Skip to main content

U Gem beginning outburst

13 posts / 0 new
Last post
lmk
lmk's picture
U Gem beginning outburst

Just observed it visually at 12.8 on 02/21 11:01 UT.

Mike LMK

 

PYG
PYG's picture
U Gem

Mike,

I sent your outburst observation, and your previous quiescent observation made the night before to BAA alert group and CVnet.

Gary

mgw
mgw's picture
U Gem at 13.7 at 07:29 oin February 21 - possible outburst

U Gem was at 13.7 last night at 07:29 on February 21

slh
u gem outburst

I had it at <14.1 on 02/21 00/29 UT.

Larry SLH

weo
weo's picture
U GEM NEEDS OBSERVATIONS NOW

U Gem appears to be going into outburst, according to observations from Mike Linnolt, Rod Stubbings, and Gordon Myers. Further observations are essential to confirm that the outburst is underway in order for PI Deanne Coppejans to decide whether to trigger radio observations. Please submit your observations to the AAVSO via WebObs immediately and send email to Deanne Coppejans, Dr. Matthew Templeton, and Elizabeth Waagen (d.coppejans@astro.ru.nl, matthewt@aavso.org, eowaagen@aavso.org).

Good observing, Elizabeth Waagen

 

umairasim
umairasim's picture
U GEM from Pakistan

 
  It is 12.5 a few minutes ago from Lahore, Pakistan (31.28, 74.22) 04:00 GMT. Taking more data right now.

Tonisee
U Gem bright

I can confirm (based on raw data) that U Gem is in V between 12.2 and 12.3.

Shooting a series now.

Best wishes,

Tõnis

hambsch
hambsch's picture
U Gem approx mag 9.5

Hi,

I measured U Gem approx mag 9.5 last night. Images are probably saturated, so magnitude maybe not perfectly correct.

Josch (HMB)

umairasim
umairasim's picture
Longitude 31 is clouded

 

 I had a chance to observe for a few hours when it all started but since then clouds have grounded me. Forecasted chance for me is on Wednesday. Fingers crossed!

 Umair Asim

 Lahore, Pakistan.

 31.28, 74.22

cpmalo87
cpmalo87's picture
Clouds and ice in Arkansas...

 

My 'scope power supply is charged and ready, but like Umair, I won't be able to observe until at least Wednesday night when the snow showers stop and we get a break in the clouds.  It has been cloudy since the ouburst began. Very disappointing. Perhaps I'll get in a few estimates on the downslope!

Chris

 

BPO
BPO's picture
U Gem

I think U Gem peaked out at 9.3 in V.  I managed to get data both sides of the peak too in V and B. JD2457076.28600 - 2457076.30600

Douglas

 

FMT
FMT's picture
U Gem spectroscopy

On this topioc of Aras Forum,

http://www.spectro-aras.com/forum/viewtopic.php?f=5&t=1076&p=4879#p4879

one can see the spectrum of U Gem during the rise, with especially absorptions of Balmer lines

and in the second spectrum, near maximum luminosity the weak emission of H alpha and complex features of other Balmer lines

See the double peak of H alpha line (v sin i = 1000 km/s) from the accretion disk

 

François Teyssier
TFM

MGQ
Are Sloan G,R,I measures needed?

Sorry for the question, but i measured it in 2014 12 09 with mag close to 13,86. only now im ready to do photometry but with sloan filters.

Are they welcomed?

thank for the spectrometry on the object!

JAC

 

Log in to post comments
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484