J1224+2122

General information

Source (J2000)IAU Source name (J2000)
J1224+2122
Source (B1950)IAU Source name (B1950)
1222+216
Common nameCommon name
4C 21.35
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 12 24 54.458398, δ = +21 22 46.388540
RedshiftRedshift
z = 0.4335
Source typeOptical class
Quasar
Optical V magnitudeOptical V magnitude
mV = 17.5

Images and parameters

Observation epoch2010-10-01
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]
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
1.715 ± 0.036
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
63
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.348 ± 0.023
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
2970
Ba [μas]Major axis of the restoring beam [μas]
255
Bb [μas]Minor axis of the restoring beam [μas]
83
BPA [degrees]Position angle of the major axis [degrees]
-19.9
St [mJy]Total clean flux density [mJy]
1205
Sp [mJy/beam]Peak flux density [mJy/beam]
494
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
17
ξrQuality factor of the residual
noise in the image
0.9

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]
1 408 ± 121 383 ± 83 <33 0 0 >8.697 8.58 23.00
2 1434 ± 512 152 ± 54 614 ± 218 69 ± 109 27.8 ± 57.8 0.090 ± 0.055 N/A N/A

Downloads

Epoch Image UV plot RAD plot FITS file of Image
2010-10-01 eps, jpg eps, jpg eps, jpg fits