IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:20

6 November 2010
IAU Electronic Telegram No.2540


(15700) 1987 QD

R. Durkee, Shed of Science Observatory, Minneapolis, MN; P. Pravec, K.
Hornoch, and P. Kusnirak, Ondrejov Observatory; D. Pray, Carbuncle Hill
Observatory, W. Brookfield, MA, U.S.A.; V. Chiorny and V. Shevchenko, Kharkiv
Observatory; J. Oey, Leura, N.S.W., Australia; N. Gaftonyuk and Yu. Krugly,
Simeiz Observatory; D. Higgins, Canberra, Australia; J. Vilagi and S. Gajdos,
Modra Observatory; M. Husarik and M. Pikler, Skalnate Pleso Observatory; and
J. G. Ries, McDonald Observatory, University of Texas, report that photometric
observations obtained during Sept. 6-Oct. 13 reveal that minor planet (15700)
is a binary-system candidate. A primary rotation period of 3.0586 +/- 0.0001
hr with a lightcurve amplitude of 0.07 mag was resolved. Superimposed to the
primary lightcurve were attenuations with depths 0.1-0.3 mag and durations up
to 3.5 hours that had shapes characteristic of mutual events in a binary
system. A conclusive solution for the orbit period was not obtained, however,
so this object remains a serious suspect for being binary, but confirmation
must come from future observations.

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superseded by text appearing later in the printed IAU Circulars.

2010 November 6 (CBET 2540) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:21

7 November 2010
IAU Electronic Telegram No.2541


SUPERNOVA 2010jn IN NGC 2929

The Central Bureau has received reports of the independent discoveries of
an apparent supernova in NGC 2929 on unfiltered CCD images -- the first by T.
Boles (Coddenham, England, 0.35-m reflector), and the second by J. Newton and
T. Puckett (0.40-m reflector at Portal, AZ, U.S.A.). Boles reports the
position of 2010jn as R.A. = 9h37m30s.24, Decl. = +23o09'33".3, which is
approximately 5".9 east and 8".7 south of the center of NGC 2929; Puckett
provides position end figures 30s.20, 33".6 (offset 4".6 east and 8".5 south
of the center of NGC 2929). Available magnitudes, from unfiltered CCD images
unless noted otherwise: 1995 Nov. 30, [21.0 (Digitized Sky Survey, blue
plate; via Boles); 1998 Apr. 22, [20.5 (DSS, red plate; via Boles); 2009 Jan.
6, [19.5 (Boles); 2009 Oct. 4, [19.9 (Puckett); 2010 Oct. 21.160, 17.0 (Boles;
discovery); Nov. 5.47, 17.2 (Newton and Puckett; discovery); 6.48, 16.9
(Puckett). Boles subsequently noted that 2010jn was reported by Howell et
al. (see website URL http://www.astronomerstelegram.org/?read=2934), where
they reported position end figures 30s.30, 33".6 and the following R-band
magnitudes: Oct. 8.5, [20.3; 11.5, 19.6 (marginal); 12.5, 19.2 (discovery);
13.5, 18.7. Howell et al. add that a spectrogram obtained on Oct. 13 with
the "Gemini North" telescope showed 2010jn to be a type-Ia supernova around
15 days before maximum light, noting that the blueshift of the Si II 635.5-nm
feature indicates velocities in excess of 20000 km/s ("among the highest
ever seen for non-detached features" in a type-Ia event).

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

2010 November 7 (CBET 2541) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:28

7 November 2010
IAU Electronic Telegram No.2542


SUPERNOVA 2010jm

P. Challis and H. Marion, Harvard-Smithsonian Center for Astrophysics
(CfA), on behalf of the CfA Supernova Group, report that spectroscopic
observations (range 360-760 nm), obtained on Nov. 6 UT by M. Calkins with the
F. L. Whipple Observatory 1.5-m telescope (+ FAST), show that 2010jm (cf. CBET
2537) is a type-Ia supernova. Cross-correlation with a library of supernova
spectra using the "Supernova Identification" code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024) indicates that the best spectral match for 2010jm is
to the type-Ia supernova 1999aa at 1 day before peak brightness.

