J/PASP/124/140 UBVRI Hp BT and VT photonic responses (Bessell+, 2012) ================================================================================ Spectrophotometric libraries, revised photonic passbands, and zero points for UBVRI, Hipparcos, and Tycho photometry. Bessell M., Murphy S. =2012PASP..124..140B ================================================================================ ADC_Keywords: Photometry, sensitivity functions ; Photometry, UBVRI Keywords: stars Abstract: We have calculated improved photonic passbands for the UBVRI, Hipparcos Hp, and Tycho BT and VT standard systems using the extensive spectrophotometric libraries of NGSL and MILES. Using the Hp passband, we adjusted the absolute flux levels of stars in the spectrophotometric libraries so that their synthetic Hp magnitudes matched the precise Hipparcos Catalogue value. Synthetic photometry based on the renormalized fluxes was compared with the standard UBVRI, BT and VT magnitudes, and revised synthetic zero points were determined. The Hipparcos and Tycho photometry system zero points were also compared with the V-magnitude zero points of the SAAO UBVRI system, the homogenized UBV system, and the Walraven VB system. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 54 37 Normalized UBVRI photonic responses table2.dat 32 56 Normalized Hp BT, and VT photonic responses -------------------------------------------------------------------------------- See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) J/AJ/140/1919 : Zero point spectral energy distribution (Engelke+, 2010) J/PASP/120/1128 : Calibrated griz magnitudes of Tycho star (Ofek, 2008) Byte-by-byte Description of file:table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 0.1nm lam.U ? Wavelenght in U 6- 10 F5.3 --- U ? Normalized response in U 12- 15 I4 0.1nm lam.B ? Wavelenght in B 17- 21 F5.3 --- B ? Normalized response in B 23- 26 I4 0.1nm lam.V ? Wavelenght in V 28- 32 F5.3 --- V ? Normalized response in V 34- 37 I4 0.1nm lam.R ? Wavelenght in R 39- 43 F5.3 --- R ? Normalized response in R 45- 48 I4 0.1nm lam.I ? Wavelenght in I 50- 54 F5.3 --- I ? Normalized response in I -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 0.1nm lam.Hp ? Wavelenght in Hp 6- 10 F5.3 --- Hp ? Normalized response in Hp 12- 15 I4 0.1nm lam.BT ? Wavelenght in BT 17- 21 F5.3 --- BT ? Normalized response in BT 23- 26 I4 0.1nm lam.VT ? Wavelenght in VT 28- 32 F5.3 --- VT ? Normalized response in VT -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 11-Feb-2013