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Up on TOCP, discovery by Koichi Nishiyama, Kurume, Japan and Fujio Kabashima, Miyaki, Japan, mag 12.6 U:
Rob Kaufman KBJ
Bright, Vic, Australia
This star is located in a very reddened field. According to BRVI photometry of S. Kiyota the B-V=3.21.
My DSLR photometry showed this star at 13.71TG last nigt.
Checking my DSLR images of the Landolt SA110 field there was nothing visible at the given position down to 14.7TG on 5 July 2011.
PNV J18523496-0018423 2011 07 05.97 <14.7TG
PNV J18523496-0018423 2012 10 20.722 13.71TG
Has this one faded dramatically? I have nothing at that position down to mag 14.2 in an unfiltered RGB image tonight at 11:04, 21 Oct 2012 (21.461 Oct 2012).
Has this one faded dramatically? I have nothing at that position down to mag 14.2 in an unfiltered RGB image tonight at 11:04, 21 Oct 2012
I don't think so. It is just way too red: B-V=3.1! This is why this PNV is so faint in V or TG. The infiltered CCD images show this star much brighter since they are more sensitive in R and I band.
By what name/designation are we to report observations of this object? So far this morning WEBOBS will not accept any name variation I've tried to enter.
John, you can use PNV J18523496-0018423. Be sure to include the spaces as they appear here. The AUID is 000-BKS-398 if you prefer something shorter.
We try very hard never to announce a seqeunce as being available for a star you can't submit data on. If it needs an AUID we get one assigned ASAP.
Possible supernova in ngc3344 (R:10 43 34, D:24 53 29). This is a fairly nearby Gx and the SN may get bright. Light travel time = 0.040 Gyr according to NASA NED.
>>"This is a fairly nearby Gx and the SN may get bright."
I'm afraid it won't get brighter:
"A spectrum taken at Asiago shows it is a type Ib/c supernova about 130 days after maximum"
A new unconfirmed possible nova in Ser:
18 19 42.17 -14 42 35.7 10.8 U (24.7295UT Oct 2012)
Hopefully some follow-up data will be available soon:
SS Cyg looks like it's headed up. We may be able to help e-MERLIN trigger TOO radio wavelength observations if we can confirm; see Special Notice #279. Any observations of SS Cyg tonight would be appreciated. Please submit via WebObs *and* reply here if possible.
Observations taken tonight at JD 2456226.605 show continued and accelerating brightening. Data submitted to WebObs - B=10.57, V=10.23, R=10.01 and I=9.79
This type Ia SN was discovered ~1 week before it's possible maximum.
Further reference: CBET 3350
Still rising, lates observations show already around ~14.3CR.
I'll try to create an AAVSO sequence for this bright SN.
Calculating with 31.51 magnitude distant modulus of the host galaxy this SN can even reach ~12.2 magnitude at maximum...
Robert Fidrich (FRF)
It looks like a bona-fide nova because it has a SDSS counterpart around V= 22.3. Which makes an outburst amplitude of 11 mag.
I estimated the object to be 11.5 visual at 18:01 UT February 2, using comparison stars from the Tycho catalogue. Instrument: 20 cm Newton.
Does anyone have a tricolor image of nova cep 2013 and its environs? Something in the degree or larger regime would be nice. Otherwise, I'll see if I can get one from BSM-Berry.
I have a DSLR image with 300mm focus, but my images are quite greenish - maybe white balance issue with IRIS? V Cas, UV Cas, N Cep 2013 and NGC 7510 are visible on the images. The limit is around 14.0 mag.
It was overcast until 9PM, and by the time the sky became clear N Cep 2013 was quite low on the sky, where the light pollution of Budapest also made it worse. Probably a BSM/Berry image would be more beautiful, but it you want I can try to play with the white balance and or remove the light pollution from the image...
Played with the white balance. This one is a bit better:
If you want I can mark the nova + V Cas, UV Cas and NGC 7510 on this image too.
Thanks, Robert! That will do nicely as a placeholder; let me see how the BSM image turns out. In the meantime, if you can do the ID marking of the nova, NGC 7510, etc. as you offered, that will help a lot. I need this kind of an image to present in my upcoming talk at a local amateur club.
Nova Cephei 2013 (N), VSX J230915.4+605855 (SR) and the open cluster NGC 7510.
A wider FOV:
Nova Cep 2013 (N), V Cas (M), UV Cas (RCB), VSX J230915.4+605855 (SR) and the open cluster NGC 7510.
03/04 February 2013, Pesterzsébet, Budapest, Hungary.
