Чес. слово, мне приходила в голову эта идея...
Dr. Christian Knigge, University of Southampton, England просит наблюдателй переменных звёзд в течение нескольких недель начиная с 21 Февраля мониторить 10 карликовых новых (список ниже) и как можно оперативнее сообщать свои визуальные или ПЗС наблюдения в AAVSO. Обнаружение вспышки у одной из этих звёзд будет сигналом к началу наблюдений на радиотелескопе VLA! Цель наблюдений - обнаружить возможно формирующиеся в системах карликовых новых джеты на подобие тех, что наблюдаются в некоторых рентгеновских двойных.
От себя добавлю что на данный момент общественное мнение склоняется к тому что никаких джетов там нет, потому что не может быть никогда... Моя же идея заключалась в том, чтобы искать радиоджеты не у простых карликовых новых, а у редко, но особенно мощьно вспыхивающих звёзд типа WZ Sge. Так что если Dr. Christian Knigge ничего не найдёт, следующая заявка на наблюдения на VLA будет моя.
![Cool 8)](http://www.ka-dar.ru/forum/Smileys/classic/cool.gif)
А пока надо бы поддержать всеми силами проворного англичанина.
![Cheesy :D](http://www.ka-dar.ru/forum/Smileys/classic/cheesy.gif)
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
49 Bay State Road, Cambridge, MA 02138 USA
aavso@aavso.org Tel. 617-354-0484 Fax 617-354-0665
AAVSO ALERT NOTICE 345 (February 15, 2007)
SUBJECT: REQUEST TO MONITOR CATACLYSMIC VARIABLES FOR RADIO OBSERVATIONS
Dr. Christian Knigge, University of Southampton, England, has requested
our assistance in monitoring ten (10) dwarf nova cataclysmic variables as
part of a search for radio jet formation during outbursts. Dr. Knigge is
attempting to observe a dwarf nova outburst within six hours of the
outburst onset using the NRAO Very Large Array (VLA) telescope in New
Mexico and the Jodrell Bank MERLIN telescope in the United Kingdom. Rapid
optical detection of an outburst onset will be used to trigger
target-of-opportunity (TOO) observations with both radio telescopes to
study the behavior of dwarf novae outbursts in the radio region of the
spectrum, and to determine whether CV systems are capable of forming radio
jets similar to those observed in X-ray bursters and other X-ray binaries.
Continuous optical monitoring and rapid reporting of these dwarf novae is
requested beginning February 21. The program will continue for at least
several weeks, as Dr. Knigge has been allocated six TOO activations of the
VLA-MERLIN network.
Rapid reporting of observations is critical to the success of this
project. Observers are requested to report observations within one (1)
hour to the AAVSO using WebObs or EmailObs, especially if an object
appears to be in transition to outburst. Quiescent and full outburst
observations are also important, so please report all observations
promptly.
Both visual and CCD observations are requested, but CCD time-series should
only be performed if the data can be reduced and submitted immediately.
The table below lists the ten target dwarf novae, and for each gives the
type, the range according to visual/V observations in the AAVSO
International Database, and the outburst threshold, that is, the magnitude
that when reached by the star usually indicates an outburst is truly
underway.
Desig. Name R.A.(2000) Dec.(2000) Type Range Outburst
(V or visual) threshold
0058+40 RX AND 01:04:35.55 +41:17:58.0 UGZ 10.2 - 15.6 12.5 V
0749+22 U GEM 07:55:05.2 +22:00:04 UGSS+E 8.8 - 15.3 13.5
0803+62 SU UMA 08:12:28.20 +62:36:22.6 UGSU 10.8 - 15.6 13.6
0804+28 YZ CNC 08:10:56.62 +28:08:33.6 UGSU 10.4 - 16.3 13.5
0814+73 Z CAM 08:25:13.20 +73:06:39.23 UGZ 10.2 - 14.0 11.4
0855+18 SY CNC 09:01:03.35 +17:53:56.1 UGZ 10.8 - 14.1 12.7
1804+67 EX DRA 18:04:14.12 +67:54:12.2 UG+E 12.3 - 17.0 14.1
1934+30 EM CYG 19:38:40.10 +30:30:28.0 UGZ 11.8 - 14.4 13.4
1953+77 AB DRA 19:49:06.50 +77:44:23.5 UGZ 12.0 - 15.4 14.0
2138+43 SS CYG 21:42:42.80 +43:35:09.88 UGSS 8.2 - 12.4 11.0
AAVSO charts for these objects may be found at:
RX AND (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=RX%20And )
U GEM (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=U%20Gem )
SU UMA (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=SU%20UMa )
YZ CNC (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=YZ%20Cnc )
Z CAM (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=Z%20Cam )
SY CNC (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=SY%20Cnc )
EX DRA (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=EX%20Dra )
EM CYG (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=EM%20Cyg )
AB DRA (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=AB%20Dra )
SS CYG (
http://www.aavso.org/cgi-bin/searchcharts3.pl?name=SS%20Cyg )
As usual, when reporting observations please be sure to indicate the
chart(s) and comparison stars used.
Your careful observations and prompt reporting are essential to the
success of this ambitious project. Many thanks for your astronomical
contributions!
Good observing,
Matthew Templeton
Staff Astronomer
Elizabeth O. Waagen
Senior Technical Assistant
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/observing/submit/If you cannot access this URL, please contact us for submission details.
You may also use our charge-free number (888-802-STAR = 888-802-7827) or
our fax (617-354-0665) to report your observations.
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An Alert Notice archive is available at the following URL:
http://www.aavso.org/publications/alerts/Subscribing and Unsubscribing can be done at the following URL:
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