Recent Bright Supernovae

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Recent Bright Supernovae

• Wayne Johnson (aka Mr. Galaxy)
• Benson, AZ
• Presented at the AAVSO Spring Meeting in Las
  Cruces, NM
• 21 March 2005

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Outline

• Supernovae of 2004
• General Information (sample SN web pages that
  give SN discovery announcements, annual
  statistics on number of SNe discovered, types of
  SNe, brightness distribution, etc.)
• Images found on those websites
• Sample light curves from several web sites
  (observations still needed!)
• Supernovae of 2005
• General Information (date of discovery,
  location, etc. )
• Images (observations needed to make light
  curves!)

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Latest Supernovae (by David Bishop)
All active SNover mag 17.0
A long time ago, in a galaxy far far away, a star
exploded.   This star exploded so violently that
for a few weeks the star outshone its parent
galaxy.   This type of explosion is called a
Supernova.   The last one in our galaxy was 400
years ago, making us about 300 years overdue for
the next one.   On this web page you will find a
list of the currently observable supernovae,
along with information on their location,
reference images, and their last reported
brightness.  Most of the supernova information
found on this page comes from IAU Circulars and
occasionally more data can be found on IAU's List
of Recent Supernovae web page.  Information on
the current brightness and much of the background
information is provided by VSNet. These web pages
have brought you the latest in supernovae data
and images since April 1997. New discoveries
2005am is a bright type Ia on the rise, note that
there is a bright star about 8" SW of the
supernova.   Very southern 2005af is a bright
type II.   2005V in NGC 2146 appears to only be
visible in IR.   2005W is a type Ia on the rise.
  2005P the 4th supernova found recently in NGC
5468 is an older peculiar type Ia.   2005O is a
type Ib found near maximum light.   2005E is a
type Ib/c (probably Ib) some distance from NGC
1032.   2004gt is in the nearby type Ib at max in
the Antennae Galaxy.   2004et and 2004dj are now
starting to fade rapidly.   For the year 2005, 45
supernovae have been reported (249 last year).  
The brightest supernova reported for the year so
far is 2005af at mag 12.5, followed by 2005am at
13.5 and 2005W at 14.0.   Extragalactic Novae
now have their own page.   VSNet is down.  
Please send your observations here.   The
magnitudes on my web page are driven from these
observations.   CBAT has password protected all
IAU Circulars.   Your password will be in your
last subscription notice.   A collaboration of
astronomers consisting of most of the
professional supernova science community has been
granted 154 orbits of observation on HST to
observe young type Ia supernovae.   This is the
second largest proposal ever approved.   LOSS ask
people who discover supernovae to provide an
offset from a nearby star to make spectroscopy
easier.   Occasionally, some links (particularly
for IAUC) will not be immediately active.  Look
at the updates page for a list of the most recent
changes and additions to these pages.Web page
last modified on Mon, 14 Mar 2005 033639 GMT,
- last observation is over one month old.    
X - click here before viewing image.
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Magnitude Distribution for SNe in 2004from data
found on the Latest SNe web page
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SN2004dj in NGC2403 (imaged by Krisztian
Sarneczky)
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SN2004dj Light Curve (courtesy The Astronomer)
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SN2004dj BVRI Light Curves (from observations by
JM Llapasset)
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SN2004dj (Type IIP) C CR Light Curves from
observations by JM Llapasset
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SN2004dj Data Points (from the SNWeb Website,
authored by Jean-Claude Pelle)
Measures
Unreliable measures are flagged in red Click
here to send your measures of SN2004dj to SNWeb2
!                                              
                                                  
                                                La
st Update 14 mars 2005 SN Home Page SN 2004
SN 2004dj Images Curves Software SNWeb
provided by Jean-Claude PELLE
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SN2004dj (Type IIP) Light Curve data in several
bands from many observers (SNWeb)
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SN2004dj Observations (from the VSNET
announcement service, website currently down)

