J/AJ/149/162 The GBT 67-93.6GHz spectral line survey of Orion-KL (Frayer+, 2015)
The GBT 67-93.6 GHz spectral line survey of Orion-KL.
Frayer D.T., Maddalena R.J., Meijer M., Hough L., White S., Norrod R.,
Watts G., Stennes M., Simon R., Woody D., Srikanth S., Pospieszalski M.,
Bryerton E., Whitehead M., Ford P., Mello M., Bloss M.
<Astron. J., 149, 162 (2015)>
=2015AJ....149..162F 2015AJ....149..162F
ADC_Keywords: Surveys ; Molecular clouds ; Interstellar medium ; Radio lines
Keywords: instrumentation: miscellaneous - ISM: molecules - radio lines: ISM -
stars: formation - surveys
Abstract:
We present a 67-93.6GHz spectral line survey of Orion-KL with the new
4mm Receiver on the Green Bank Telescope (GBT). The survey reaches
unprecedented depths and covers the low-frequency end of the 3mm
atmospheric window which has been relatively unexplored previously.
The entire spectral-line survey is published electronically for
general use by the astronomical community. The calibration and
performance of the 4mm Receiver on the GBT is also summarized.
Description:
The 4mm Receiver is a dual-beam, corrugated feed horn receiver that
covers a frequency range of approximately 67-93GHz.
Orion-KL was observed using the 4mm Receiver on the Green Bank
Telescope (GBT; project GBT12A_364) during four observational sessions
between 2012 May 30 and 2012 June 15. The observed position of
Orion-KL was α(J2000.0)=05:35:14.28,
δ(J2000.0)=-05:22:27.5, corresponding to the bright continuum
peak.
Objects:
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RA (ICRS) DE Designation(s)
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05 35 14.16 -05 22 21.5 NAME ORION-KL = NAME BN NEBULA
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 20 68096 The GBT 67-93.6GHz spectrum of Orion-KL
table4.dat 46 140 Bright line measurements and identification
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See also:
J/ApJS/215/25 : Methyl formate (HCOOCH3) observations (Favre+, 2014)
J/A+A/572/A44 : Vibrationally excited vinyl cyanide in Orion-KL (Lopez+, 2014)
J/ApJ/779/119 : HCOOCH2D detection in Orion KL (Coudert+, 2013)
J/ApJ/769/48 : Water maser in Orion-KL with Herschel (Neufeld+, 2013)
J/A+A/559/A51 : HC3N in Orion KL (Esplugues+, 2013)
J/A+A/532/A32 : HCOOCH3 map of Orion-KL (Favre+, 2011)
J/ApJS/156/127 : 350um molecular line survey of Orion KL (Comito+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 F9.6 GHz Freq [66.99/93.60] Observed Frequency
(Local Standard of Rest)
11- 20 F10.6 K Tmb [-2.9/103.1] Main beam temperature (1)
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Note (1): Corrected for atmospheric and telescope losses.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 MHz Freq [67847/93195] Center line frequency
11- 15 F5.3 MHz e_Freq [0.01/0.3] Error in Freq
17- 21 F5.2 K Tmb [0.3/98.3] Fitted line peak in main beam
temperature (1)
23- 27 F5.2 K e_Tmb [0.03/11.5] Error in Peak main beam temperature
29- 32 F4.2 MHz FWHM [0.6/8.7] Measured Full-Width at Half-Maximum
of the line
34- 37 F4.2 MHz e_FWHM [0.03/0.74] Uncertainty in FWHM
39- 46 A8 --- Species Most likely species (molecule) associated
with the line
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Note (1): The results of fitting the brightest lines (Tmb>1K) with a Gaussian.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 22-May-2015