Observed Energy Distribution: Q1803+676 log nu0 log nu1 log nu2 log nuFnu Date Aper Filter Instrument Ref (Hz) (Hz) (Hz) (Jy Hz) (") or or Detector Telescope 9.70 9.70 9.70 < 6.24 - 0.4 - VLA AJ090,0405 12.48 12.40 12.56 < 11.80 1983 300.0 IRAS4 IRAS(AO) Table11 12.70 12.57 12.87 < 11.48 1983 300.0 IRAS3 IRAS(AO) Table11 13.08 13.00 13.20 < 11.56 1983 300.0 IRAS2 IRAS(AO) Table11 13.40 13.30 13.55 < 11.87 1983 300.0 IRAS1 IRAS(AO) Table11 13.90 13.86 13.94 12.04( + 0.02 - 0.02 ) 1988 Apr 25 6.0 L' IRTF Table9 13.93 13.88 14.00 11.97( + 0.14 - 0.21 ) 1984 Sep 14 5.0 L MMT Table9 13.93 13.88 14.00 12.11( + 0.04 - 0.04 ) 1985 Sep 27 5.0 L MMT Table9 14.13 14.11 14.19 12.02( + 0.02 - 0.02 ) 1984 Sep 14 5.0 K MMT Table9 14.13 14.11 14.19 12.04( + 0.02 - 0.02 ) 1985 Sep 27 5.0 K MMT Table9 14.13 14.11 14.19 12.01( + 0.02 - 0.02 ) 1988 Apr 25 6.0 K IRTF Table9 14.26 14.23 14.31 11.86( + 0.02 - 0.02 ) 1984 Sep 14 5.0 H MMT Table9 14.26 14.23 14.31 11.88( + 0.02 - 0.02 ) 1985 Sep 27 5.0 H MMT Table9 14.26 14.23 14.31 11.86( + 0.02 - 0.02 ) 1988 Apr 25 6.0 H IRTF Table9 14.38 14.35 14.45 11.81( + 0.02 - 0.02 ) 1984 Sep 14 5.0 J MMT Table9 14.38 14.35 14.45 11.84( + 0.02 - 0.02 ) 1985 Sep 27 5.0 J MMT Table9 14.38 14.35 14.45 11.79( + 0.02 - 0.02 ) 1988 Apr 25 6.0 J IRTF Table9 14.52 14.46 14.58 11.96( + 0.03 - 0.03 ) 1985 May 11 14.0 I MtHopk(24in) Table6 14.55 14.55 14.56 11.83( + 0.03 - 0.03 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.56 14.56 14.57 11.85( + 0.02 - 0.02 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.58 14.57 14.58 11.86( + 0.02 - 0.02 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.58 14.58 14.59 11.87( + 0.02 - 0.02 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.63 14.63 14.64 11.92( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.63 14.57 14.70 11.84( + 0.02 - 0.02 ) 1985 May 11 14.0 R MtHopk(24in) Table6 14.64 14.64 14.65 11.92( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.66 14.65 14.67 11.92( + 0.02 - 0.02 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.67 14.67 14.68 11.84( + 0.05 - 0.05 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.67 14.67 14.68 11.88( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.69 14.68 14.70 11.84( + 0.02 - 0.02 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.69 14.68 14.70 11.90( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.71 14.70 14.71 11.85( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.71 14.70 14.71 11.92( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.74 14.70 14.78 11.95( + 0.02 - 0.02 ) 1985 May 11 14.0 V MtHopk(24in) Table6 14.76 14.75 14.76 11.91( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.76 14.75 14.76 11.97( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.77 14.76 14.77 11.90( + 0.00 - 0.00 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.77 14.76 14.77 11.95( + 0.01 - 0.01 ) 1988 Sep 4 10.0 - MMT/FOGS Elvis,etal.1990 14.83 14.78 14.89 11.96( + 0.02 - 0.02 ) 1985 May 11 14.0 B MtHopk(24in) Table6 14.84 14.84 14.85 12.03( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.87 14.86 14.87 12.07( + 0.00 - 0.00 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.91 14.90 14.92 12.10( + 0.02 - 0.02 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.92 14.92 14.93 12.11( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.94 14.93 14.94 12.06( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.95 14.94 14.96 12.07( + 0.01 - 0.01 ) 1988 Jun 11 5.0 - MMT/Blue Elvis,etal.1990 14.99 14.99 15.00 12.05( + 0.03 - 0.04 ) 1987 May 22 15.0 - LWP10810 RDAF 15.01 15.00 15.02 12.09( + 0.02 - 0.02 ) 1987 May 22 15.0 - LWP10810 RDAF 15.02 15.02 15.03 12.15( + 0.02 - 0.02 ) 1987 May 22 15.0 - LWP10810 RDAF 15.04 15.03 15.05 12.12( + 0.02 - 0.02 ) 1987 May 22 15.0 - LWP10810 RDAF 15.06 15.05 15.07 12.08( + 0.02 - 0.02 ) 1987 May 22 15.0 - LWP10810 RDAF 15.08 15.07 15.09 12.03( + 0.02 - 0.03 ) 1987 May 22 15.0 - LWP10810 RDAF 15.10 15.09 15.11 11.98( + 0.03 - 0.03 ) 1987 May 22 15.0 - LWP10810 RDAF 15.12 15.11 15.13 12.01( + 0.03 - 0.03 ) 1987 May 22 15.0 - LWP10810 RDAF 15.16 15.15 15.17 12.14( + 0.06 - 0.06 ) 1987 May 22 15.0 - LWP10810 RDAF 15.17 15.17 15.18 12.03( + 0.04 - 0.04 ) 1987 May 22 15.0 - LWP10810 RDAF 15.18 15.18 15.19 11.99( + 0.03 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.20 15.19 15.20 12.11( + 0.03 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.21 15.20 15.22 12.12( + 0.02 - 0.02 ) 1987 May 23 15.0 - SWP31032 RDAF 15.25 15.25 15.26 12.02( + 0.02 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.29 15.28 15.30 12.03( + 0.03 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.31 15.30 15.32 12.06( + 0.02 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.37 15.36 15.38 11.95( + 0.02 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 15.39 15.38 15.40 12.01( + 0.03 - 0.03 ) 1987 May 23 15.0 - SWP31032 RDAF 17.38 16.68 17.93 10.90( + 0.21 - 0.09 ) 1979 Jun 16 - IPC IPC ApJ323,343