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Nova in Sagittarius = ASASSN-16ma = PNV J18205200-2822100

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發表於 2016-10-29 07:37:10 | 顯示全部樓層 |閱讀模式
[size=13.3333px]AAVSO Alert Notice 561

[size=13.3333px]October 28, 2016

[size=13.3333px]Nova in Sagittarius = ASASSN-16ma = PNV J18205200-2822100


[size=13.3333px]Event: Nova in Sagittarius

[size=13.3333px]Discovered by:
[size=13.3333px] - ASAS-SN (K. Z. Stanek (Ohio State University) et al.; ATel #9669)
[size=13.3333px] - Yukio Sakurai (Mito, Japan; via TOCP page)

[size=13.3333px]Discovery magnitude:
[size=13.3333px] - ASAS-SN: V~13.7, using quadruple 14-cm "Cassius" telescope at CTIO
[size=13.3333px] - Sakurai: 10.4 unfiltered CCD, using Nikon D7100 digital camera +
[size=13.3333px]180-mm f/2.8 lens

[size=13.3333px]Discovery date:
[size=13.3333px] - ASAS-SN: 2016 October 25.02 UT
[size=13.3333px] - Sakurai: 2016 October 26.380 UT
[size=13.3333px]  
[size=13.3333px]Coordinates (2000.0): R.A. 18 20 52.25  Dec. -28 22 12.1  (from VSX)
[size=13.3333px]
[size=13.3333px]Spectra: Spectroscopy indicating that ASASSN-16ma is a classical
[size=13.3333px]nova in the optically thick (Fe-curtain) stage was obtained 2016
[size=13.3333px]Oct. 27.5 UT by P. Luckas (International Centre for Radio Astronomy
[size=13.3333px]Research, Univ. of Western Australia; ARAS Group; ATel #9678).

[size=13.3333px]Observing recommendations: Observations of all types (visual, CCD,
[size=13.3333px]DSLR, spectroscopy) and all bands as instrumentation permits are
[size=13.3333px]strongly encouraged as the nova evolves.

[size=13.3333px]Observations reported to the AAVSO:
[size=13.3333px]2016 Oct. 20.04 UT, <17.3 V (ASAS-SN; Stanek et al., ATel #9669);
[size=13.3333px]23.398, <11.0 unfiltered CCD (Y. Sakurai, Mito, Japan; via TOCP page);
[size=13.3333px]25.02, 13.7: V +/-0.02 (ASAS-SN; Stanek et al., ATel #9669);
[size=13.3333px]26.02, 11.6: V +/-0.01 (ASAS-SN; Stanek et al., ATel #9669);
[size=13.3333px]26.05670, 11.76 B +/-0.07 (S. O'Connor, St. George, Bermuda);
[size=13.3333px]26.05750, 11.44 V +/-0.03 (O'Connor);
[size=13.3333px]26.05900, 11.44 CV +/-0.12 (O'Connor);
[size=13.3333px]26.48750, 11.0 (A. Pearce, Nedlands, W. Australia);
[size=13.3333px]27.0474, 11.04 B (S. Kiyota, Kamagaya, Japan; red color noted; with
[size=13.3333px]0.50-m f/4.5 CDK astrograph + FLI-PL11002M at Mayhill, NM, USA
[size=13.3333px]remotely; via TOCP page);
[size=13.3333px]27.0474, 10.65 V (Kiyota, as above; red color noted);
[size=13.3333px]27.0474, 10.18 Ic (Kiyota, as above; red color noted);
[size=13.3333px]27.48890, 10.6 (Pearce);
[size=13.3333px]27.50153, 10.4 (D. Benn, Klemzig, S. Australia);
[size=13.3333px]27.95490, 10.3 (A. Amorim, Florianopolis, Brazil);
[size=13.3333px]28.49387, 10.3 (Benn);
[size=13.3333px]28.71389, 10.3 (D. Blane, Henley-on-Klip, South Africa);

[size=13.3333px]Charts: Charts with a comparison star sequence for ASASSN-16ma may
[size=13.3333px]be created using the AAVSO Variable Star Plotter (VSP) at
[size=13.3333px]https://www.aavso.org/vsp[size=13.3333px]. Be sure to include the hyphen and no
[size=13.3333px]spaces in the name, as shown.

