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CBAT "Transient Object Followup Reports"

PNV J17452791-2305213

PNV J17452791-2305213   2012 04 21.0123*  17 45 27.91 -23 05 21.3   9.6 C             Sgr       9 0

2012 04 21.0123

A possible nova in Sagittarius was discovered by Stanislav Korotkiy (Ka-Dar Obs.) and Kirill Sokolovsky (ASC Lebedev/SAI MSU) on tree images, obtained on 2012 Apr 21.01123UT with a wide-field survey camera (F=135mm f/2.0 telephoto lens and ST8300M unfiltered CCD, 30sec exposure time) at Ka-Dar Observatory's TAU Station, Nizhny Arkhyz, Russia (MPC COD C32). The object is clearly visible at magnitude 9.6 +/-0.3. The limiting magnitude of the images is ~14.0 (the scale is calibrated using V magnitudes of Tycho-2 stars in the field). Initial astrometry using nearby UCAC2 stars (RA, Dec, J2000): 17:45:28.03 -23:05:22.8 +/-1". The object is not visible on our previous images obtained on Apr 17.99UT (limiting mag. 14.0). The USNO-B1.0 catalog lists USNO-B1.0 0669-0621295 (magnitudes R1=16.21, B2=18.61, R2=18.65, I=16.62mag) just 0.6" away from the above position. The object could not be identified as a previously known one using MPChecker, AAVSO VSX and SIMBAD. Discovery images URL: http://www.astroalert.su/files/pnv_j17452791-2305213.jpg

2012 04 21.654

I can confirm there is a magnitude 8.8 object at the discovery position on a DSLR image taken with 50 mm f/1.0 lens. Image taken on April 21.654 UT by John Seach, NSW Australia.

2012 04 20.84

pre-discovery from Xingming observatory ,NET USNO-A2.0,C2012 04 20.84032, 17 45 28.02, -23 05 23.3, 10.2 V, C42

2012 4 22.3528

I took BVIc images of this nova candidate with 25cmRC+ST-10XME CCD(iTelescioope.NET T4) at Mayhill, NM, USA. Photometry results are:V=9.58, B=10.30, Ic=7.70. Position end figures are: R.A. 28.03, Dec. 22.89. Seiichiro Kiytota (Tsukuba, Japan)

2012 4 22.3528

Typo error: 25cmRC should be 25cm Reflector. My image is available at http://meineko.sakura.ne.jp/ccd/PNV_J17452791-2305213-120422.jpg

2012 04 22.4075

Following the posting on the Central Bureau's Transient Object Confirmation Page about a possible Nova in Sgr (TOCP Designation: J17452791-2305213) we performed some follow-up of this object remotely through 0.25-m f/3.4 reflector + CCD from MPC code H06 (Mayhill station, NM) On our images taken on April 22.4, 2012 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude 9.1 at coordinates: R.A. = 17 45 28.02, Decl.= -23 05 24.6 (equinox 2000.0; UCAC-3 catalogue reference stars). According to VIZIER there is a 16.21 R1-magnitude star at 1.261 arcseconds from the transient position (USNO-B1.0 0669-0621295). An animation showing a comparison between our confirmation image and the archive POSS2/UKSTU plate (R Filter - 1996): http://bit.ly/IIV8oN - Our confirmation image: - http://bit.ly/IwCYrb by Ernesto Guido, Nick Howes & Giovanni Sostero

2012 04 22.4146

L. Elenin (Lyubertsy, Russia) and I. Molotov (Moscow, Russia) confirm an apparent nova PNV J17452791-2305213. Object visible on 3x3sec images remotely taken at ISON-NM Observatory (Mayhill, NM, USA) with 0.45-m f/2.8 telescope + CCD (KAF09000) on Apr. 22.4146. Object located at 17h 45m 28s.02 +/- 0".1, -23d 05' 23".1 +/- 0".1 (NOMAD) and have magnitude about 9.0U (mag. limit ~17.8m). Nothing is visible at this position on the POSS and POSSII images. Image of PNV J17452791-2305213 available at http://spaceobs.org/images/TOCP/PNVJ17452791-2305213-20120422.png

2012 04 22.4535

Object clearly detected at coordinates 17 45 28.02 -23 05 22.9 (UCAC3). Magnitude 9.06 V +/- 0.10 . Limiting magnitude 15.3 . Observer: R. A. Koff, Bennett, Colorado USA (H09). Image posted at http://antelopehillsobservatory.org/SNpictures/PNVJ17452791-2305213final.jpg

2012 04 22.7181

Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan observe of possible nova in Sgr on two 3-s unfiltered CCD frames taken around 2012 Apr. 22.71814 UT ( limiting magnitude=17.6 ), using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera). Position is 17 45 28.05 -23 05 23.2 mag= 9.6 U the nearest star in USNO B1.0 catalogue 0669-0621295 has position end figures 28s007, 23."35, distance 0."6, magnitudes B2=16.21, R2=16.65, IR=16.62.

