IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:32

1 June 2010
IAU Electronic Telegram No.2299


SUPERNOVA 2010dn IN NGC 3184

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata) of an apparent supernova (mag 17.5) on unfiltered CCD
frames (limiting mag 19.0) taken on May 31.523 UT using a 0.60-m f/5.7
reflector (+ Bitran BT-214E camera). The new object is located at R.A. =
10h18m19s.89, Decl. = +41d26'28".8 (equinox 2000.0), which is 33" east and
61" north of the center of NGC 3184. Nothing is visible at this position on
Itagaki's past images taken on 2009 Mar. 30.612 (limiting mag 19.0) and on
2010 May 21.503 (limiting mag 18.0) or on the Digitized Sky Survey.
Itagaki's discovery image has been posted at the following website URL:
http://www.k-itagaki.jp/images/psn3184.jpg. After posting on the Central
Bureau's unconfirmed-objects webpage, T. Yusa (Osaki, Japan) writes that
fourteen co-added 60-s unfiltered CCD exposures (limiting mag 19.5) taken
on June 1.48 with a 0.30-m f/8.2 reflector (+ SBIG ST-6 camera) yield mag
17.1 and position end figures 19s.84, 28".4 for 2010dn.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 1
(CBET 2299)
Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:33

2 June 2010
IAU Electronic Telegram No.2300


2010dn IN NGC 3184

J. Vinko, University of Szeged; G. H. Marion, Harvard-Smithsonian Center
for Astrophysics and University of Texas; J. C. Wheeler, University of Texas;
and R. J. Foley and R. P. Kirshner, Harvard-Smithsonian Center for
Astrophysics, report that 2010dn (cf. CBET 2299) is probably an outburst of a
luminous blue variable (LBV). A spectrum, obtained on June 2.12 UT with the
9.2-m Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by S.
Rostopchin, shows prominent, narrow Balmer lines in emission, superimposed on
a moderately blue continuum corresponding to a blackbody temperature of about
6500 K (assuming no interstellar extinction). No broad spectral features are
obvious, but both the Ca II near-infrared triplet and the [Ca II] features at
730 nm are visible. The [Ca II] feature may be associated with circumstellar
dust (cf. Foley et al. 2010, http://lanl.arxiv.org/abs/1002.0635) and could
explain the non-detection of the progenitor in pre-explosion Hubble Space
Telescope images (Berger 2010, http://www.astronomerstelegram.org/?read=2655).
The FWHM of H-alpha is 1200 km/s, while the equvalent width of the Na D
feature is 0.33 nm, indicative of a relatively large host reddening.
According to SNID (Blondin and Tonry 2007, Ap.J. 666, 1024), the spectrum is
most similar to several LBV spectra. The faintness of the transient (mag
about 17; cf. CBET 2299), corresponding to absolute magnitude -13.4 at the
distance of the host (about 12 Mpc), gives further evidence that 2010dn is
a giant LBV outburst, and not a supernova.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 June 2 (CBET 2300) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:34

2 June 2010
IAU Electronic Telegram No.2301


SUPERNOVA 2010do IN NGC 5374

L. A. G. Monard, Pretoria, South Africa, reports his discovery of
an apparent supernova (mag 17.2) on several unfiltered CCD images taken
on June 1.787 UT at his Bronberg Observatory. The new object, which was
confirmed at mag 17.1 by Monard on June 2.756, is located at R.A. =
13h57m28s.11, Decl. = +6d05'48".5, which is 23" west and 2" south of the
galaxy core of NGC 5374. Nothing is seen at this position on Monard's
previous image of this galaxy taken on Apr. 15.842 (limiting mag 18.8) or
on the Digitized Sky Survey (limiting red mag 20.5).
After posting on the Central Bureau's unconfirmed-objects webpage,
A. Narla, S. B. Cenko, W. Li, and A. V. Filippenko, University of California,
report the independent LOSS discovery of 2010do on unfiltered KAIT images
(cf. CBET 2285):

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010do June 2.25 13 57 28.06 + 6 05 48.3 17.6 24".4 W

Nothing was visible at this position on a KAIT image from May 8.34
(limiting mag 19.3).
The type-II supernova 2003bl also appeared in NGC 5374 (cf. IAUC 8086).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 June 2 (CBET 2301) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:35

