Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

PNV J06270375+3952504

PNV J06270375+3952504   2013 04 03.4450*  06 27 03.75 +39 52 50.4  12.0 U             Aur       0 0


2013 04 03.445

Discovered by S. Kaneko, Shizuoka-ken, Japan, on two frames (limiting mag = 14.5) with 10-s exposure using Canon Digital Camera + 200-mm f/2.8 lens, who writes this star is not visible on two frames taken on 2012 Sept. 9 and 2013 Mar. 23 UT.



2013 04 03.833

New object at coordinates 06 27 03.80 +39 52 49.4 (J2000.0) is confirmed by CCD images taken at Hankasalmi Observatory by A. Oksanen. Magnitude V=11.8 using close GSC 2931-0438 with V=10.9 as the magnitude reference. Image: http://murtoinen.dyndns.org/ccd/ccd/NovaAur2013/NovaAur2013_20130403.jpg



2013 03 31.784

D. Denisenko, E. Gorbovskoy and V. Lipunov (SAI MSU) report on behalf of the larger MASTER team: nothing is visible at the position of PNV J06270375+3952504 on MASTER-Kislovodsk unfiltered survey images obtained on 2013 Mar. 31.752 UT and Mar. 31.784 UT to the limiting magnitude 19.4. The new object is an outburst of the blue star USNO-B1.0 1298-0172862 (06 27 03.705 +39 52 49.16 pmRA=0 pmDE=0 B1=20.71 B2=20.31), most likely a new variable of UGWZ (WZ Sge) type. Color-combined DSS finder chart (5'x5' FOV at 200% zoom) is uploaded to http://master.sai.msu.ru/static/OT/J062703+395250-BRIR5x5.jpg



2013 04 03.848

MASTER team also reports unfiltered magnitudes from 60-sec exposures by double MASTER-Kislovodsk telescope (0.40-m f/2.5 reflector + 4Kx4K CCD): 2013 Apr. 03.848 UT, 12.01; 03.850 UT, 12.00. Position end figures (average of 6 measurements): 03s.82, 49".0. MASTER-Kislovodsk confirmation (Apr. 03) and reference (Mar. 31) images: http://master.sai.msu.ru/static/OT/J062703+395250-MASTER.jpg



2013 04 03.8467

We performed some follow-up of this object through a 0.25-m f/4 reflector + CCD from MPC Code C77 (Bernezzo Observatory, Italy). On our images taken on April 03.8, 2013 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude 12.3 at coordinates: R.A. = 06 27 03.77, Decl.= +39 52 48.8 (equinox 2000.0; UCAC-3 catalogue reference stars). Observers: Andrea Mantero, Ernesto Guido, A. Ruocco, Nick Howes.



2013 04 03.84147

The object is clearly visible on 55x30sec frames at 06:27:03.72 +39:52:49.1 (+/-1", J2000)having an unfiltered magnitude of 11.7 (calibrated against UCAC2). No variability greater than 0.15m is visible between individual frames spanning a 40 minute-long interval. The images were obtained starting on 2013 04 03.84147 UT with a wide-field survey camera (F=135mm f/2.0 lens + ST8300M CCD) operated by Ka-Dar Observatory at Karachay-Cherkessia, Russia. The finding chart is available here: http://www.astroalert.su/files/novaaur2013_2013-4-3_20-12-9ut.jpg (52'x 50', North is up, East is to the left). S. A. Korotkiy (Ka-Dar), K. V. Sokolovsky (ASC Lebedev/SAI MSU)



2013 04 04.1050

PNV detected at position 06 27 03.76 +39 52 48.65 (UCAC3). Magnitude 12.24 U +/- 0.01 (UCAC3). Limiting magnitude 17.2 . Average of 10 separate 30-second images. Observer: R. A. Koff, Antelope Hills Observatory, Bennett, Colorado USA (H09). Image posted at: http://antelopehillsobservatory.org/SNpictures/PNVJ06270375+3952504final.jpg Recorded 2.3 hour time series. Evidence of periodicity. Lightcurve posted at: http://antelopehillsobservatory.org/SNpictures/PNVJ06270375+3952504LC.jpg



2013 04 03.833

A. Oksanen (Hankasalmi observatory) reports V band time series observation from April 3, 2013 20:00 to April 4, 2013 01:30 UTC. The light curve shows low amplitude (0.05 mag min-max) periodic (85 minutes) variation over fading trend. Lightcurve: http://murtoinen.dyndns.org/ccd/ccd/NovaAur2013/PNVJ06270375_20130403V.png



2013 04 4.27

A 3ks Swift observation of PNV J06270375+3952504 was performed on April 4.27 UT resulting in detection of a new X-ray source at the optical transient position. The Swift/XRT net count rate is 0.015+/-0.003 cts. The spectrum is consistent with kT = 3 keV thermal bremsstrahlung (integrated 0.2-10 keV flux of 4.5x10^-13 ergs/cm^2/s) with no absorption, however the number of collected photons is insufficient for a detailed spectral analysis. A bright ultraviolet counterpart of the flaring source is detected by Swift/UVOT having M2=10.55+/-0.05 (Vega system). Overall, the object might resemble a fainter version of GW Lib, another WZ Sge-type flare observed by Swift (Byckling et al. 2009, MNRAS, 399, 1576). ATel #4954 http://www.astronomerstelegram.org/?read=4954 (K. Sokolovsky, S. Korotkiy)



2013 04 08.14553

Photometry: 13.3 B, 13.2 V, 13.4 R; Astrometry: RA 06 27 03.77 Decl +39 52 48.6 (UCAC-4), remotely using an iTelescope 0.25-m f/3.4 hyperbolic astrograph + CCD (SBIG ST-10XME) at Mayhill, NM, U.S.A. (H06). Observer T. Yusa, Osaki, Japan. Link to BVR color composite image : http://space.geocities.jp/yusastar77/supernova/PNinAur_130408.htm


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