J/MNRAS/428/2731 SgrA* emission at 7mm (Beaklini+, 2013)
SgrA* emission at 7 mm: variability and periodicity.
Beaklini P.P.B., Abraham Z.
<Mon. Not. R. Astron. Soc., 428, 2731-2740 (2013)>
=2013MNRAS.428.2731B 2013MNRAS.428.2731B
ADC_Keywords: Stars, nearby ; Radio sources
Keywords: Galaxy: centre - radio continuum: general
Abstract:
We present the result of 6yr monitoring of SgrA*, radio source
associated with the supermassive black hole at the centre of the Milky
Way. Single dish observations were performed with the Itapetinga radio
telescope at 7mm, and the contribution of the SgrA Complex that
surrounds SgrA* was subtracted and used as instantaneous calibrator.
The observations were alternated every 10-min with those of the HII
region SrgB2, which was also used as a calibrator. The reliability of
the detections was tested comparing them with simultaneous
observations using interferometric techniques. During the observing
period we detected a continuous increase in the SgrA* flux density
starting in 2008, as well as variability in time-scales of days and
strong intraday fluctuations.
Description:
The 7mm observations were performed between 2006 and 2012 with the
13.7m radome enclosed Itapetinga radio telescope, localized in Sao
Paulo, Brazil.
Objects:
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RA (2000) DE Designation(s)
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17 45 40.04 -29 00 28.2 SgrA* = NAME Sgr A*
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 30 260 Observation of SgrA* in 2006-2012
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See also:
J/A+A/502/91 : Proper motions of stars near SgrA* (Schoedel+, 2009)
J/A+A/511/A18 : NIR observations of stars near SgrA* (Schoedel+, 2010)
J/A+A/534/A117 : NIR polarimetry of sources near SgrA* (Buchholz+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "date" Date Observation date
13- 18 F6.1 d JD Julian date (JD-2450000)
21- 24 F4.2 Jy S7mm Flux density at 7mm
27- 30 F4.2 Jy e_S7mm rms uncertainty on S7mm
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jan-2014