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 - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:28

11 November 2010
IAU Electronic Telegram No.2543


SUPERNOVA 2010jo IN UGC 595

M. Koishikawa, Sendai Astronomical Observatory, reports the discovery
of an apparent supernova (mag 17.5) on a 180-s R-band exposure (limiting mag
19.0) taken on Nov. 6.580 UT with a 1.3-m f/4.85 reflector. The new object,
which was found to be at mag 17.3 by Koishikawa on Nov. 6.608, is located at
R.A. = 0h57m35s.60 +/- 0s.03, Decl. = -1d23'33".0 +/- 0".5 (equinox 2000.0);
nothing was visible at this position on his image of UGC 595 taken the
previous night (Nov. 5.518; limiting mag 19.0). Koishikawa reports V = 17.4
on Nov. 10.562 for 2010jo. Koishikawa also reports that K. Itagaki obtained
unfiltered confirming CCD images of 2010jo on Nov. 6.608 with a 0.60-m f/5.7
reflector, yielding mag 17.3 and position end figures 35s.58, 33".4 (which
is offset 10" east and 6" south from the center of UGC 595). Itagaki's image
is posted at website URL http://k-itagaki.jp/images/psn-ugc595.jpg. After
posting on the Central Bureau's unconfirmed-objects webpage, C. Jacques and
E. Pimentel (Belo Horizonte, Brazil) write that they obtained a 120-s
unfiltered CCD image (limiting mag 17.8) on Nov. 7.02 remotely with a 43-cm
f/6.8 reflector at the Gras Observatory in Nerpio, Spain; from this, they
measured mag 16.8 and position end figures 35s.66, 33".6 -- adding that
nothing is visible at this position on a Digitized Sky Survey image from
1990 Aug. 28 (limiting red mag 19.0).

G. H. Marion, P. Challis, and S. Meyer Harvard-Smithsonian Center for
Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a
spectrum (range 340-740 nm) of 2010jo was obtained on Nov. 10 UT by P. Berlind
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation
with a library of supernova spectra using the "Supernova Identification" code
(SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that the object is a
type-Ia supernova near maximum light. The velocity of the Si II 635.5-nm
feature, measured at the absorption minimum, is 14200 km/s.

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

2010 November 11 (CBET 2543) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:29

13 November 2010
IAU Electronic Telegram No.2544


SUPERNOVAE 2010jp AND 2010jq

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S.
Silva, and F. Carrasco, Universidad de Chile; G. Pignata and M. Cifuentes,
Universidad Andres Bello; P. Gonzalez, Pontificia Universidad Catolica de
Chile; B. Conuel, Wesleyan University; G. Folatelli, IPMU, University of
Tokyo; 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 two apparent supernovae
on unfiltered images taken on Nov. 11.32 UT with the 0.41-m 'PROMPT 4'
telescope located at Cerro Tololo:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010jp Nov. 11.32 6 16 30.63 -21 24 36.3 17.2 --
2010jq Nov. 11.32 10 36 36.40 -27 28 44.5 17.2 18".6 E, 0".2 N

The uncertainty in the above positions is stated to be +/- 0".2 in each
coordinate. Additional approximate magnitudes for 2010jp, which is located
in the field of the merging galaxy IC 2163: Oct. 16.32, [18.5; 22.23,
[18.0; Nov. 12.14, 17.4. Additional approximate magnitudes for 2010jq:
Apr. 15.08, [18.5; May 13.00, [18.5; Nov. 12.30, 17.1.

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

2010 November 13 (CBET 2544) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:29

14 November 2010
IAU Electronic Telegram No.2545


SUPERNOVA 2010jr IN ESO 362-18

G. Pignata and M. Cifuentes, Universidad Andres Bello; J. Maza, M. Hamuy,
R. Antezana, L. Gonzalez, R. Cartier, F. Forster, and S. Silva, Universidad de
Chile; P. Gonzalez, Pontificia Universidad Catolica de Chile; B. Conuel,
Wesleyan University; G. Folatelli, IPMU, University of Tokyo; Petr Kubanek,
Universidad de Valencia; 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 16.2) on an unfiltered image taken on
Nov. 12.09 UT with the 0.41-m 'PROMPT 5' telescope located at Cerro Tololo.
The new object, which is also present at mag approximately 15.0 in an image
taken at Cerro Tololo with the CHASE 50-cm telescope on Nov. 13.11, is
located at R.A. = 5h19m34s.47 +/- 0".2, Decl. = -32o39'14".6 +/- 0".2
(equinox 2000.0), which is about 16".8 west and 13".6 north of the center of
the galaxy ESO 362-18. Nothing is visible at this position on archival
images taken with the "PROMPT 5" telescope on Nov. 6.27 (limiting mag 17.5)
and Oct. 23.22 (limiting mag 18.0).

