BBSAG BULLETIN. March 15 th, LIST OF MINIMA OF ECLIPSING BINARIES

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1 BBSAG BULLETIN 124 March 15 th, LIST OF MINIMA OF ECLIPSING BINARIES The following table lists 145 electronically recorded (CCD; underlined) and 154 visual timings of minima of eclipsing binaries obtained primarily between October 2000 and February 2001 by the following observers: EBl RD PG BK KL APs KT JVe Ernst Blaettler, Wald, Switzerland, Roger Diethelm, R. Szafraniec Observatory, Metzerlen, Switzerland, Peter Guilbault, Chepachet, R.I., USA, Bruce Krobusek, Farmington, N.Y., USA Kurt Locher, Grüt, Switzerland, Anton Paschke, Rüti, Switzerland, Kari A. Tikkanen, Oulu, Finland, Jean-Paul Verrot, Valence, France, The O-C values given in the table below generally refer to the linear elements of the GCVS 1985, with the remarked exceptions. For the determinaton of the time of the minima, the tracing paper method was employed. For the reduction of some of the electronic observations, software based on the Kwee-van Woerden algorithm was used. All times are UTC. The complete set of BBSAG Bulletins is now available in the PDF-format at

2 UU And p KL p RD CCD XZ And p KL AP And p JVe elem. GEOS Circ. EB p JVe s JVe p JVe s JVe p JVe CP And p RD CCD DS And p APs CCD EP And p KL V404 And p RD CCD; elem. IBVS No CZ Aqr p KL GK Aqr s KL elem. Per. Zv. 22, TX Ari p JVe p JVe RY Aur p KL RZ Aur p KL ZZ Aur p RD CCD CL Aur p KL EI Aur p RD CCD EM Aur p RD CCD HS Aur p RD CCD HW Aur p RD CCD; elem. IBVS No s RD CCD IZ Aur p RD CCD; elem. IBVS No KU Aur p KL MT Aur p RD CCD V404 Aur p RD CCD; elem. IBVS No TU Boo s KL elem. A&AS 117, AC Boo p RD CCD Y Cam p KL TU Cam p KT normal min

3 AW Cam p KT normal min DD Cam p KT normal min., Hipparcos elem DN Cam p KT normal min., Hipparcos elem s KT normal min FN Cam p KT normal min., Hipparcos elem s KT normal min TX Cnc p RD CCD TY Cnc p KL WX Cnc p RD CCD AC Cnc p RD CCD UU CMa p KL RS CMi p RD CCD; el. BBSAG Bull. 112, TU CMi s RD CCD TX CMi s RD CCD; el. BBSAG Bull. 106, AK CMi p KL AV CMi p RD CCD RZ Cas p KT p KT p KT p KT p KT p KT p KT p KT YZ Cas p KT normal min AB Cas p KL CR Cas s : RD CCD IR Cas p KL IT Cas p RD CCD; elem. AJ 114, KL Cas p PG LU Cas p RD CCD MT Cas s RD CCD MV Cas p RD CCD MY Cas s RD CCD - 2 -

4 NN Cas s RD CCD NU Cas p EBl CCD OR Cas p KL V384 Cas p : RD CCD V471 Cas p EBl CCD V523 Cas p KL V537 Cas EBl CCD; see note p EBl CCD LD328 Cas p PG elem. BBSAG Bull. 123, p KL p KL p KL TV Cep p PG normal min WZ Cep s RD CCD; elem. AAS 131, XZ Cep p KT normal min AH Cep p KT normal min BR Cep p KL DE Cep p KL EI Cep p KT norm. m.; elem. AJ 119, HI Cep p KL elem. BBSAG Bull. 114, HK Cep p RD CCD IM Cep s RD CCD IO Cep p KL KV Cep p RD CCD; see note page LP Cep p PG elem. IBVS No V358 Cep p KL elem. BBSAG Bull. 96, TW Cet s KL VY Cet p KL RW Com p RD CCD; asymmetric minimum CC Com p RD CCD W Crv p KL V Crt p KL - 3 -

5 WW Cyg p KL WZ Cyg p KL NU Cyg p EBl CCD QW Cyg s : EBl CCD V366 Cyg s : EBl CCD V494 Cyg s EBl CCD V789 Cyg EBl CCD V809 Cyg p EBl CCD V842 Cyg p EBl CCD V859 Cyg p EBl CCD V865 Cyg p EBl CCD V874 Cyg s EBl CCD V877 Cyg p EBl CCD V880 Cyg p EBl CCD V931 Cyg p EBl CCD s EBl CCD V940 Cyg s EBl CCD; elem. BBSAG B. 122, p EBl CCD V1143 Cyg p KT normal min V1256 Cyg p : EBl CCD p EBl CCD GSC p EBl CCD; elem. IBVS No Cyg s EBl CCD p EBl CCD p EBl CCD GSC s EBl CCD; elem. IBVS No Cyg s EBl CCD p EBl CCD p EBl CCD s EBl CCD p EBl CCD p KL - 4 -