[size=13.3333px]Submit observations: Please submit observations to the AAVSO
[size=13.3333px]International Database using the name ASASSN-16ma. Once a GCVS name
[size=13.3333px]is announced in an IAU Circular or CBET, please use that name.

[size=13.3333px]Notes:
[size=13.3333px]a. Designated PNV J18205200-2822100 when posted to the IAU Central
[size=13.3333px]Bureau for Astronomical Telegrams Transient Object Confirmation
[size=13.3333px]Page (TOCP) at [size=13.3333px]http://www.cbat.eps.harvard.edu/unconf/tocp.html[size=13.3333px].
[size=13.3333px]Most of the information in this Alert Notice is taken from
[size=13.3333px]the TOCP page or ATel #9669
[size=13.3333px]([size=13.3333px]http://www.astronomerstelegram.org/?read=9669[size=13.3333px]), #9678, #9680, and
[size=13.3333px]#9683.

[size=13.3333px]b. Stanek et al. report no previous outbursts have been detected at
[size=13.3333px]the nova's location since ASAS-SN started observing the Galactic
[size=13.3333px]center in March 2016 (ATel #9669).

[size=13.3333px]c. Position end figures
[size=13.3333px] - ASAS-SN (discovery, 2016 Oct. 25.02 UT): 52.12s, 13.52"
[size=13.3333px] - Sakurai (discovery, 2016 Oct. 26.380 UT): 52.00s, 10.0"
[size=13.3333px] - P. Mroz et al. for OGLE (2016 Oct. 27 UT; ATel #9683): 52.25s,
[size=13.3333px]12.1"

[size=13.3333px]d. Progenitor: R. K. Saito (Universidade Federal de Santa
[size=13.3333px]Catarina) et al. (ATel #9680) report a likely progenitor candidate
[size=13.3333px]is VVV J182052.14-282212.8, located at position end figures 52.141s,
[size=13.3333px]12.79" (0.78 arcsec from the reported nova position). They also
[size=13.3333px]report that photometric flags in the VVV photometry
[size=13.3333px]([size=13.3333px]https://vvvsurvey.org[size=13.3333px]) as well as visual inspection of the images
[size=13.3333px]show the object may be a blend of two even fainter sources.

[size=13.3333px]However, P. Mroz (Warsaw University Observatory) et al., on behalf of
[size=13.3333px]the OGLE team, conclude that the VVV star cannot be the progenitor,
[size=13.3333px]as measurement of OGLE images taken 2016 October 27 UT show it is
[size=13.3333px]1.16 arcsec from the nova (ATel #9683). They also report the nova is
[size=13.3333px]not seen down to magnitude I=22 on the OGLE deep template image.


[size=13.3333px]Congratulations to the ASAS-SN team and to Yukio Sakurai on this
[size=13.3333px]discovery!


[size=13.3333px]This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.

[size=13.3333px]----------------------------------
[size=13.3333px]SUBMIT OBSERVATIONS TO THE AAVSO

[size=13.3333px]Information on submitting observations to the AAVSO may be found at:
[size=13.3333px]https://www.aavso.org/webobs

[size=13.3333px]ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION

[size=13.3333px]An Alert Notice archive is available at the following URL:
[size=13.3333px]https://www.aavso.org/alert-notice-archive

[size=13.3333px]Subscribing and Unsubscribing may be done at the following URL:
[size=13.3333px]https://www.aavso.org/observation-notification#alertnotices

[size=13.3333px]-------------------------------------------------
發表於 2016-11-9 08:36:28 從手機版本發送 | 顯示全部樓層
https://www.aavso.org/apps/webobs/results/?star=ASASSN-16ma
發表於 2016-11-9 08:37:33 從手機版本發送 | 顯示全部樓層
零度星系 發表於 2016-11-9 08:36
https://www.aavso.org/apps/webobs/results/?star=ASASSN-16ma

目视星等亮于6等了!
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