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

2010 November 14 (CBET 2545) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:29

14 November 2010
IAU Electronic Telegram No.2546


SUPERNOVA 2010js IN UGC 4294

T. Boles, Coddenham, England, reports the discovery of an apparent
supernova (mag 18.1) on unfiltered CCD images taken on Nov. 7.075 UT with a
0.35-m reflector. The new object is located at R.A. = 8h16m49s.66, Decl. =
+60o29'46".1 (equinox 2000.0), which is approximately 2".6 east and 11".2
north of the center of UGC 4294. Boles also measured position end figures
49s.63, 45".8 and magnitude V = 18.3 on Nov. 9.544 using an image (limiting
mag 20.0) taken with the 0.61-m Cassegrain reflector at the Sierra Stars
Observatory (Alpine County, California). Nothing is present at this position
on Boles's images from 2010 Jan. 17 and Mar. 4 (limiting mag 19.5) or on
Digitized Sky Survey plates from 1989 Dec. 21 (limiting red mag 20.5) and
1990 Jan. 1 (limiting blue mag 21.0).

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

2010 November 14 (CBET 2546) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:29

14 November 2010
IAU Electronic Telegram No.2547


SUPERNOVA 2010jt

S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology;
R. H. McNaught and G. Garradd, Australian National University; J. L. Prieto,
Carnegie Observatories; M. Catelan, Pontificia Universidad Catolica de Chile;
E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the discovery of an
apparent supernova in Siding Spring Survey (SSS) images made public via the
"Catalina Real-time Transient Survey" program:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010jt Nov. 6.57 23 43 41.24 -41 18 46.9 19.0 20".5 E, 29".6 N

Further SSS magnitudes for 2010jt: Oct. 18.51 UT, [20.5 (co-added image);
Nov. 7.50, 19.0. The likely host galaxy, 6dFGS gJ234339.4-411917, has redshift
z = 0.053.

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

2010 November 14 (CBET 2547) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:30

15 November 2010
IAU Electronic Telegram No.2548


SUPERNOVAE 2010jp, 2010jr, AND 2010js

P. Challis and R. Kirshner, Harvard-Smithsonian Center for Astrophysics
(CfA); and N. Smith, University of Arizona, on behalf of the CfA Supernova
Group, report that spectroscopic observations (range 320-850 nm) of 2010jr
(cf. CBET 2545), obtained on Nov. 14.3 UT with the MMT (+ blue-channel
spectrograph), show a smooth and very blue continuum that resembles that
seen in spectra of SN 1993J from two weeks before maximum light. A spectrum
of 2010jp (cf. CBET 2544) shows the Balmer series lines of a type-IIn
supernova; broad red wings extend to +15000 km/s, with much sharper
absorptions on the blue side at approximately -3000 km/s, which resemble the
line profiles seen in spectra of SN 2006gy. A spectrum of 2010js (cf. CBET
2546) shows the symmetric Balmer lines with widths of approximately 4000
km/s (FWZI) seen in type-IIn supernovae; the redshift for this object in UGC
4294 is z = 0.039.

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

2010 November 15 (CBET 2548) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:30

16 November 2010
IAU Electronic Telegram No.2549


SUPERNOVAE 2010ju, 2010jv, AND 2010jw

Further to CBET 2510, S. B. Cenko, W. Li, and A. V. Filippenko report the
LOSS discovery of three apparent supernovae on unfiltered KAIT images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010ju Nov. 14.43 5 41 55.99 +18 29 51.0 16.8 6".8 E, 19".9 N
2010jv Nov. 14.48 7 27 26.48 +33 48 41.8 16.3 2".8 E, 0".3 N
2010jw Nov. 14.57 8 47 06.91 +28 14 17.4 17.5 0".1 W, 5".4 N

Additional KAIT magnitudes for 2010ju in UGC 3341: Oct. 13.55 UT, [18.7;
Nov. 15.41, 16.7. Additional KAIT magnitudes for 2010jv in NGC 2379: Apr.
10.15, [18.5; Nov. 15.49, 16.1. Additional KAIT magnitudes for 2010jw in IC
2394: Apr. 16.25, [18.6; Nov. 15.56, 17.5.

