开云体育

SDSS J080846.19+313106.0 Apr 8.862 16.6CV Jeremy Shears

---------- Forwarded message ----- From: Yusuke Tampo <tampo@...> Date: Mon, 7 Apr 2025 at 09:14 Subject: [vsnet-alert 28055] TCP J08374922+0134065: new WZ Sge-type dwarf nova with large early superhump amplitude To: vsnet-alert@... <vsnet-alert@...>, vsnet-outburst@... <vsnet-outburst@...>, <vsnet-campaign-dn@...> TCP J08374922+0134065: new WZ Sge-type dwarf nova with large early superhump amplitude TCP J08374922+0134065 was discovered by Y. Nakamura on 3rd April at 14.7 mag. Based on the suggested counterpart (GALEX J083749.2+013407) with g=20.22(2) and the brightest ASAS-SN measurement with g~13.4 mag, the outburst amplitude is 6.8mag. http://www.cbat.eps.harvard.edu/unconf/followups/J08374922+0134065.html https://asas-sn.osu.edu/sky-patrol/coordinate/dce846f3-485d-4614-bace-a8b3e8e376e7 Itoh-san has reported the time-resolved observations on 6th April and the light curve shows a double-peaked modulation with a period of ~0.059 d and an amplitude of 0.2 mag with possible eclipses. Thus TCP J08374922+0134065 is a new WZ Sge-type dwarf nova with high inclination. Time-resolved observations are strongly encouraged. Best regards, Yusuke -- ---------------------------------------------- South African Astronomical Observatory, Postdoc fellow 反保 雄介 Yusuke TAMPO MAIL: tampo@... MAIL: yusuke@... ----------------------------------------------

SDSS J074640.62+173412.8 Apr 2.843 15.9 CV Jeremy Shears

SDSS J153634.42+332851.9 Apr 1.901 16.1 CV Jeremy Shears

Alert Notice - Observing Campaign #889 Photometry in support of TESS and Swift Observations of common-envelope post-novae April 1, 2025 The format of AAVSO Alert Notices has changed, both in the online Alert Notice itself and in what is distributed via email. To see the full content of the Alert Notice on V1280 Sco and V5856 Sgr, please go here: https://apps.aavso.org/v2/campaigns/889 Many thanks, and good observing, Elizabeth O. Waagen, AAVSO HQ

Alert Notice - Observing Campaign #891 V1159 Ori coverage needed to monitor for outburst to trigger radio observation April 1, 2025 The format of AAVSO Alert Notices has changed, both in the online Alert Notice itself and in what is distributed via email. To see the full content of the Alert Notice on V1159 Ori, please go here: https://apps.aavso.org/v2/campaigns/891 Many thanks, and good observing, Elizabeth O. Waagen, AAVSO HQ

UV Per in outburst… March 30.864. 12.4 visual Gary Sent from iPhone

I got SU UMa 12.9V using the Astronomical Society of Edinburgh's 0.3m scope in Spain last night. Super outburst beginning? Mark

Alert Notice - Observing Campaign #890 Nova in Sgr: V7993 Sgr = N Sgr 2025 No. 3 = TCP J18022164-3310319 March 26, 2025 The format of AAVSO Alert Notices has changed, both in the online Alert Notice itself and in what is distributed via email. To see the full content of the Alert Notice on V7993 Sgr = N Sgr 2025 No. 3 = TCP J18022164-3310319, please go here: https://apps.aavso.org/v2/campaigns/890 Many thanks, and good observing, Elizabeth O. Waagen, AAVSO HQ

---------- Forwarded message --------- From: Kirill Sokolovsky <kirx@...> Date: Tue, 25 Mar 2025 at 23:21 Subject: [vsnet-alert 28053] outburst of LINEAR 23795703 - a CV of uncertain type in UMa To: <vsnet-alert@...> The object LINEAR 23795703 = Gaia DR3 861540207303947776 = P_2.74a is listed as EW with the range 16.41 - 16.94 CV in the VSX https://www.aavso.org/vsx/index.php?view=detail.top&oid=322585 However, El-Badry et al. (2021) https://ui.adsabs.harvard.edu/abs/2021MNRAS.508.4106E/abstract identified it as an eclipsing cataclysmic variable (their object P_2.74a) that showed an outburst in 2015 according to ASAS-SN. El-Badry et al also present a spectrum and radial velocity curve. LINEAR 23795703 was found in outburst again on 2025-03-25.8886 UTC having CV=14.0 +/-0.1 in NMW survey images (135mm f/2.0 telephoto lens + unfiltered ST-8300M CCD). Best wishes, Kirill Sokolovsky for the NMW team

V452 Cas Mar 24.822 16.1CV Jeremy Shears

The Winchester weekend is soon upon us (April 11 to 13). I shall take the VSS display boards along as usual. If anyone attending the weekend has any material to display, please bring it along with you. A4 printouts work best. Space limited - first come first served. Go well! Jeremy

CP Dra Mar 14.894 14.5CV

I've received an email from Tom Calderwood, who is head of the AAVSO PEP section, saying that he has an Optec photometer available for use on bright stars, which could be used by a UK observer. Tom says "a prospective observer needs either a cassegrain scope of at least 8 inches apertureor a relatively short-tube refractor of at least 5 inches, equatorially mounted and preferably with GOTO. I can discuss other more specific points with interested individuals". If anyone is interested please contact me personally, not through the alert group, and I'll put you in touch with Tom. Gary -- ------------------------------------------------------ Gary Poyner FRAS garypoyner@... www.variablestars.co.uk

---------- Forwarded message --------- From: Calculad Kev <calculadkev@...> Date: Sun, Mar 2, 2025 at 11:01 AM Subject: SU Tau fade To: <[email protected]> SU TAU 2025 Mar. 01.79775 14.033 0.027 B 13.455 SU TAU 2025 Mar. 01.79021 12.649 0.028 V 12.527 SU TAU 2025 Mar. 01.85867 12.650 0.017 V 12.540 SU TAU 2025 Mar. 01.85289 14.067 0.023 B 13.477 Last columns is checks. Sky deteriorated for second obs although errors improved? Can somebody let me know if this is the correct way to post on here and if it's working. Thanks Kevin Kevin

Never posted on here before. Hope it works. Last night 2025 02 28, transformed V and B. It's going SU TAU 2025 Feb. 27.83466 13.459 0.022 B 13.462 SU TAU 2025 Feb. 27.83440 12.143 0.023 V 12.521 SU TAU 2025 Feb. 28.85872 13.792 0.024 B 13.456 SU TAU 2025 Feb. 28.85527 12.423 0.026 V 12.522 Kevin Kevin West

The March edition of the BAA Variable Star Section Circular has been published and can be downloaded here: https://britastro.org/vss/VSSC203.pdf I do hope you enjoy reading the articles. Many thanks, as ever, to all our authors and to our Editor, Gary Poyner. Note the announcement about our Section meeting on Saturday October 25, at Northampton. If you would like to speak at the meeting, drop me an email. Please do consider writing something for our next circular. Please send contributions to Gary. Clear skies! Jeremy Shears Director, VSS

SDSS J112003.40+663632.4 Feb 28.895 15.9C Jeremy Shears

SU Tau could be in the early stage of a fade: 6th Feb: 10.4mv 17th Feb: 10.6mv 18th Feb: 10.7mv 20th Feb: 10.9mv John Toone

V452 Cas Feb 20.808 16.2C Jeremy Shears