Re: 0235+16 radio/optical flare

[Eric Perlman <perlman@jca.umbc.edu>]

0235 has an emission line redshift, so it is pretty iron-clad...

Eric

Brenda Dingus wrote:
> Depending on the intensity MAGIC might have a chance. Also, how firm 
> is the redshift for this BL Lac?
> Brenda
>
> Brenda Dingus
> P-23, MS H803                          dingus@lanl.gov
> Los Alamos National Lab     Phone:505-667-0400
> Los Alamos, NM 87545          Fax:     505-665-4121
> ----- Original Message ----- From: "Berrie Giebels" 
> <berrie@poly.in2p3.fr>
> To: "Matthias Kadler" <mkadler@milkyway.gsfc.nasa.gov>
> Cc: <AGNlist@glast.stanford.edu>; <gammamw@olegacy.gsfc.nasa.gov>
> Sent: Thursday, January 25, 2007 11:18 AM
> Subject: Re: 0235+16 radio/optical flare
>
>
>>
>>
>> At z=0.94 we probably will not have to alert the VHE observatories..
>>
>>
>> On Thu, 25 Jan 2007, Matthias Kadler wrote:
>>
>>> Hi everybody,
>>>
>>> one of "our" sources is right now having a very bright mm radio flare:
>>>
>>> http://sma1.sma.hawaii.edu/callist.html?plot=0238%2B166
>>>
>>> Claudia Raiteri from the WEBT told me that the optical state is also 
>>> very high and very variable. On Sunday and Monday, Swift will 
>>> observe the source for 10ksec each with the XRT and the four bluest 
>>> filters of the UVOT. I have already asked Claudia to spread this 
>>> among the WEBT partners but I wanted to let you know, as well. If 
>>> anybody has suggestions for further complementary observations, 
>>> please let me know.
>>>
>>> This source is a BL Lac object that is famous for various reasons: 
>>> EGRET source, possible microlensing candidate, correlated 
>>> multi-wavelength variability, extremely compact structure almost 
>>> unresolved even at microarcsec resolution, extreme short-term radio 
>>> variability indicating a Doppler factor of ~100, possible 5.7yr 
>>> periodicity between main outbursts and last but not least it has 
>>> become famous for skipping its latest predicted outburst in spring 
>>> 2004.
>>>
>>> It is probably too early to say if this is now the delayed major 
>>> outburst or if this flare gets stuck somewhere in the 
>>> medium-amplitude mm regime. The latest data point from Jan 23 is 
>>> already a bit lower than the ones from Jan 11/12. But for many 
>>> years, this is certainly the most exciting event in this object.
>>>
>>> Matthias
>>>
>>> -- 
>>> Dr. Matthias Kadler
>>> NASA Postdoctoral Research Associate
>>> Astrophysics Science Division
>>> Code 662
>>> NASA's Goddard Space Flight Center Greenbelt, MD 20771
>>> tel: 301-286-4390
>>> fax: 301-286-1684
>>> e-mail: mkadler@milkyway.gsfc.nasa.gov
>>>
>>
>> - Berrie
>>
>

-- 
Eric S. Perlman, Associate Professor 		eperlman@fit.edu
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