Update: I carried out photometry on CP Dra from Jan 1.994 to 2.071 (23.52 to 01.42UT). Data show a small hump of about 0.1 mag. Whether this is developing...
Darren Baskill (Leicester University) has requested observations of this star for the next couple of months or so (see VSSC No 124, June 2005 and 126 December...
R Tri is undergoing a bright maximum: 20 Jan 2006 1905GMT Equal C 5.8 12X50B Sequence used was RGA 1963 Mar (BAA VSS) where C = SAO55650 (= 5.82...
EnootnhoJ@...
Jan 21, 2006 4:22 pm
621
Nova/DN outburst confirmed 2006 Jan 21.779 UT V=12.58 +/- 0.02 Comparison TYC 5288 121 V=10.54 Position measured with Astrometrica/UCAC2: RA 02 33 21.398...
Hello. Coordinates and Photometry for ASAS 023322-1047.0 Precise astrometry of ASAS 023322-1047.0 done with CCD images taken by D. Rodriguez , with respect...
The RCB star V854 Cen is again in decline as shown by the following visual observations. The current event appears to have commenced earlier this month,...
Peter F Williams
pfwilliams@...
Jan 22, 2006 12:51 am
624
... And it was again caught by Patrick Wils! Cheers, Sebastian....
Another NSV 19448-like system?? And also in the Southern sky in the constellation Vela. NSV 18024 = HD 74771 is in outburst. Position: 08 44 34.05 -37 57 52.5...
... Possible dwarf nova (nova?) in Hya: ASAS 102522-1542.4 Grzegorz Pojmanski, Warsaw University Astronomical Observatory reports: ASAS3V instrument of The All...
What is the significance of the different colour dots that make up the lightcurve? Martin Nicholson, BSc BA FRAS Director - International Consortium of Robotic...
It's been four months since the start of the OJ287 observing campaign, so it's time for a short update. OJ has been in almost a constant bright state for the...
Message from Dr. Mark Kidger below. A light curve for the 1994 outburst sent by Mark as an attachment to this e-mail has been uploaded to the files section of...
Hi, Having just joined Gary's campaign, I am checking that my results are comparable with other contributors. My V,R data look fine but my CR (CCD unfiltered...
Robin, I reduce my unfiltered images using BAA chart V values. I see there is a recent CCD unfiltered obs at 14.5 whereas a couple of other observers are...
... No one asked me to do a calibration for OJ287. :-) I can add it to my program if desired. Richard gives you some good ideas. Remember also that not all...
Hi Robin, Because the CCD I have used so far has a response nearer to V than R I've used the V values when reducing my observations. I note these values have a...
Thanks Richard and everyone, I believe the discrepancy is now easily explained. My unfiltered figure is CR ie reduced using comp star R values in line with...
Hello Robin Do you still use a VESTA SC3 B+W QUICKCAM with the VC200L ? What kind of CCD chip does it use ? At which lambda does it have its max QE ? How good...
Hello Wolfgang, Yes it is still the SC3. I also now have Johnson V and R filters. Now I have good precision, I am going for good accuracy! The CCD is a sony...
Hello Robin You have a typo in the email. The max QE of the ICX424AL (also used in the SXV-H5) is not at 550 nm, but at 500 nm. So its for sure best to use V...
Thanks Wolfgang. I used an ensemble from the reference you quoted for my measurements. The combined B-V = 0.7 and V-R = 0.4 I am certainly not claiming that CR...
Michel, Is'nt this the star Nova Monoceros 1939? I had a look at Burnham's Celestial Handbook, this is classed as an (NA) type nova, catologued as magnitude...
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