3 June 2010
IAU Electronic Telegram No.2302


SUPERNOVA 2010dp

Further to CBET 2296, M. Catelan, Pontificia Universidad Catolica de
Chile; A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R.
Williams, California Institute of Technology; R. McNaught and G. Garradd,
Australian National University; J. L. Prieto, Carnegie Observatories; and
E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University
of Arizona, report the CRTS discovery of a supernova in unfiltered Siding
Spring Survey images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010dp May 18.42 9 32 03.70 - 5 53 38.1 16.7 1".8 S

Further magnitudes for 2010dp: Apr. 13.13 UT, [19.2 (Catalina Sky
Survey); May 30.12, 17.0 (J. Brimacombe, Cairns, Australia; unfiltered
images taken remotely with a telescope near Mayhill, NM, U.S.A.).
A spectrogram (range 380-920 nm) of 2010dp was obtained with the SMARTS
1.5-m telescope on June 1.97; cross-correlation with a library of
supernova spectra using the "SuperNova IDentification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) shows 2010dp to be similar to
the type-Ia supernova 1999aa at one month past maximum light.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 June 3 (CBET 2302) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:35

3 June 2010
IAU Electronic Telegram No.2303


SUPERNOVA 2010dq IN NGC 57

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata) of an apparent supernova (mag 17.3) on unfiltered CCD
frames (limiting mag 19.0) taken on June 3.71 UT using a 0.60-m f/5.7
reflector (+ Bitran BT-214E camera). Itagaki then found a pre-discovery
image of 2010dq at mag 18.0 on an unfiltered CCD frame (limiting mag 18.5)
that he had taken on May 31.748. The new object is located at R.A. =
0h15m29s.70 +/- 1".7, Decl. = +17d19'41".0 +/- 0".3 (equinox 2000.0), which
is 17" west and 1" south of the center of NGC 57. Nothing is visible at this
position on Itagaki's many past frames, including one from 2007 Aug. 20.66
(limiting mag 19.0), or on the Digitized Sky Survey. Itagaki has posted
images of 2010dq at website URL http://www.k-itagaki.jp/images/psn57.jpg.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 3 (CBET 2303) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:36

4 June 2010
IAU Electronic Telegram No.2304


SUPERNOVA 2010dr IN MCG +08-1-3

T. Boles, Coddenham, England, reports the discovery of an apparent
supernova (mag 18.5) on unfiltered CCD images taken on June 3.086 and 4.057
UT with a 0.35-m reflector. The new object is located at R.A. = 23h52m13s.04
+/- 0s.01, Decl. = +47o23'42".5 +/- 0".1 (equinox 2000.0), which is
approximately 16".4 east and 1".1 south of the center of MCG +08-1-3. Nothing
is present at this position on Boles' images from 2009 Oct. 18 and Sept. 10
(limiting mag 19.5) or on Digitized Sky Survey plates from 1989 Sept. 28
(limiting red mag 20.5) and 1993 Aug. 21 (limiting blue mag 21.0).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 4 (CBET 2304) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:36

