Return to Home Page
Date: Wed, 28 Jul 1993 17:09:25 +0300
From: granslo@argo.uio.no
Subject: *** WANTED: Observations of OJ 287 ***
Announcement from Dr. H. Lehto in the sci.astro news group:
-----------------------------------------------------------------------------
*************** WANTED: OBSERVATIONS OF OJ 287 ***************
Dear observer,
We have launched a major campaign to observe the BL Lac
object OJ 287 (0851+20) during 1993/1994. All the telescopes on
the Canaries are involved in this International project. This includes
the 4.2m William Herschel Telescope, 2.6m Nordic Optical Telescope,
2.5m Isaac Newton Telescope, 1.5m Carlos Sanchez Telescope, 1m Jacobus
Kapteyn Telescope, 18cm Carlsberg Automatic Meridian Transit Circle.
Other telescopes involved are located around the world eg. in Japan, Finland,
Germany, Italy, Spain, US, Mexico covering wavelengths from X-ray to radio.
in touch with us. Note that there is a long gap between Japan and Finland.
Both amateurs with telescopes in their backyards as well as professionals
which have access to telescopes are invited to build up the most complete
light curve of a BL Lac object.
This BL Lac object is highly variable and is normally about V=15.5, but may
brighten up to V=12 during a major outburst, smaller outbursts occur quite
frequently.
Variations are likely to be slow, but could also be very fast.
If you are an experienced observer and could observe this source please get
in touch with us.
In your reply please inlude at least the following information. This will
be extremely valuable for us in planning a detailed observing strategy.
1) Your name
2) Your email, postal mail address, phone and fax numbers
3) Level of your previous experience.
4) How often could you observe, what time of the night?
5) Telescope location, size and type (optical, Radio, IR, etc.)
6) If optical
a) State which instruments you could use (eg. visual, photographic,
photoelectric, uncooled CCD, cooled CCD,
other)
b) Filters you could use (none, if U B V R or I (which system?) ....)
7) If other
a) The respective relevant information.
If you intend to participate please send the stated information to
Internet hlehto@sara.utu.fi or DECNET/SPAN 22104::SARA::HLEHTO
or
FAX: +358-21-2433767 CC: Harry/OJ-94
or
Dr. Harry J Lehto/OJ-94
Turku University Observatory
Vaisalantie 20
FIN-21500 Piikkio, FINLAND.
-----------------------------------------------------------------------------
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
