J0957+5522

General information

Source (J2000)IAU Source name (J2000)
J0957+5522
Source (B1950)IAU Source name (B1950)
0954+556
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 09 57 38.184500, δ = +55 22 57.768000
RedshiftRedshift
z = 0.899
Source typeOptical class
BL Lac object
Optical V magnitudeOptical V magnitude
mV = 17.7

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]
0.54
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.244 ± 0.021
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
47
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.342 ± 0.013
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
3087
Ba [μas]Major axis of the restoring beam [μas]
116
Bb [μas]Minor axis of the restoring beam [μas]
38
BPA [degrees]Position angle of the major axis [degrees]
-7.2
St [mJy]Total clean flux density [mJy]
306
Sp [mJy/beam]Peak flux density [mJy/beam]
236
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
11
ξrQuality factor of the residual
noise in the image
0.83

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]
1 229 ± 74 231 ± 52 <16 0 0 >26.656 10.30 29.40

Downloads

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