Hi

Try Maurice Gavin's page for starters. Loads of good material and some
images.

http://www.astroman.fsnet.co.uk/quasars.htm

(I was looking for this to add to my first post but couldn't find it)

Good luck
Regards
Paul
"Anthony Ayiomamitis" <anthony@perseus.no2spam.gr> wrote in message
news:etk7qi$tga$1@mouse.otenet.gr...

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated and
the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude
20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on
black).

Anthony.

Paul Clark wrote:

Hi,

A lovely image...
..but for example
http://www.guildfordas.org/observing/quasar_episode.html
~7 billion light years (I am not a member of the Guildford AS).

There are apparently quite a few others as well as AGNs that are
observed, imaged and monitored by amateurs.

Regards
Paul

"Anthony Ayiomamitis" <anthony@perseus.no2spam.gr> wrote in message
news:etjiso$k9m$1@mouse.otenet.gr...


Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's
backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated
and the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude 20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on black).

Anthony.

On Mar 18, 2:34 pm, Anthony Ayiomamitis <anth...@perseus.no2spam.gr
wrote:

Dear Friends,

A huge thanks for the various recommendations surrounding other
interesting quasars and which I will mark down for immediate imaging.

Nevertheless, I am delighted to see the thread that has been generated
and the really cool tips (targets) that have ensued. I am quite eager to
pursue PC 1247+3406 in Canes Venatici which I think (?) is the further
quasar found so far (over 12 billion light-yrs away and at magnitude 20.4).

Can someone enlighten me how to convert the redshift to percent of the
speed of light? Also, Ioanni, I do have the regular image (white on black).

Anthony.


Anthony,

In SR the redshift formula is:

1 + z = SQRT[(c + v)/(c - v)]

Solving for v (recession velocity) yields:

v = [(1 + z)^2 -1/(1 + z)^2 +1]

An easier keypunch is:

v = (1 + z)^2 c - c/ (1 + z)^2 +1

Regards

Ben

Dear Friends,
The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's backyard).
snip

Dear Friends,

The quasar 3C273 in Virgo is the brightest visible quasar from Earth and
with a magnitude of 12.8 is also visible with average amateur equipment.
Lying at a distance of two BILLION light-years away, it is the furthest
any amateur equipment can reach (and especially right from one's backyard).

Further details including an image are available at
http://www.perseus.gr/Astro-DSO-QSO-3C273.htm .

Anthony.

It is a great shot. Unfortunately your diffraction spikes line up with
where the jet might hope to be seen (roughly diametrically oppposite
the fainter of the two close in stars. I suspect it may be beyond
impossible for amateur kit to capture by it might be interesting to
try for...