=46or those interested in photometry of comets, Wolgan Renz has posted a list of resources on the AAVSO ist. Here is his post: ******************** =46rom: "Wolfgang Renz" <w_renz@xxxxxxxxxxxxx> Subject: [Aavso-photometry] Photometry and visual estimates of comets Date: Tue, 30 Oct 2007 18:11:56 -0700 I prepaped this post for an other group, but it might be interesting for you too. Visual estimates and CCD photometry on comets is more laborious and complex than with stars. It usually also results in much more noise in the data even with CCDs as the result usually severely depends on the used aperture size. See e.g.: Mark R. Kidger AMATEUR CCD PHOTOMETRY OF COMETS; HOW TO STANDARDISE DATA <http://www.astrosurf.com/comets/tecnicas/MACE_photometry_proceeding.htm> CCD Cometary Photometry; The Spanish Approach <http://www.astrosurf.com/comets/tecnicas/Photometry_archivos/frame.htm> and Ignacio Ferr=EDn Cometary photometry Infinite aperture magnitudes IAM Version 5.0 <http://webdelprofesor.ula.ve/ciencias/ferrin/teaching/curveofgrowth.pdf> =46or a short general intro see: ICQ - Brief Introduction to Comet Photometry http://www.cfa.harvard.edu/icq/cometphot.html ff =46or basic methods used for visual estimates see: ICQ - Visual Magnitude-Estimation Methods for Comets http://www.cfa.harvard.edu/icq/ICQMM.html 1992ASPC...33..123F Quantized Beyer's Method (QBM); to Estimate Accurately the Brightness of Extended Objects and Stars - Ferrin, Ignacio http://adsabs.harvard.edu/abs/1992ASPC...33..123F <http://webdelprofesor.ula.ve/ciencias/ferrin/ICARUSPAPER/QBMethod.pdf> Just take a look at the "official" ICQ keys for comet obs and you know what I mean with more laborious: ICQ - Keys to Codes used in Tabulated Observation Format http://www.cfa.harvard.edu/icq/ICQKeys.html ICQ - Recommended (and condemned) sources for stellar mags http://www.cfa.harvard.edu/icq/ICQRec.html ICQ - Observation Format for Data Contributed via E-mail http://www.cfa.harvard.edu/icq/ICQFormat.html =46or details on "classical" CCD photometry on comets see e.g.: ICQ - CCD Photometry of Comets http://www.cfa.harvard.edu/icq/CCDmags.html Herman Mikuz, Bojan Dintinjana - CCD Photometry of Comets http://astro.ago.uni-lj.si/comets/CCDPhot/iwca5.html ff http://www.fiz.uni-lj.si/astro/comets/CCDPhot/iwca5.html ff http://www.astrovid.com/technical_documents/Comet_Photometry.pdf =46or details on the advanced AfRho evaluation on comets see: CARA http://www.cara-project.org/ Measuring comets with the Afrho quantity http://www.cara-project.org/index.php?Itemid=3D28 Why to use optical filters http://www.cara-project.org/index.php?Itemid=3D38 http://www.cara-project.org/images/images/filtri.jpg CARA Procedures to perform AFrho measurements http://comete.uai.it/fotometria/CARA%20Procedure_eng.htm 1984AJ.....89..579A - Comet Bowell 1980b (original Afrho paper) Ahearn, M. F.; Schleicher, D. G.; Millis, R. L.; et al http://adsabs.harvard.edu/abs/1984AJ.....89..579A MACE (Meeting on Asteroids and Comets in Europe) http://www.minorplanets.org/ MACE 2006 http://www.astrometrica.at/MACE/ Sostero, G., Guido E. - Some thoughts about cometary CCD photometry http://www.astrometrica.at/MACE/abstracts.html#Sostero http://www.unet.univie.ac.at/~a0008654/mace2006/Sostero.ppt Afrho photometry software and papers: Unfortunatly the CARA site seems to have dropped most of the more advanced stuff including the WinAfRho and XAfRho down- load pages. http://perso.orange.fr/fkometes/pages/AfRho.html <http://babelfish.altavista.com/babelfish/trurl_pagecontent?lp=3Dfr_en&trurl= =3Dhttp%3a%2f%2fperso.orange.fr%2ffkometes%2fpages%2fAfRho.html> Laurent Jorda - La mesure du param=E8tre Af[Rho] http://perso.orange.fr/fkometes/pages/AfRho.html Laurent Jorda - Le parametre Af(Rho), traceur de l'activite cometaire http://perso.orange.fr/fkometes/documents%20pdf/ohp111204.pdf Laurent Jorda - Measuring the Af[Rho] parameter from radial profile http://perso.orange.fr/fkometes/documents%20pdf/afrho_v01.pdf Erik Bryssinck - komeetwaarnemingen CCD-fotometrie (AfRho, Winafrho) <http://www.eisystems.be/astronomy/presentatie_afrho_astrofotografie_2007033= 1_dia.pdf> [astro-ph-0608180] Photometry of comet 9P-Tempel 1 during the 2004-2005 approach and the Deep Impact module impact G. A. Milani, Gy. M. Szab=F3, G. Sostero, et al http://arxiv.org/abs/astro-ph/0608180 The Spanish Approach: Julio Castellano - FoCAs II (FOtometr=EDa Con Astrometrica) http://astrosurf.com/cometas-obs/_Articulos/Focas/Focas.htm (spanish) http://www.astrosurf.com/cometas-obs/_Articulos/Focas_i/Focas_ixxx.htm (Outdated english) =46oCAs: a software tool (the 10x10 multibox photometry method) http://www.astrosurf.com/cometas-obs/ArtSoftUtil/Focas/FocasIng.htm Clear skies Wolfgang -- Wolfgang Renz, Karlsruhe, Germany Rz.BAV =3D WRe.vsnet =3D RWG.AAVSO -- Jeff Hopkins HPO SOFT Counting Photons http://www.hposoft.com/Astro/astro.html Hopkins Phoenix Observatory 7812 West Clayton Drive Phoenix, Arizona 85033-2439 U.S.A. (623)849-5889 (623) 247-1190 (Fax) www.hposoft.com -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.