6 GSC3921. s EBl CCD Cyg s EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD W Del p JVe FZ Del p KL Z Dra p KL RR Dra p KL AR Dra p KL p RD CCD AU Dra p RD CCD; elem. IBVS No CM Dra p RD CCD DW Dra p KL elem. BBSAG Bull. 118, KK Dra p KL elem. JAAVSO 28, p KL p KL LD289 Dra p PG p PG TZ Eri p KL RW Gem p KL TX Gem p KL AF Gem p KL AH Gem p RD CCD; see note page s RD CCD AI Gem p RD CCD; see note page AN Gem p RD CCD BD Gem p RD CCD BO Gem p KL p RD CCD; see note p CK Gem p RD CCD CW Gem p RD CCD; elem. BAV Mitt CX Gem p KL DP Gem p RD CCD - 5 -

7 EY Gem p RD CCD FT Gem p RD CCD GX Gem p RD CCD; GCVS elem. erroneous LP Gem p KL RX Her p KT normal min TU Her p KL DP Her p PG MT Her p KL u Her p KT normal min GSC s KL Her p KL VW Hya p KL AS Hya p KL elem. BBSAG Bull. 83, GN Hya s RD CCD TZ Lac p RD CCD VX Lac p PG AU Lac p RD CCD CG Lac p RD CCD DG Lac p KL PP Lac p RD CCD Y Leo p KL XX Leo p RD CCD; see note p AL Leo p RD CCD; elem. IBVS No BL Leo p KL RT LMi s RD CCD RS Lep p KL RR Lyn p KT normal min RY Lyn p KL UU Lyn p RD CCD - 6 -

8 EW Lyr p PG p PG p PG p KL V400 Lyr p EBl CCD; elem. IBVS No s EBl CCD p EBl CCD s EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD GSC3123. s KL elem. IBVS No Lyr RW Mon p KL TV Mon p KL UU Mon p KL p RD CCD BM Mon p KL BO Mon p KL CP Mon p RD CCD V396 Mon p RD CCD V455 Mon p RD CCD V456 Mon p RD CCD V714 Mon s RD CCD V508 Oph s KL V511 Oph p APs CCD VV Ori p KT normal min DZ Ori p RD CCD; el. BBSAG Bull. 117, EF Ori p RD CCD FK Ori p KL FL Ori p KL FZ Ori p RD CCD V640 Ori p KL - 7 -

9 TY Peg p KL p RD CCD AY Peg p RD CCD BB Peg p RD CCD BG Peg p RD CCD; elem Brno Contr BY Peg s APs CCD CU Peg p PG RT Per p KL WY Per p KL p RD CCD XZ Per p KL p RD CCD BR Per p RD CCD; elem. Per. Zvezd 24, DK Per p RD CCD; elem. IBVS No KW Per p KL PS Per p KL V432 Per p RD CCD; elem BAV Rb. 43, SX Psc p KL SW Pyx p KL elem. BBSAG Bull. 91, AO Ser p KL AU Ser p KL CX Ser s RD CCD RZ Tau p BK CCD WY Tau s BK CCD AC Tau p KL AH Tau s KL s RD CCD s BK CCD AM Tau p RD CCD AP Tau s RD CCD ES Tau p KL GW Tau s RD CCD - 8 -

10 IV Tau p RD CCD p RD CCD V781 Tau p RD CCD V Tri p KL RV Tri p KL RW Tri p KL TY UMa p RD CCD; elem. JAAVSO 21, UX UMa p KL XZ UMa p KL ZZ UMa p KL AC UMa p KL AW UMa s KT normal min p KT normal min BH UMa p RD CCD BM UMa s RD CCD s RD CCD AK Vir p KL HW Vir p KL elem. IBVS No p KL p KL p KL p KL p KL p KL p KL p KL p KL p KL p KL p KL p KL p KL BO Vul p KL Notes on observations given in table above V537 Cas = GSC The two observed minima are of identical shape (range: mag, D = 0.13 d d, d = 0.02 d d ). Therefore, we conclude that the unknown period must be P = d /n. During two additional observing runs (JD and JD ) the variable was seen in maximum light. E. Blättler - 9 -

11 KV Cep The variable is the brighter, south-eastern component of a close double, which was not completely separated in our photometry. The true amplitude is considerably larger than stated in the GCVS. AH and AI Gem Both stars are about two magnitudes brighter than given in the GCVS (unfiltered CCD data). AH Gem is the middle component in a row of three stars. The northern component is very close to AH Gem and is not fully seperated on our CCD frames. BO Gem Only the ascending branch of the minimum was covered by our CCD measurements. The time of minimum is deduced from the time of first contact and the GCVS value for the duration of the minimum of D = 0.44 d. XX Leo We find a time of totality lasting for d primary = d d. R. Diethelm

BBSAG BULLETIN. October 1 st, LIST OF MINIMA OF ECLIPSING BINARIES

BBSAG BULLETIN. October 1 st, LIST OF MINIMA OF ECLIPSING BINARIES BBSAG BULLETIN 128 October 1 st, 2002 161. LIST OF MINIMA OF ECLIPSING BINARIES The following table lists 197 electronically recorded (CCD; underlined) and 143 visual timings of minima of eclipsing binaries