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havaintotornit-l@ursa.fi
viestiarkisto
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Kirkas supernova galaksissa M101. Löydettäessä 17 magnitudia, mutta
uusimman havainnon mukaan jo 14.8 mag. Pitäisi kirkastua jopa 11
magnitudiin muutamassa päivässä. Havaintoja kaivataan. CCD-kuvat
fotometrisilla suotimilla ovat kaikkein hyödyllisimpiä.
arto
AAVSO Special Notice #250
Possible Type-Ia Supernova in M101
August 24, 2011
P. Nugent et al. report in ATel #3581 that a possible Type-Ia supernova
has been discovered by the Palomar Transient Factory shortly after
eruption in the galaxy M101 and has been designated "PTF11kly". The
object is currently at a magnitude of g=17.2, but may well rise by
several magnitudes. The object is well placed within M101 for good
photometry, and observations of this potential bright SNIa are strongly
encouraged.
The (J2000) coordinates reported for the object are
RA: 14:03:05.81 , Dec: +54:16:25.4
There are currently no comparison stars available in VSP for this field;
please indicate clearly the comparison stars that you use for
photometry when reporting observations. Please retain your images
and/or photometry for recalibration when comparison star magnitudes
are available.
Charts for PTF11kly may be plotted with AAVSO VSP:
http://www.aavso.org/vsp
You should select the DSS option when plotting, as the galaxy will not
appear on standard charts.
This object has been assigned the name "PTF11kly" for use with AAVSO VSP
and WebObs; please use this name when reporting observations until it is
conclusively classified as a supernova and a proper SN name is assigned.
This Special Notice was prepared by Matthew Templeton.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
http://www.aavso.org/special-notice-archive
Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notification#specialnotices
--
Arto Oksanen
arto.oksanen_at_jklsirius.fi
Muurame, Finland
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