram Superconducting Millimeter Observer (GISMO)
LTD-16, Grenoble, July 23, 2015
Goddard-Iram Superconducting Millimeter Observer (GISMO)
• Telescope: IRAM 30m
• 128 pixels, 0.9 l/D, 4’x 2’ FOV
•Angular resolution ~ 17”
• Blind flux calibration ~ 7%
•NEFD ~ 15-20 mJy rt(s)LTD-16, Grenoble, July 23, 2015
Improvement # 1: Straylight Suppression
LTD-16, Grenoble, July 23, 2015