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

2010 November 16 (CBET 2549) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:30

16 November 2010
IAU Electronic Telegram No.2550


SUPERNOVAE 2010ju, 2010jv, AND 2010jw

R. Kirshner and P. Challis, Harvard-Smithsonian Center for Astrophysics
(CfA); and T. Matheson, National Optical Astronomical Observatory, on behalf
of the CfA Supernova Group, report on spectroscopic observations (range
320-850 nm) obtained on Nov. 16.3 UT with the MMT (+ blue-channel
spectrograph) of the three apparent supernovae announced on CBET 2549.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates
that 2010ju is a type-Ia supernova about one week before maximum light; the
velocity of the Si II minimum is blueshifted by about 16000 km/s in the
supernova's restframe. The spectrogram of 2010jv shows the spectrum of a
type-Ia supernova at maximum, with a blueshift of 11000 km/s at the Si II
line. The spectrogram of 2010jw has a spectrum that resembles the type-Ic
supernova 2004eu at five days past maximum light.

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

2010 November 16 (CBET 2550) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:31

17 November 2010
IAU Electronic Telegram No.2551


SUPERNOVAE 2010jx, 2010jy, 2010jz, 2010ka, 2010kb

A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams,
California Institute of Technology; T. A. Fatkhullin, V. N. Komarova, A. S.
Moskvitin, V. V. Sokolov, and T. N. Sokolova, Special Astrophysical
Observatory (SAO), Russian Academy of Sciences; J. L. Prieto, Carnegie
Observatories; M. Catelan, Pontificia Universidad Catolica de Chile; E. C.
Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the discovery of
five supernovae in unfiltered Catalina Sky Survey (CSS) images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010jx Oct. 28.19 1 19 42.22 +30 24 49.2 19.2 0".9 W, 0".7 N
2010jy Oct. 30.15 23 09 43.58 + 5 41 56.2 16.5 6".6 E, 1".6 S
2010jz Nov. 2.40 7 17 15.74 +45 23 03.7 18.0 4".5 W, 1".5 N
2010ka Nov. 7.35 3 26 01.99 - 0 49 48.0 19.4 0".6 W, 1".6 N
2010kb Nov. 10.43 8 20 47.41 +35 53 37.5 18.1 0".9 W, 0".7 N

Further CSS magnitudes of 2010jx: Oct. 9.30 UT, [20.3; 17.30, 19.0; Nov.
11.27, 19.9. Further CSS magnitudes of 2010jy: Sept. 10.37, [19.8; 30.28,
17.2; Nov. 12.24, 16.9. Further CSS magnitudes of 2010jz: Oct. 10.41,
[20.1; Nov. 11.36, 17.9. Further CSS magnitudes of 2010ka: Oct. 30.40,
[20.2; Nov. 16.30, 19.3. Further CSS magnitudes of 2010kb: Oct. 17.46,
[19.2; Oct. 31.50, 18.8.
The supernovae were spectroscopically confirmed with SAO's BTA 6-m
reflector (+ SCORPIO; range 380-790 nm) on Nov. 9 and 10. SN 2010kb
exhibits a steep blue continuum and narrow Balmer emission lines
characteristic of a type-IIn supernova at redshift z = 0.075. Cross-
correlation of the remaining objects with a library of supernova spectra using
the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) indicates the following best matches: 2010jx is a type-Ia supernova,
similar to SN 1995al at two weeks past maximum with redshift z = 0.11; 2010jy
is a type-IIn supernova, similar to SN 1998S at two weeks past maximum with
redshift z = 0.042; 2010jz is a type-Ia supernova, similar to 1995D just past
maximum at redshift z = 0.066; and 2010ka is a type-Ia supernova, similar to
2003du just past maximum at redshift z = 0.166.

