J/AJ/128/3053 Absolute flux distribution of BD +17 4708 (Bohlin+, 2004)
Absolute flux distribution of the SDSS standard BD +17°4708.
Bohlin R.C., Gilliland R.L.
<Astron. J., 128, 3053-3060 (2004)>
=2004AJ....128.3053B 2004AJ....128.3053B
ADC_Keywords: Stars, fundamental ; Spectroscopy ; Spectrophotometry
Keywords: stars: fundamental parameters - stars: individual (BD+17 4708) -
techniques: spectroscopic
Abstract:
Secondary flux standards are established by measuring their brightness
relative to primary standard stars. The Hubble Space Telescope (HST)
primary standards are the three pure-hydrogen white dwarf (WD) flux
standards that determine the sensitivity calibration for the Space
Telescope Imaging Spectrograph. STIS observations have defined the
flux of the Sloan Digital Sky Survey (SDSS, http://www.sdss.org)
standard BD+17 4708 from 0.17 to 1.0µm with an uncertainty of less
than 0.5% relative to the HST primary standards, as verified by two
independent sets of photometry.
Description:
Observations with a resolution R∼1000 in three STIS CCD modes - from
1680 to 3060Å (G230LB), from 2900 to 5690Å (G430L), and from
5300 to 10200Å (G750L) - were obtained at three epochs between 2002
September 24 and 2003 January 9.
Objects:
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RA (2000) DE Designation(s)
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22 11 31.4 +18 05 34 BD+17 4708 = HIP 109558
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 59 2839 Absolute flux distribution for BD+17 4708
table4.dat 59 8671 Absolute flux distribution for Vega from Bohlin
& Gilliland, 2004AJ....127.3508B 2004AJ....127.3508B
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 12 E12.6 0.1nm Wave Wavelength in units of angstroms
14- 24 E11.5 10mW/m2/nm Flux Flux in units of ergs/s/cm2/Angstrom
26- 36 E11.5 10mW/m2/nm e_Flux Poisson uncertainty in Flux
38- 48 E11.5 10mW/m2/nm suFlux Systematic uncertainty in Flux
50- 59 F10.5 0.1nm FWHM FWHM of the spectrophotometry resolution
in units of Angstroms
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 03-Jun-2005