J1642+3948

General information

Source (J2000)IAU Source name (J2000)
J1642+3948
Source (B1950)IAU Source name (B1950)
1641+399
Common nameCommon name
3C 345
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 16 42 58.809900, δ = +39 48 36.993000
RedshiftRedshift
z = 0.595
Source typeOptical class
BL Lac object
Optical V magnitudeOptical V magnitude
mV = 16.5

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]
4.58
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
2.192 ± 0.154
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
61
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.194 ± 0.011
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
3026
Ba [μas]Major axis of the restoring beam [μas]
242
Bb [μas]Minor axis of the restoring beam [μas]
34
BPA [degrees]Position angle of the major axis [degrees]
-16.6
St [mJy]Total clean flux density [mJy]
1104
Sp [mJy/beam]Peak flux density [mJy/beam]
423
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
27
ξrQuality factor of the residual
noise in the image
0.97

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]
1 770 ± 234 396 ± 107 44 ± 12 0 0 10.535 ± 5.142 5.15 11.20
2 975 ± 374 217 ± 81 182 ± 68 198 ± 34 -109.3 ± 9.8 0.774 ± 0.506 N/A N/A
3 339 ± 176 141 ± 67 37 ± 18 67 ± 9 -65.4 ± 7.5 6.571 ± 5.598 N/A N/A
4 403 ± 215 127 ± 65 73 ± 37 723 ± 19 -131.1 ± 1.5 1.973 ± 1.763 N/A N/A
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]
3.68
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
3.689 ± 0.054
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
42
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.419 ± 0.021
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
2984
Ba [μas]Major axis of the restoring beam [μas]
204
Bb [μas]Minor axis of the restoring beam [μas]
34
BPA [degrees]Position angle of the major axis [degrees]
-6.9
St [mJy]Total clean flux density [mJy]
2563
Sp [mJy/beam]Peak flux density [mJy/beam]
705
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
12
ξrQuality factor of the residual
noise in the image
1.21

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 1090 ± 205 395 ± 70 55 ± 10 0 0 9.413 ± 2.952 5.48 11.50
2 1005 ± 258 201 ± 51 127 ± 32 176 ± 16 -105.2 ± 5.2 1.628 ± 0.715 N/A N/A
3 630 ± 234 100 ± 37 257 ± 94 807 ± 47 -109.2 ± 3.3 0.251 ± 0.160 N/A N/A
4 181 ± 74 109 ± 38 66 ± 23 1524 ± 12 -109.4 ± 0.4 1.079 ± 0.693 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
2011-05-01 eps, jpg eps, jpg eps, jpg fits