4 June 2010
IAU Electronic Telegram No.2305


APPARENT NOVA IN M31: M31N 2010-05a

Kamil Hornoch, Ondrejov Observatory, reports the discovery of an
apparent nova in the galaxy M31 by M. Wolf, P. Hornochova, and himself on
co-added 990-s and co-added 900-s R-band CCD frames taken with the 0.65-m
telescope at Ondrejov during May 28.035-28.062 UT; the new object is visible
on single images used for the co-added images, but is not present on
numerous archival images taken at Lelekovice and Ondrejov back to 2002.
M31N 2010-05a is located at R.A. = 0h42m35s.88 +/- 0s.03, Decl. =
+41o16'37".7 +/- 0".5 (equinox 2000.0), which is 95" west and 29" north of
the center of M31. Available R-band magnitudes for M31N 2010-05a from
various CCD images: 2010 Jan. 31.838, [21.2 (P. Kubanek, N. Morales, J. L.
Ortiz, J. Gorosabel, and M. Jelinek, 1.23-m telescope at Calar Alto); Feb.
25.745, [20.1 (Hornoch, 0.65-m telescope at Ondrejov); Mar. 17.763, [19.9
(Hornoch, Wolf. and P. Zasche, 0.65-m telescope at Ondrejov); May 28.035,
17.6 +/- 0.15 (Hornoch, Wolf, and Hornochova, 0.65-m telescope at Ondrejov);
28.049, 17.4 +/- 0.2 (Hornoch, Wolf and Hornochova); 28.062, 17.4 +/- 0.2
(Hornoch, Wolf and Hornochova); June 4.135, 17.11 +/- 0.07 (Morales, Ortiz,
Gorosabel, Kubanek, and Jelinek, 1.23-m telescope at Calar Alto).
Koichi Nishiyama, Kurume, Japan; and Fujio Kabashima, Miyaki, Japan,
report their independent discovery of M31N 2010-05a at mag 17.4 on seven
60-s unfiltered CCD frames (limiting magnitude 18.9), taken around June 3.784
UT using a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera). They
measure position end figures 35s.90, 37".9, and offset 95" west and 9" north
of the center of the galaxy M31. Nothing is visible at this position on
their frames taken on May 20.784 UT (limiting magnitude 19.0) and May 31.772
(limiting magnitude 18.8) or on Digitized Sky Survey red and infrared plates.
They note that a star is present within an arcsec of this position in Massey's
M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html), with
position end figures 35s.92, 37".2 and magnitudes V = 21.1, B = 22.1, R = 20.3.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 4 (CBET 2305) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:37

4 June 2010
IAU Electronic Telegram No.2306


SUPERNOVA 2010ds IN IC 4840

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, S. Silva, G.
Folatelli, R. Cartier, F. Forster, S. Marchi, and A. Leal, Universidad de
Chile; G. Pignata and M. Cifuentes, Universidad Andres Bello; B. Conuel,
Wesleyan University; and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D.
Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at
Chapel Hill, on behalf of the CHASE project, report the discovery of an
apparent supernova (mag approximately 16.4 +/- 0.3) on an unfiltered image
taken on May 22.34 UT with the 0.41-m 'PROMPT 3' telescope located at
Cerro Tololo. The new object, which is also present at mag approximately
17.0 in an image taken on June 4.08, is located at R.A. = 19h15m51s.46 +/-
0".1, Decl. = -56o12'30".9 +/- 0".1 (equinox 2000.0), which is about 1".7
west and 1".9 north of the center of the galaxy IC 4840. Nothing is
visible at this position on archival images taken on May 1.24 (limiting
mag 18.5) and Apr. 22.29 (limiting mag 18.0).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 4 (CBET 2306) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:37

5 June 2010
IAU Electronic Telegram No.2307


SUPERNOVA 2010dt IN PGC 58829

Filip Novoselnik, on behalf of the La Sagra Sky Survey (LSSS) supernova
search team (which includes also Denis Vida, Ivica Skoki, Robert Gregi,
Salvador Sanchez, Jaime Nomen, Reiner Stoss, Bill Yeung, Juan Rodriguez, and
Miguel Hurtado), reports the discovery of an apparent supernova (mag 18.6) on
two CCD images (limiting magnitude about 20.0) taken on June 1.986 and 1.9995
UT with a 0.45-m telescope. The new object is located at R.A. = 16h43m14s.68,
Decl. = +32d40'30".4 (equinox 2000.0), which is 21" east and 12" south of the
nucleus of the galaxy PGC 58829. Nothing is visible at this position on
a Digitized Sky Survey image from 1993 Apr. 28 (limiting red mag 22) or on
a Sloan Digital Sky Survey image from 2003 Mar. 7 (limiting infrared mag
22.3). J. Brimacombe, Cairns, Australia, reports that he found 2010dt at
mag 17.9 on six co-added 600-s unfiltered images taken remotely on June 5.15
with a 0.51-m telescope (+ STL11K camera) at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; his image has been posted at the
following website URL: http://www.flickr.com/photos/43846774@N02/4671462524/.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 5 (CBET 2307) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:38

6 June 2010
IAU Electronic Telegram No.2308


SUPERNOVA 2010du IN UGC 11170

Further to CBET 2301, S. B. Cenko, W. Li, and A. V. Filippenko,
University of California, report the LOSS discovery of an apparent supernova
on unfiltered KAIT images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010du May 25.48 18 13 58.75 +21 30 15.7 18.8 33".7 W, 20".1 S

Additional KAIT magnitudes for SN 2010du in UGC 11170: a co-added image
from 2009 Oct. 17 to 2010 May 5, [20.2; 2010 June 5.44, 18.6.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 June 6 (CBET 2308) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:38