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

2010 November 17 (CBET 2551) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:31

17 November 2010
IAU Electronic Telegram No.2552


SUPERNOVA 2010kc IN NGC 7624

Further to CBET 2549, S. B. Cenko, W. Li, and A. V. Filippenko report
the LOSS discovery of an apparent supernova on unfiltered KAIT images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010kc Nov. 15.18 23 20 22.33 +27 18 57.8 17.1 1".9 W, 1".9 N

Additional KAIT magnitudes for 2010kc: Oct. 17.24 UT, [18.2; Nov. 16.16, 17.2.
SN 2008ea (cf. CBET 1432) also appeared in NGC 7624.

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

2010 November 17 (CBET 2552) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:31

18 November 2010
IAU Electronic Telegram No.2553


SUPERNOVA 2010jq

G. Folatelli, IPMU, University of Tokyo; J. Anderson, Universidad
de Chile; and G. Pignata, Universidad Andres Bello, on behalf of the
Millennium Center for Supernova Science, report on an optical spectrogram
(range 355-896 nm) of 2010jq (cf. CBET 2544) obtained on Nov. 17.29 UT with
the SOAR telescope (+ Goodman HTS). The spectrum shows 2010jq to be an
evolved type-Ia supernova, between two and three months after maximum light.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024)
provides good matches with spectra of SN 2003du at +72 and +84 days.

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

2010 November 18 (CBET 2553) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:32

18 November 2010
IAU Electronic Telegram No.2554


BRIAN G. MARSDEN (1937-2010)

It is with deep regret that we must announce the death today
of Brian G. Marsden after a lengthy illness. He will be remembered
as contributing much to celestial mechanics and the dynamics and
orbits of minor bodies of the solar system and as having an encyclopedic
knowledge of the history of astronomy. He was a dedicated servant to
the astronomical community for many decades, serving as Director of the
Central Bureau from 1968 to 2000 (and as Director Emeritus since then)
and as Director of the Minor Planet Center from 1978 to 2006 (and as
Director Emeritus since then). He also served extensively within
Commissions 6 and 20 of the IAU over the years, being past President of
both Commissions. And he was one of the most visible astronomers in
the world over the years in terms of his generous availability to the
news media on behalf of the astronomical community.

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2010 November 18 (CBET 2554) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:32

23 November 2010
IAU Electronic Telegram No.2555


AX PERSEI

U. Munari and A. Siviero, Istituto Nazionale di Astrofisica, Padova
Astronomical Observatory; R. L. M. Corradi, Instituto de Astrofisica de
Canarias; and P. Valisa, G. Cherini, F. Castellani, and S. Dallaporta, "Asiago
Novae and Symbiotic Stars" (ANS) collaboration, report that the symbiotic star
AX Per is undergoing a brightening phase, the first after the short outburst
it experienced in the (northern-hemisphere) spring of 2009 (cf. CBET 1757).
The 2009 event was the first bright phase after the major outburst AX Per
experienced between 1988 and 1992 (cf. IAUCs 4544, 4621, 4922, 4994). The
monitoring carried out with several ANS-collaboration telescopes recorded AX
Per to be still in quiescence at B = 12.33 (B-V = +0.89, V-I_c = +2.79) on
2010 Nov. 15.93 UT. On Nov. 19.97, it had brightened to B = 11.73 (B-V =
+0.80, V-I_c = +2.53), and by Nov. 22.69 it has reached B = 11.63 (B-V =
+0.78, V-I_c = +2.47). Interestingly, the start of this new active phase is
occurring about 615 days past that of 2009, which is not too dissimilar from
the orbital period of the star (682 days). Absolute optical
spectrophotometry of AX Per was obtained with the 0.60-m telescope of the
Schiaparelli Observatory in Varese. The spectrum from Nov. 22 is
characterized by a strong and high-ionization emission-line spectrum,
superimposed on the M-giant absorption spectrum, which is veiled shortward
of 500 nm by the blue continuum from circumstellar nebular material. On
this spectrum, the integrated flux of H_beta emission is 1.2 x 10**(-11)
erg cm**(-2) s**(-1), and the flux ratios (H_beta):(H_alpha):(He II
468.6-nm):(He I 587.6-nm):([O III] 500.7-nm):([Fe VII] 608.7-nm):(O I
844.6-nm) are 1.00:5.18:0.47:0.22:0.19:0.0067:0.069; for comparison, on
August 7, during quiescence, they obtained exactly the same flux for H_beta
emission, but different line ratios 1.00:6.01:0.24:0.24:0.05:0.068:0.16. So
the onset of the current active phase has not changed the flux of Balmer and
He I lines, but increased He II by a factor of two and [O III] by three,
and reduced O I 844.6 by a factor of two and [Fe VII] by ten. It is worth
noting that AX Per underwent a short-duration flare about one year before
the onset of the major 1988-1992 outburst. It is tempting to speculate by
similarity that the 2009 short outburst could be a similar precursor, and
that the present rise in brightness by AX Per could be the onset of a major
outburst event similar to that in 1988-1992.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 November 23 (CBET 2555) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:32

