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 * Progress of observations can be followed via the [[https://herapool.iram.es|pool data base]]. (CHECK: add link to new data base surface)  * Progress of observations can be followed via the [[https://pools.iram.es|pool data base]].
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==== Data reduction ====

To reduce GISMO data with crush, first log into your project account:

{{{
ssh -X project_number@mrt-lx3.iram.es
}}}

Raw data are stored in the directory ~/observationData/gismo. The scans are stored in a filing hierarchy, organised by source name, then an IRAM scan ID composed of a UT calendar date and a scan number. For example, the scan 113 taken on 2013-04-12 of M33 is stored as:

{{{
~/observationData/gismo/M33/2013-04-12.113/M33_2013-04-12.113_gismo.fits}}}

To reduce this scan with crush, type in your terminal:

{{{
crush gismo -default -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113 -outpath=~/crush_reduction -name=M33
}}}

In the case of faint sources (S/N<10) you can use the option "faint":

{{{
crush gismo -faint -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113 -outpath=~/crush_reduction -name=M33_faint
}}}

Other options to optimise the reduction are "bright" for strong sources (S/N>1000), "extended" for structures larger than the field of view, and "deep" for deep fields (faint point sources).

It is possible to add several scans:

{{{
crush gismo -faint -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113-116 120 -date=2013-04-13 1-6 -outpath=~/crush_reduction -name=M33_faint_allscans
}}}

and also to combine different fields of view:

{{{
crush gismo -faint -datapath=~/observationData/gismo -object=M33a -date=2013-04-12 113-116 120 -object=M33b -date=2013-04-14 21-23 -outpath=~/crush_reduction -name=M33ab_faint_allscans
}}}

For a detailed description of crush's options and capabilities, see the [[http://www.submm.caltech.edu/~sharc/crush/document.html|crush documentation]].

GISMO

This page is maintained by IH, CK, SL and the GISMO team

Contents

  1. GISMO
    1. Overview
    2. Call for proposals for the summer semester 2013
    3. Documentation
    4. Publications
    5. Support teams
    6. Observing Runs
      1. April 2013 - 3rd pool run
        1. Pool projects and observers
        2. Observing scripts
        3. Data reduction
      2. November 2012 - 2nd pool run
        1. Pool projects and observers
        2. Daily reports
      3. April 2012 - 1st pool run
        1. Daily reports
        2. Test plan
      4. Test runs 2007-2012
        1. 5th alignment run, March 2012
        2. 4th test run, April 2011
        3. 3rd test run, April 2010
        4. 2nd test run, October 2008
        5. 1st test run, November 2007

Overview

Pixels

Wavelength

Bandwidth

Sensitivity

HPBW

Field-of-View

Spacing

mm

[GHz]

[mJy sqrt(s)

GISMO

8x16

2

140-162

10

16.7"

1.8'x3.7'

13.75"

The Goddard-IRAM Superconducting 2mm Observer (GISMO) is a bolometer camera for the IRAM 30m telescope. It has been build by Goddard Space Flight Center, in Greenbelt, Maryland under the lead of Johannes Staguhn. GISMO consists of 8x16 pixels with super conducting transition edge sensors (TES). The TES are read out by time domain SQUID multiplexers built at the National Institute for Standards (NIST), in Boulder, Colorado. The nominal bandwidth is 140-162 GHz (FWHM), pixels are spaced by 13.75", the telescope HPBW is 16.7". The sensitivity has improved relative to the April 2011 run to about 10 mJy sqrt(sec) (cf. report below). The field-of-view is 1.8'x3.7' . Two standard observing modes are offered, Lissajous curves and on-the-fly scans. Both work in total power, without switching the secondary. An automated pipeline merges the GISMO data with the telescope data streams to create FITS files which are automatically processed by the reduction software crush to create logs, pointing results, and a first quick view of the data. Typical overheads for single science targets on the sky are 60%. The relative flux stability is about 8% (cf. report below).

Call for proposals for the summer semester 2013

GISMO is offered again to the community:

Documentation

Publications

  1. Dwek, Staguhn et al. 2011 ApJ,
    Star and dust formation activities in AzTEC-3: A starburst galaxy at z = 5.3

  2. Arendt et al. 2011 ApJ,
    The Radio - 2 mm Spectral Index of the Crab Nebula Measured with GISMO

  3. Capack et al. 2011 Nature,
    A massive proto-cluster of galaxies at a redshift of z~5.3

  4. Dicker et al. 2009 ApJ,
    90GHz and 150GHz observations of the Orion M42 region. A sub-millimeter to radio analysis

  5. Benford, Moseley, Zmuidzinas 2009 Journal of Physics
    Direct detectors for the Einstein inflation probe

  6. IRAM Newsletter 2/2009
    GISMO - The Goddard-IRAM Superconducting 2 Millimeter Observer tested at the IRAM 30m observatory

  7. Staguhn et al. 2008 Journal of Low Temperature Physics, 151, 3, 709
    GISMO, a 2 mm Bolometer Camera Optimized for the Study of High Redshift Galaxies

Support teams

Observing Runs

April 2013 - 3rd pool run

Pool projects and observers

Observing scripts

Data reduction

To reduce GISMO data with crush, first log into your project account: 

ssh -X project_number@mrt-lx3.iram.es

Raw data are stored in the directory ~/observationData/gismo. The scans are stored in a filing hierarchy, organised by source name, then an IRAM scan ID composed of a UT calendar date and a scan number. For example, the scan 113 taken on 2013-04-12 of M33 is stored as: 

~/observationData/gismo/M33/2013-04-12.113/M33_2013-04-12.113_gismo.fits

To reduce this scan with crush, type in your terminal: 

crush gismo -default -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113 -outpath=~/crush_reduction -name=M33

In the case of faint sources (S/N<10) you can use the option "faint": 

crush gismo -faint -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113 -outpath=~/crush_reduction -name=M33_faint

Other options to optimise the reduction are "bright" for strong sources (S/N>1000), "extended" for structures larger than the field of view, and "deep" for deep fields (faint point sources).

It is possible to add several scans: 

crush gismo -faint -datapath=~/observationData/gismo -object=M33 -date=2013-04-12 113-116 120 -date=2013-04-13 1-6 -outpath=~/crush_reduction -name=M33_faint_allscans

and also to combine different fields of view: 

crush gismo -faint -datapath=~/observationData/gismo -object=M33a -date=2013-04-12 113-116 120 -object=M33b -date=2013-04-14 21-23 -outpath=~/crush_reduction -name=M33ab_faint_allscans

For a detailed description of crush's options and capabilities, see the crush documentation.

November 2012 - 2nd pool run

Two weeks of dedicated GISMO observations have been carried out during November 2012.

Pool projects and observers

Daily reports

April 2012 - 1st pool run

In September 2011, GISMO had for the 1st time been offered to the community. Two weeks of dedicated GISMO observations have been carried out during April 2012.

Daily reports

Test plan

Test runs 2007-2012

5th alignment run, March 2012

4th test run, April 2011

3rd test run, April 2010

2nd test run, October 2008

1st test run, November 2007

GoddardIramSuperconductingTwoMillimeterCamera (last edited 2014-03-31 13:30:45 by gra-lx17)