8 June 2010
IAU Electronic Telegram No.2309


SUPERNOVA 2010dv IN NGC 3903

L. A. G. Monard, Pretoria, South Africa, reports his discovery of an
apparent supernova (mag 17.5 +/- 0.5) on unfiltered CCD images taken on
June 4.723, 5.695, 5.754, and 6.716 UT. The new object is located at R.A. =
11h49m03s.43, Decl. = -37d30'59".7 (equinox 2000.0), which is 2" west and 2"
north of the core of the galaxy NGC 3903. Nothing is seen at this position
in red Digitized Sky Survey images down to mag 20.5, on the previous image
of this galaxy taken at Monard's Bronberg Observatory on 2010 May 4.776
(limiting mag 19.0), or on earlier images from there.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 June 8 (CBET 2309) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:39

8 June 2010
IAU Electronic Telegram No.2310


SUPERNOVA 2010dw

Jure Skvarc reports the discovery of an apparent supernova on four
clear-filtered CCD images taken on June 5.94-5.99 UT with the 60-cm f/3.3
Cichocki reflector in the course of the Comet and Asteroid Search Program
(PIKA) at the Crni Vrh Observatory. The new object, which appears at
magnitude R = 17.3 on a confirming image taken by B. Mikuz on June 6.89
with the same telescope, is located at R.A. = 15h22m40s.31, Decl. =
-5o55'15".9 (equinox 2000.0), which is 4".5 east and 5".5 north of the
galaxy designated 2MASX J15224062-0555214. Nothing is visible at this
position on archival PIKA images obtained on 2006 Apr. 4.12 (limiting mag
18.0) or on a Palomar Sky Survey image from 1955 May 20. A CCD image taken
by S. Maticic with the same Crni Vrh telescope on June 7.89 yields R =
17.1 for 2010dw, as measured by Skvarc.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 8 (CBET 2310) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:39

9 June 2010
IAU Electronic Telegram No.2311


SUPERNOVAE 2010do, 2010dw, 2010dt

P. Challis, R. Foley, G. H. Marion, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics (CfA); and J. Ruel, Physics Department, Harvard
University, on behalf of the CfA Supernova Group, report on spectroscopic
observations that were obtained of 2010do, 2010dt, and 2010dw by P. Berlind
on June 7 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST;
range 360-760 nm) and of 2010do by R. J. Foley and J. Ruel on June 8 with the
Magellan telescope (+ IMACS; range 630-950 nm).
SN 2010do (cf. CBET 2301) is a type-Ic supernova near maximum light.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) finds
that the spectrum of 2010do is similar to that of SN 1994I at maximum light.
However, the presence of weak He I features cannot be ruled out. Using
4382 km/s as the heliocentric velocity for the host galaxy (Paturel et al.
2003, A.Ap. 412, 57), the velocity for Ca II is about 14000 km/s, measured
at the absorption minima of features from the H and K lines and the
infrared triplet. C II lines at 658.0 and 723.5 nm are measured at about
6000 km/s.
SNID indicates that 2010dw (cf. CBET 2310) is a normal type-Ia
supernova a few days before maximum light, and 2010dt (cf. CBET 2307) is a
normal type-Ia supernova near maximum light.

I. K. W. Kleiser, S. B. Cenko, J. M. Silverman, and A. V. Filippenko,
University of California, Berkeley, report that inspection of a CCD spectrum
(range 340-980 nm), obtained on June 8 UT with the 3-m Shane reflector (+
Kast) at Lick Observatory, shows that SN 2010do is a normal type-Ic supernova.
Cross-correlation with a library of supernova spectra using the SNID code of
Blondin and Tonry (2007, Ap.J. 666, 1024) indicates that 2010do is about two
days after maximum light.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:40