27 November 2010
IAU Electronic Telegram No.2556


SUPERNOVA 2010kd

J. Vinko, University of Szeged; W. Zheng and A. Romadan, University of
Michigan; R. Quimby, California Institute of Technology; N. Whallon, S. B.
Pandey, Y. Fang, and C. Akerlof, University of Michigan; P. Pasque and M.
Verkinderen, Cousino High School; and J. C. Wheeler and E. Chatzopoulos,
University of Texas, on behalf of the ROTSE collaboration, report the discovery
of a new supernova (mag about 17.5) in unfiltered images taken on Nov. 14.49 UT
with the 0.45-m ROTSE-IIIb telescope at McDonald Observatory. The new object
-- which was observed again on Nov. 16.49 at mag about 17.4, on Nov. 18.48 at
mag about 17.4, and on Nov. 22.47 at mag about 17.5 -- is located at R.A. =
12h08m01s.11, Decl. = +49o13'31".1 (equinox 2000.0; uncertainty about 1"),
which is 2".1 east and 1".8 south of the center of the presumed host galaxy
(SDSS J120800.89+491332.8). Note that there is a fainter, uncatalogued
extended source about 2" southeast of the host galaxy that is also a possible
candidate to be the host galaxy of the new supernova. A finding chart for the
new object can be found at the following website URL:
http://www.rotse.net/rsvp/j120801.1+491 ... 491331.jpg. A spectrum,
obtained on Nov. 22.51 UT with the 9.2-m Hobby-Eberly Telescope (+ Marcario
Low-Resolution Spectrograph) by J. Caldwell, shows broad, weak P-Cyg features
superimposed on a blue continuum, consistent with an early type-II supernova.
If the strongest broad feature is due to H-alpha, then the redshift is z about
0.1, implying a peak absolute magnitude brighter than -20.5 (neglecting
interstellar extinction). According to SNID (Blondin and Tonry 2007, Ap.J.
666, 1024), the spectrum is similar to that of SN 1999gi at 5 days before
maximum light at a redshift consistent with the above estimate, but no
template matches all the observed features well. These suggest that the
supernova may be a peculiar, super-luminous event.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 November 27 (CBET 2556) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:33

27 November 2010
IAU Electronic Telegram No.2557


SUPERNOVA 2010ke

W. Zheng, University of Michigan; J. Vinko, University of Szeged; R.
Quimby, California Institute of Technology; A. Romadan, N. Whallon, S. B.
Pandey, F. Yuan, and C. Akerlof, University of Michigan; P. Pasque and M.
Verkinderen, Cousino High School; and J. C. Wheeler And E. Chatzopoulos,
University of Texas, on behalf of the ROTSE collaboration, report the
discovery of a new supernova (mag about 18.1) in unfiltered images taken on
Nov. 14.34 UT with the 0.45-m ROTSE-IIIb telescope at McDonald Observatory.
The new object -- which was observed again on Nov. 23.11 at mag about 18.0
and on Nov. 24.06 at mag about 18.2 -- is located at R.A. = 0h57m24s.62,
Decl. = -0o57'51".4 (equinox 2000.0; uncertainty about 1"), which is 0".2
east and 1".9 south of the center of the presumed host galaxy (SDSS
J005724.60-005749.5). A finding chart for the object can be found at
website URL http://www.rotse.net/rsvp/j005724.6-005 ... 005751.jpg.
A spectrum, obtained on Nov. 25.10 UT with the 9.2-m Hobby-Eberly Telescope
(+ Marcario Low-Resolution Spectrograph) by S. Odewahn, shows 2010ke to be a
type-Ia supernova at more than a week after maximum light. The spectrum
contains a strong Si II feature and several other broad lines of S II and Fe
II, characteristics of type-Ia supernovae. The best-matching template
spectrum in SNID (Blondin and Tonry 2007, ApJ. 666, 1024) is to the spectrum
of SN 1995E at 10 days after maximum. The redshift, estimated from broad
supernova features, is z = 0.042, consistent with the photo-z estimate of
the presumed host galaxy in the SDSS database. The expansion velocity at
the photosphere, derived from the absorption minimum of the Si II 635.5-nm
feature, is about 10000 km/s.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 November 27 (CBET 2557) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:33

