Source	Epoch	Contour PostScript	Colour PostScript	Colour GIF
1652+398 (Mrk 501, 4C +39.49, OS +387, DA 426) Galaxy z= 0.03366 V= 14.1 Notes (from the published papers): Mrk 501 has a diffuse twisting jet which has been studied in more detail by Conway \& Wrobel (1995). A very high energy (E > 300 Gev) $\gamma$-ray flare was observed in April 1997 (Catanese et al 1997).	04/1995 12/1995 07/1996 03/1997 10/1998 07/1999 12/2001	PS PS PS PS PS PS PS	PS PS PS PS PS PS PS	GIF GIF GIF GIF GIF GIF GIF

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