9 June 2010
IAU Electronic Telegram No.2312


NO SUPERNOVA 2010db

P. Challis, R. Foley, G. H. Marion, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics (CfA); and J. Ruel, Physics Department, Harvard
University, on behalf of the CfA Supernova Group, report on spectroscopic
observations that were obtained of 2010db (cf. CBET 2290) by P. Berlind on
June 7 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST; range
360-760 nm). The spectrum of 2010db appears to be that of an M-type star
with significant proper motion. The star was at R.A. = 18h26m12s.958,
Decl. = +30d14'26".34 (equinox 2000.0, FK5) in a red Digitized Sky Survey
(DSS) image from 1989 May 3, and at position end figures 11s.808, 21".05
in a DSS infrared image from 1995 Sept. 12. W. Brown, CfA, notes that this
star was designated LSR J1826+3014 = LSPM J1826+3014 when reported by Lepine
et al. (2002, Ap.J. 581, L47; 2005, A.J. 129, 1483) with magnitudes V = 19.4,
I = 14.4, and K = 10.8 and proper motion of 2.382 arcsec/yr.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 9 (CBET 2312) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:41

9 June 2010
IAU Electronic Telegram No.2313


SUPERNOVA 2010dd IN UGC 10594

D. Young, P. R. Dunstall, S. Valenti, and S. Smartt, Queens University;
and M. Sullivan and I. Hook, Astrophysics Department, Oxford University,
report that a spectrum of 2010dd (cf. CBET 2294) was obtained at the William
Herschel Telescope (+ ISIS; range 320-1000 nm) on June 8.98 UT, showing
2010dd to be a type-Ia supernova at two months after explosion. Cross-
correlation of the observed spectrum with a library of supernova spectra has
been performed with the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488,
383, available at website URL https://gelato.tng.iac.es/login.cgi). The
spectrum of 2010dd is similar to that of SN 2000fa (IAUC 7533) at 40 days
past maximum at a redshift of z = 0.03.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 9 (CBET 2313) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:41

9 June 2010
IAU Electronic Telegram No.2314


SUPERNOVA 2010dx IN NGC 7038

G. Pignata and M. Cifuentes, Universidad Andres Bello; J. Maza, M. Hamuy,
R. Antezana, L. Gonzalez, P. Gonzalez, S. Silva, G. Folatelli, R. Cartier, F.
Forster, and S. Marchi, Universidad de Chile; B. Conuel, Wesleyan University;
and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of
the CHASE project, report the discovery of an apparent supernova (mag
approximately 17.4 +/- 0.3) on an unfiltered image taken on June 8.17 UT with
the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo. The new object is
located at R.A. = 21h15m11s.09 +/- 0".1, Decl. = -47o13'34".3 +/- 0".1
(equinox 2000.0), which is about 36".4 east 20".2 south of the center of the
galaxy NGC 7038. Nothing is visible at this position on archival images
taken on May 10.34 and Apr. 28.30 (limiting mag 18.5). SN 2010dx is also
present in images taken on June 9.19 (at mag approximately 17.1) and June
1.28 (at mag approximately 17.0).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 9 (CBET 2314) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:41

10 June 2010
IAU Electronic Telegram No.2315


SUPERNOVA 2010cl IN MCG -02-25-20

N. Morrell and M. Phillips, on behalf of the Carnegie Supernova Project,
report that a spectrum (range 380-940 nm) of 2010cl (cf. CBET 2266) was
obtained on May 21.0 UT with the 6.5-m Magellan II Clay telescope (+ LDSS3)
at Las Campanas Observatory, which reveals that this is a type-II supernova.
Cross-correlation with a library of supernova spectra using the Supernova
Identification Tool of Blondin and Tonry (2007, Ap.J. 666, 1024) yields good
matches with a number of type-II-P events at 1 month or more after explosion,
with 2006bp at +34 days being the best comparison. A radial velocity of 2602
km/s is measured from narrow H II region emission at the position of the
supernova. The minimum of the H-alpha absorption is found to be blueshifted
with respect to this velocity by roughly 7400 km/s.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 10 (CBET 2315) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:42

10 June 2010
IAU Electronic Telegram No.2316


SUPERNOVA 2010do IN NGC 5374

D. D. Balam, Dominion Astrophysical Observatory, National Research
Council of Canada, reports that an image taken with the 1.82-m Plaskett
Telescope on June 8.25 UT shows SN 2010do (cf. CBETs 2301, 2311) to be
23".4 west and 1".2 south of the core of NGC 5374, conciding with a bright
knot in a spiral arm but noting that 2010do is several magnitudes brighter
than the knot. He provides the following photometry for 2010do
(differential from the star J135729.97+060804.8, with Sloan Digital Sky
Survey DR6 magnitudes converted to Kron-Cousins using the conversion
formulae of Chonis and Gaskell 2007, A.J. 135, 264): V = 16.69, B-V =
+0.28, V-R = +0.20.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 10 (CBET 2316) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:42