Canon EOS 1000D, 300mm (zoom) telephoto lens, 12x30 stacked images.
The brightness of Nova Cep 2013 was around 11.5TG.
Observed RR Tau last night. This YSO/UXOR looks like its fading. Saw about 0.1 mag last night over several hours. Observations tonight might be interesting. Will cross post on YSO forum.
I think I observed it at v=14.6 last night, but there is a very close companion which makes visual estimation difficult. Rod Stubbings thought he saw a combined 13.8 there, but later said the variable was <14.4.
Could someone with a high resolution CCD please check this star?
MASTER OT J212444.87+321738.3 - new very bright variable in Cygnus
"MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 21h 24m 44.87s +32d 17m 38.3s on 2013-03-13.84134 UT. The OT unfiltered magnitude is 10.7m (limit 16.9m). The OT is seen in 6 images. There is no minor planet at this place. We have reference image with OT at 13.5m on 2012-10-21.52326 UT (magnitude limit 18.5m). The object is close to saturation on Mar. 13 images, so the real magnitude may be yet brighter."
More info: ATel #4888
Taking into account the very red colour of the star I assume this is a new mira variable. Another option: an RCB star brightening from a minimum?
Taichi Kato raises the question on vsnet-alert list:
"Wouldn't it be a nova like V407 Cyg?"
Anyway, a spectrum and prediscovery images would be useful...
Well, the star has not been listed in the possible RCB candidates in the catalogue of Tisserand (2011): Tracking down R Coronae Borealis stars from their mid-infrared WISE colours.
A B-band image taken last night at APASS-north, with the OT position marked, can be found at
There is no 10th magnitude object at the quoted position.
Further to my posting above, I looked at the Y-band (1micron) image from APASS. The MASTER variable is present, and quite bright:
This is a short exposure at a wavelength that CCDs are quite insensitive, so only the brightest objects show up. Nonetheless, this shows that the MASTER OT is an extremely red object (supported by the 2MASS and WISE observations), either some red star or something suffering considerable extinction. It is interesting just from that aspect. However, it also shows why unfiltered observations often give a false impression as to the brightness of a target. I'd be interested if any visual observer or V-band imager is able to measure this star.
When were these APASS images made? Isn't any image with V filter in APASS?
Aladin listed a 19th V magnitude object according to GSC2.3 - I wonder where this "V" magnitude in GSC2.3 came from...
Anyway it seems tonight will be clear in Hungary. I'll try to make some DSLR images with my 300mm (zoom) telephoto lens. Using 10-20x30s co-added images I can go down to ~14.5TG.
APASS is currently observing in B,V,g,r,i,z,Y. However, this particular observation was inserted into the queue very quickly, and I did not set up the observing plan properly. Only two images were taken: B and Y. We probably won't revisit the field with APASS. There is likely archival data for that field with deeper images that will be made available in DR7 or DR8.
The B,Y images were taken 2013-03-15 around 11:42UT.
Discovered by M. Sugano, Kakogawa, Hyogo-ken, Japan using 0.35-m f/11.0 Schmidt-Cassegrain + unfiltered CCD, which was confirmed on following ten frames taken during about one hour after discovery. Measurement has been done by K. Kadota, Ageo. Nothing is visible at this location on a frame taken on 2012 Dec. 10 UT (limit mag. wasn't reported).
I have the Mt. John 61cm set up to get a BV image pair centered on the SNe candidate. Those images should be taken in about an hour. I'll post a finding chart based on those images sometime today (DSLR workshop in progress).
Here is a V image of the field using OC61 (60sec) from about an hour ago; there is something at the SNe location, but not very bright; my guess is that it is about 17th mag.
This again shows why unfiltered magnitudes often are unreliable estimates of brightness. This SNe is reddened, and so is much brighter in the red than in a standard Johnson V bandpass. That is why my image shows the SNe around 17th magnitude, while initial reports were as bright as 15.6mag. As a TypeII, we won't be issuing an alert notice. It would be a fun object for which to get a tricolor image, as it will be red and in the dust lane of this pretty galaxy.
Hi all, Cbat's TOCP has a possible nova detected in Auriga. Details are here:
The 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.
I have also imaged the transient at 2137 UT this evening (April 3rd) with a DSLR unfiltered to confirm it's presence.
According to Denisenko et al (MASTER OT team) 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
Ran time series last night (130404 0013 UT to 0350). V Magnitude (VPhot ensemble) had slow decline from 12.35 to 12.45. Apparent period about 0.06 d. Amplitude about 0.05 p-p. Data on AID.