30 November 2010
IAU Electronic Telegram No.2558


SUPERNOVA 2010kf

A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams,
California Institute of Technology; J. L. Prieto, Carnegie Observatories;
M. Catelan, Pontificia Universidad Catolica de Chile; E. C. Beshore and S. M.
Larson, Lunar and Planetary Laboratory, University of Arizona; and E.
Christensen, Gemini Observatory, report the Catalina Real-time Transient
Survey discovery of an apparent supernova in unfiltered Catalina Sky Survey
(CSS) images:

SN 2010 UT R.A. (2000.0) Decl. Mag. Offset
2010kf Nov. 28.33 03 36 03.53 +01 06 04.0 17.5 29".1 E, 12".8 S

Further CSS magnitudes for 2010kf: Nov. 6.39 UT, [20.0; Nov. 14.35, 17.9.
The presumed host galaxy, CGCG 391-014, has redshift z = 0.041.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 November 30 (CBET 2558) Daniel W. E. Green
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Re: IAU Circulars (IAUCs) - циркуляры МАС - 11/2010

Сообщение Tikhon » 07 дек 2010, 16:33

30 November 2010
IAU Electronic Telegram No.2559


NOVA IN M33: M33N 2010-11a

Jiangao Ruan, Fangchenggang, Guangxi, China; and Xing Gao, Urumqi,
Xinjiang, China, report the discovery of a possible nova (mag approximately
18.6) on several 60-s and 120-s survey images (limiting mag about 19.5) taken
by Xing Gao in the course of the Xingming Observatory Sky Survey around Nov.
27.5297 UT using an unfiltered CCD camera with a Celestron C14
Schmidt-Cassegrain telescope at Mt. Nanshan. The new object is located at
R.A. = 1h33m27s.55 +/- 0s.04, Decl. = +30d17'28".4 +/- 0".3 (equinox 2000.0).
Additional magnitudes from Gao and Ruan: 1989 Dec. 4, [20.8 (Digitized Sky
Survey, red plate); 2010 Nov. 25, [19.5; 26, [19.5; 27.835, 17.7; 28.527, 16.8.
Their images have been posted at http://www.xjltp.com/XOSS/XM10BH/XM10BH.htm.
The apparent nova was discovered independently by Koichi Nishiyama
(Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) at mag 16.7 on eight
40-s unfiltered CCD frames (limiting magnitude 19.4) taken around Nov.
28.542 UT with a Meade 200R 0.40-m f/9.8 reflector (+ SBIG STL1001E camera).
They measure M33N 2010-11a to be located at position end figures 27s.54,
28".4, which is 301" west and 1329" south from the center of the galaxy
M33. Additional magnitudes by Nishiyama and Kabashima for M33N 2010-11a:
1989 Dec. 4, [19.5 (DSS, infrared); 1991 Oct. 5, [19.4 (DSS, red);
2010 Nov. 24.551, [19.1; 26.520, [19.6; 29.629, 16.5.
Following a request from Kabashima and Nishiyama, T. Yusa, Osaki, Japan,
reports mag 16.1 and position end figures 27s.55, 28".5 for M33N 2010-11a
from unfiltered CCD frames (limiting mag 18.5) taken on Nov. 29.064 UT
remotely using a 0.25-m f/3.4 hyperbolic astrograph (+ SBIG ST-10XME camera)
at the RAS Observatory near Mayhill, NM, U.S.A. Yusa's image has been posted
at website URL http://space.geocities.jp/yusastar77/PNinM33_101129.htm.

NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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2010 November 30 (CBET 2559) Daniel W. E. Green
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