10 June 2010
IAU Electronic Telegram No.2317


SUPERNOVA 2010dy

S. Leonini, Siena, Italy, reports the discovery by S. Leonini and G.
Guerrini of an apparent supernova (mag about 17.9) on unfiltered CCD image
(limiting mag about 19.8) taken on 2010 June 6.947 UT during the Montarrenti
Observatory Supernovae Search program using a 0.53-m f/7.8 Ritchey-Chretien
telescope (+ Apogee Alta U47 CCD camera). Confirming images taken on June
9.847 and 9.888 show 2010dy at mag about 17.6. The new object is located at
R.A. = 16h10m11s.03, Decl. = +0d45'07".5 (equinox 2000.0), which is 9" east
and 5" south of the nucleus of the galaxy PGC 1174551. Nothing is visible at
this position in their numerous past images, including one taken on 2010 May
19.097 (limiting mag about 19.5), and 2010dy does not appear on Palomar Sky
Survey infrared, red, and blue plates (1984 July 17, F plate, limiting mag
20.3; 1987 May 3, J plate, limiting mag 20.3; 1991 June 15, N plate, limiting
mag 19.5). The discoverers have posted their discovery image at the following
website URL: http://www.jacopobaldi.it/dati/PSN%20in ... 174551.jpg.
Following posting on the Central Bureau's unconfirmed-objects webpage, D.
Milisavljevic and R. Fesen, Dartmouth College, report confirmation of 2010dy,
based on low-dispersion optical spectra (range 500-830 nm) obtained with the
2.4-m Hiltner telescope (+ CCDS) at MDM Observatory on June 10.3 UT.
Comparison with a library of supernova spectra using the "Supernova
Identification" tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows
that the spectrum of 2010dy closely matches that of the type-Ia supernova
2002bo around maximum light. The redshift z = 0.043 determined by SNID
agrees with the redshift of the nearby galaxy catalogued by the Sloan Digital
Sky Survey (SDSS J161010.57+004512.1).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 10 (CBET 2317) Daniel W. E. Green
Модератор Астрономического Форума ASTROTALK
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 06/2010

Сообщение Tikhon » 09 ноя 2010, 16:43

11 June 2010
IAU Electronic Telegram No.2318


SUPERNOVA 2010dz

J. Newton and T. Puckett reported the discovery of a possible supernova
(mag 18.1) on unfiltered CCD images (limiting mag 18.8) taken with a 0.40-m
reflector at Portal, AZ, U.S.A., on May 31.26 UT in the course of the
Puckett Observatory Supernova Search. The new object, which was confirmed at
mag 18.1 on images (limiting mag 18.9) taken by T. Orff on June 2.22 with a
0.40-m reflector at Portal, is located at R.A. = 13h50m44s.39, Decl. =
+17o03'58".5 (equinox 2000.0), which is 132" west and 47" north of the center
of UGC 8755. Nothing is visible at this position on images taken by Puckett
on 2010 May 20 (limiting mag 19.2) or in any images of this galaxy taken by
Puckett over the past ten years.
After posting on the Central Bureau's unconfirmed-objects webpage,
D. D. Balam, Dominion Astrophysical Observatory, National Research Council of
Canada, reports that he finds an object with magnitude V = 19.35, colors B-V
= 0.0 and V-R = +0.15, and position end figures 44s.42, 58".4 on CCD images
(limiting mag around 21.8) taken with the 1.82-m Plaskett Telescope on June
8.29 UT, adding that there is a very faint galaxy very close to that position,
which has magnitudes g = 22.0, r = 21.6, and i = 21.6 in the Sloan Digital Sky
Survey (position end figures 44s.29, 58".6, with Balam's independent
astrometry agreeing to within the measuring uncertainty), with 2010dz being
located 1".4 east of the very faint galaxy. Another faint galaxy (with g =
22.2, r = 21.4; SDSS J135044.39+170405.6) is located 7".1 due south of 2010dz.
Nothing is visible at the position of 2010dz on the SDSS images to a limiting
magnitude fainter than g = 22 (and perhaps near g = 23).

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

2010 June 11 (CBET 2318) Daniel W. E. Green
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