J1823+6857

General information

Source (J2000)IAU Source name (J2000)
J1823+6857
Source (B1950)IAU Source name (B1950)
1823+689
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 18 23 32.853905, δ = +68 57 52.612470
RedshiftRedshift
N/A
Source typeOptical class
BL Lac object
Optical V magnitudeOptical V magnitude
mV = 19

Images and parameters

Observation epoch2011-05-01
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]
0.1
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.213 ± 0.016
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
62
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.088 ± 0.007
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
3061
Ba [μas]Major axis of the restoring beam [μas]
83
Bb [μas]Minor axis of the restoring beam [μas]
37
BPA [degrees]Position angle of the major axis [degrees]
-67.3
St [mJy]Total clean flux density [mJy]
98
Sp [mJy/beam]Peak flux density [mJy/beam]
72
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
2
ξrQuality factor of the residual
noise in the image
1.11

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 77 ± 18 70 ± 12 18 ± 3 0 0 4.065 ± 1.381 2.50 3.25
2 12 ± 8 14 ± 6 <25 41 ± 5 -141.6 ± 7.1 >0.328 N/A N/A

Downloads

Epoch Image UV plot RAD plot FITS file of Image
2011-05-01 eps, jpg eps, jpg eps, jpg fits