• If you have observations of this Supernova,
  please send them to vsnet-obs_at_kusastro.kyoto-u.ac.
  jp.
• Use this VSNet data query to see what information
  has been reported so far.
• Other VSNet data on this SN
• vsnet-campaign-sn 929 SN 2004dj (mag 11!)
• vsnet-campaign-sn 930 SN 2004dj in NGC 2403 -
  visual magn. estimate
• vsnet-campaign-sn 931 very bright SN 2004dj in
  NGC 2403
• vsnet-campaign-sn 934 SN 2004dj image
  (corrected)
• vsnet-campaign-sn 935 SN II 2004dj
• vsnet-campaign-sn 937 Identification of
  progenitor of SN 2004dj
• vsnet-campaign-sn 939 Re Identification of
  progenitor of SN 2004dj
• vsnet-campaign-sn 940 SN 2004dj photometry
  update (Aug. 6.4 UT)
• vsnet-campaign-sn 952 SN 2004dj photometry
  update (Aug. 14.4 UT)
• vsnet-campaign-sn 953 SN information from IAUC
  8388
• vsnet-campaign-sn 956 Re Identification of
  progenitor of SN 2004dj
• vsnet-campaign-sn 972 SN2004dj observations by
  Mhh
• vsnet-campaign-sn 995 SN 2004dj photometry
  update (Oct. 7.8 UT)
• vsnet-campaign-sn 999 SN 2004dj and 2004et obs
  by S. Yoshida
• vsnet-campaign-sn 1001 SNe information from
  IAUC 8420
• vsnet-campaign-sn 1006 SN 2004dj photometry
  update (Nov. 2.4 UT)

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SN2004et in NGC 6946 (8th SN!)
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AAVSO Announcement of SN2004et in NGC 6946
203359 SUPERNOVA 2004et in NGC 6946
(CEPHEUS) AAVSO Newsflash Special Notice
(September 30, 2004) We have been informed by
the Central Bureau for Astronomical Telegrams
(Central Bureau Electronic Telegram 95) that T.
Zwitter, University of Ljubljana, and U. Munari,
Astronomical Observatory, Padova, report that S.
Moretti discovered a bright supernova in NGC 6946
at CCD magnitude 12.8 on unfiltered images taken
September 27 using a 0.4-m telescope at Ravenna.
Position SN 2004et is located at R.A. 20h
35m 25.4s, Decl. 60o 07' 17.6" (equinox
2000.0). A high-resolution spectrogram obtained
on September 28 with the 1.82-m telescope (
echelle spectrograph) in Asiago shows the new
object to be a supernova. For more information,
please see CBET 95. NGC 6946 is the home of SN
1980K, which reached visual magnitude 10.7,
according to observations in the AAVSO
International Database. AAVSO 'e' and 'f' scale
charts of NGC 6946 are available at
http//www.aavso.org/cgi-bin/searchcharts3.pl?nam
engc206946 Please use this chart to observe
the supernova and report your observations of
203359 SN 2004ET to AAVSO, making sure to
indicate which comparison stars you used.
Congratulations to S. Moretti on this discovery!
Please report observations to AAVSO using the
WebObs online submission tool at www.aavso.org,
via email to observations_at_aavso.org, telephone
(617-354-0484), or fax [phone]). Many
thanks for your valuable astronomical
contributions! Good observing, Elizabeth O.
WaagenInterim Director
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AAVSO Chart for SN2004et in NGC 6946
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SN2004et (Type II) BVRI Light Curves from SNWeb
Webpage
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Current Info for two selected 2005 SNe(from the
Latest Supernovae webpage)


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SN2005af (Type II) in NGC 4945 (CSP/LCO image)
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SN2005am (Type Ia) in NGC 2811 (CSP/LCO Image)
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Concluding Remarks

• This paper presents some of the resources
  available on the Web for observing, reporting and
  following-up current SNe.
• Though many SNe are faint, and only suitable for
  CCD observations, there is still a chance to
  observe several SNe visually each year.

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SN Web Resources

• Bright (aka Latest) Supernovae - based in the US,
  excellent source of current SN activity with
  images and links David Bishop
• ( http//www.rochesterastronomy.org/snimages/ )
• Central Bureau for Astron. Telegrams (CBAT) -
  based in the US, excellent announcement service
  for many transient events, but paid subscription
  is necessary for access to data. Report
  discoveries
• ( http//cfa-www.harvard.edu/iau/DiscoveryInfo.ht
  ml )
• International Supernova Network (ISN) - based in
  Italy, good source of statistical data and
  observation techniques (http//www.supernovae.net/
  isn.htm)
• SNWeb - based in France, good source for SN light
  curves
• ( http//www.astrosurf.com/snweb2/ )
• The Astronomer - based in England, tracks most
  transient events (http//www.theastronomer.org/sup
  ernovae.html)
• AAVSO Webpage - based in the US, tracks variable
  stars
• ( http//www.aavso.org/ )