J1808+4542

General information

Source (J2000)IAU Source name (J2000)
J1808+4542
Source (B1950)IAU Source name (B1950)
1806+456
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 18 08 21.885884, δ = +45 42 20.866390
RedshiftRedshift
z = 0.83
Source typeOptical class
Quasar
Optical V magnitudeOptical V magnitude
mV = 19.3

Images and parameters

Observation epoch2011-10-01
S86 GHzTotal single dish flux density measured at 86 GHz obtained from pointing and calibration scan measurements at Pica Veleta or Plateau de Bure [Jy]
0.44
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.373 ± 0.038
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
18
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.402 ± 0.031
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
2140
Ba [μas]Major axis of the restoring beam [μas]
205
Bb [μas]Minor axis of the restoring beam [μas]
73
BPA [degrees]Position angle of the major axis [degrees]
35.6
St [mJy]Total clean flux density [mJy]
183
Sp [mJy/beam]Peak flux density [mJy/beam]
181
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
9
ξrQuality factor of the residual
noise in the image
0.93

Component
StotTotal flux density of the component [mJy]
SpeakPeak flux density of the component [mJy/beam]
dComponent size [μas]
rComponent's offset from the core [μas]
θPosition angle of the offset [degrees]
TbBrightness temperature obtained from the model fits [1010K]
Tb,minVisibility based estimate of the minimum brightness temperature [1010K]
Tb,limVisibility based estimate of the maximum brightness temperature [1010K]
1 172 ± 56 182 ± 41 <31 0 0 >5.560 4.42 12.00

Downloads

Epoch Image UV plot RAD plot FITS file of Image
2011-10-01 eps, jpg eps, jpg eps, jpg fits