2012 04 22.4617

Markku Nissinen (Varkaus, Finland) report: I took confirmation images of suspected nova PNV J17452791-2305213 using remotely itelescope.net telescope 3, 15cm refractor, f/7.3, with color ccd. Observing site was Mayhill, NM, USA, Observatory code H06. Object was detected at magnitude 9.4 at position RA = 17 45 28.02 DEC = -23 05 23.0. GSC 1.1 (corrected) catalog positions. Confirmation image had 120s exposure time and the limiting magnitude was 17.2. There is no object brighter than 18 magnitude visible in DSS POSSII F (optical R) at object position within the error margins of the position measurement.

2012 04 22.9787

The object is clearly visible at magnitude 9.7 (the scale is calibrated using V magnitudes of Tycho-2 stars in the field). Tree images, obtained on 2012 Apr 22.9787UT with a wide-field survey camera (F=135mm f/2.0 telephoto lens and ST8300M unfiltered CCD, 30sec exposure time) at Ka-Dar Observatory's TAU Station, Nizhny Arkhyz, Russia (MPC COD C32). Stanislav Korotkiy (Ka-Dar Obs.) and Kirill Sokolovsky (ASC Lebedev/SAI MSU).

2012 04 21.9127

Swift observation of the nova candidate PNV J17452791-2305213 one day after discovery. ATel #4061; Kirill Sokolovsky (ASC Lebedev/SAI MSU), Stanislav Korotkiy (Ka-Dar Obs.), Leonid Elenin and Igor Molotov (ISON). URL: http://www.astronomerstelegram.org/?read=4061

2012 04 23.9761

The object is clearly visible at magnitude 10.0 (the scale is calibrated using V magnitudes of Tycho-2 stars in the field). Tree images, obtained on 2012 Apr 23.9761UT with a wide-field survey camera (F=135mm f/2.0 telephoto lens and ST8300M unfiltered CCD, 30sec exposure time) at Ka-Dar Observatory's TAU Station, Nizhny Arkhyz, Russia (MPC COD C32). Stanislav Korotkiy (Ka-Dar Obs.) and Kirill Sokolovsky (ASC Lebedev/SAI MSU). Object detected 2012 04 23.993UT at position end figures 28.03, 22.7 (UCAC2, J2000, accuracy of 0.3"). Magnitude 10.0U. Ka-Dar Observatory, TAU Station, Nizhny Arkhyz, Russia (MPC COD C32), telescope (D=400mm, F=3200mm) + STL-11000M + Clear, exp=60sec, bin=1x1, scale=0.6"/pix; S. Korotkiy, V. Gerke.

2012 04 24.9783

The object is clearly visible at magnitude 10.5 (the scale is calibrated using V magnitudes of Tycho-2 stars in the field). Tree images, obtained on 2012 Apr 24.9783UT with a wide-field survey camera (F=135mm f/2.0 telephoto lens and ST8300M unfiltered CCD, 30sec exposure time) at Ka-Dar Observatory's TAU Station, Nizhny Arkhyz, Russia (MPC COD C32); Stanislav Korotkiy (Ka-Dar Obs.) and Kirill Sokolovsky (ASC Lebedev/SAI MSU).

2012 04 25.9763

The object is clearly visible at magnitude 10.7 (the scale is calibrated using V magnitudes of Tycho-2 stars in the field). Tree images, obtained on 2012 Apr 25.9763UT with a wide-field survey camera (F=135mm f/2.0 telephoto lens and ST8300M unfiltered CCD, 30sec exposure time) at Ka-Dar Observatory's TAU Station, Nizhny Arkhyz, Russia (MPC COD C32); Stanislav Korotkiy (Ka-Dar Obs.) and Kirill Sokolovsky (ASC Lebedev/SAI MSU).