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transient

Special Notice #398: Bright Transient in Sgr (PNV J18142514-2554343)

February 13, 20115:  Patrick Schmeer (SPK, Bischmisheim, Germany) reports the announcement on the CBAT Transient Object Confirmation Page (TOCP) of the discovery of a bright transient in Sgr on 2015 February 12.852 at an unfiltered magnitude of 10.9 by K. Nishiyama, using a 105-mm f/4 camera lens with an SBIG STL6303E CCD camera.  Nishiyama notes nothing is present on a previous image from 2015 February 02.887.  The transient has been independently confirmed with two pre-discovery images: by H.

Special Notice #397: Bright Transient in Sco (PNV J17032620-3504140)

February 11, 2015: Patrick Schmeer (SPK, Bischmisheim, Germany) reports the announcement on the CBAT Transient Object Confirmation Page (TOCP) of the discovery of a bright transient in Sco on 2015 February 11.8367 UT at unfiltered CCD magnitude 8.2 by Tadashi Kojima (Gunma-ken, Japan) using a 150-mm f/2.8 lens + a digital camera. Kojima reports nothing is visible on a frame from the same camera on Feb. 10.827 UT.

Special Notice #208: Optical transient in Pegasus

May 8, 2010: CBET 2273 (D.W.E. Green, editor) reports the discovery of a bright transient in Pegasus by Dae-Am Yi (Yeongwol-kun, Gangwon-do, Korea). The object was discovered at magnitude 10.8 on 2010 May 6.77 (JD 2455323.27) on an image taken with a Canon 5D + 93-mm camera lens. The object brightened to magnitude 8.4 as observed on 2010 May 7.76 (2455324.26) on an image taken with a 400-mm lens. The transient object appears to be concident with GSC 2197:886 on discovery images, but this identification is not yet proven.

Special Notice #368: Bright transient in M74 - PSN J01364816+1545310

July 26, 2013:  Patrick Schmeer (SPK, Bischmischeim, Germany) reports via baavss-alert and vsnet-alert that a bright (12.4 U) transient, discovered in M74 (NGC 628) on 2013 July 25.80 UT, has been announced on the CBAT Transient Objects Confirmation Page. The discover's name does not appear there. The presence of the transient has been confirmed by Andrzej Pigulski on 2013 July 27 0:00 UT in vsnet-alert 16057.

AAVSO Special Notice #260: Retraction of Special Notice 259

October 19, 2011: Further to AAVSO Special Notice #259, D. Fox notes in ATel #3692 that the bright transient in the M31 region reported by Ovcharov et al (ATel #3691) is coincident with the current position of minor planet Palma, currently transiting M31 at a magnitude of V=11.3. The object noted in Special Notice #259 is therefore unlikely to be stellar in nature. Special Notice #259 is therefore retracted.

This AAVSO Special Notice was prepared by M. Templeton.

AAVSO Special Notice #259: Possible bright transient in the region of M31

October 19, 2011: Ovcharov et al. announced the detection of a bright transient in the region of M31 in ATEL #3691 (2011 October 19).  They detected an object at R=10.95 on 2011 October 19.818. We are aware of no other confirming observations.

The object is at the following (J2000) coordinates:

RA: 00 44 55.27  Dec: +41 30 58.5

We note that this object is coincident with the blue source LGGS J004455.24+413059.7. Both visual and instrumental follow-up observations are strongly encouraged.

Special Notice #251: Possible transient in Scorpius

September 6, 2011: John Seach (Chatsworth Island, NSW, Australia) reports the detection of a transient object in Scorpius, having a magnitude of 9.8 on 2011 September 6.37 UT (JD 2455810.87).  Observations were made with a DSLR and 50mm f/1.2 lens and 5 second exposure, with limiting magnitude 10.5.  The object is visible on four separate frames taken after the discovery was made.  No object appears at the location of the transient on an image taken 2011 September 5.36 UT.
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