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

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1 BBSAG BULLETIN 128 October 1 st, LIST OF MINIMA OF ECLIPSING BINARIES The following table lists 197 electronically recorded (CCD; underlined) and 143 visual timings of minima of eclipsing binaries obtained primarily between April and September 2002 by the following observers: EBl RD KL CPa APs KT Ernst Blaettler, Wald, Switzerland, blaettler-wald@bluewin.ch Roger Diethelm, R. Szafraniec Observatory, Metzerlen, Switzerland, diethelm@astro.unibas.ch Kurt Locher, Grüt, Switzerland, locher@tommasi.ch Carlo Pampaloni, Firenze, Italy Anton Paschke, Rüti, Switzerland, Anton@Paschke.com Kari A. Tikkanen, Oulu, Finland, ktikkane@mail.student.oulu.fi 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 37794 UU And p KL XZ And p KL EP And p KL elem. IBVS No EX And p RD CCD KN And p APs CCD; elem. BAV Rdb. 36, CX Aqr p KL CZ Aqr p KL EI Aqr p APs CCD FS Aqr s EBl CCD; elem. Per. Zv. 22, p EBl CCD GK Aqr p KL elem. P.Zv. 22, GS Aqr s? EBl CCD; elem. Per. Zv. 22, LT Aql p KL V479 Aql p KL V616 Aql p RD CCD; elem. MVS 11, V803 Aql p KL V873 Aql s RD CCD V917 Aql p KL V1168 Aql p RD CCD V1355 Aql s RD CCD WW Aur p CPa TU Boo s KL elem. A&ASS 117, TY Boo p RD CCD; elem. BAV Mitt. 68, s EBl CCD TZ Boo p EBl CCD AC Boo s : : 11 EBl CCD CV Boo p RD CCD; elem. IBVS No GSC2016 s EBl CCD; elem. IBVS No :830 Boo GSC2020 s EBl CCD; elem. IBVS No :736 Boo GSC2020 s EBl CCD; elem. IBVS No :873 Boo GSC2022:79 p EBl CCD; elem. IBVS No Boo - 1 -

3 37825 Y Cam p KL GQ Cnc s RD CCD; elem. IBVS No DF CVn s EBl CCD; elem. IBVS No GSC2530 p EBl CCD; elem. IBVS No :488 CVn R CMa p CPa elem. AJ 117, p CPa TY CMi p APs CCD AK CMi p KL RZ Cas p KT p KT p KT p KT p KT p KT p KT AB Cas p KL AE Cas p KL AH Cas p KL AT Cas p RD CCD BW Cas p RD CCD; elem. BBSAG Bull. 122, IR Cas p KL V523 Cas p KL elem. MNRAS 317, WY Cep s RD CCD XY Cep p RD CCD DK Cep p RD CCD DV Cep p RD CCD; elem. AAVSO EB No FL Cep p RD CCD HI Cep p KL elem. BBSAG Bull. 114, IO Cep p KL V357 Cep p KL elem. Brno Contr. 28, V358 Cep p KL elem. BBSAG Bull. 96, V489 Cep p RD CCD; elem. IBVS No TW Cet p KL VY Cet p KL - 2 -

4 37859 GSC1991 p EBl CCD; elem. IBVS No :1390 Com GSC1991 s EBl CCD; elem. IBVS No :1633 Com U CrB p EBl CCD RT CrB p EBl CCD RW CrB p EBl CCD TW CrB p EBl CCD GSC2040 s EBl CCD; elem. IBVS No :1361 CrB p EBl CCD s EBl CCD s EBl CCD s EBl CCD p EBl CCD p EBl CCD GSC2579 s EBl CCD; elem. IBVS No :1125 CrB s EBl CCD p EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD GSC2580 s EBl CCD; elem. IBVS No :2086 CrB p EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD s EBl CCD s EBl CCD p EBl CCD W Crv p KL WW Cyg p KL WZ Cyg p KL ZZ Cyg p KL BR Cyg p KL PW Cyg p RD CCD V370 Cyg p KL V445 Cyg p KL p RD CCD V488 Cyg s RD CCD - 3 -

5 37899 V726 Cyg p KL p RD CCD V728 Cyg p KL V753 Cyg p RD CCD; elem. BAV Mitt V807 Cyg s RD CCD V853 Cyg p RD CCD V869 Cyg p RD CCD V884 Cyg s RD CCD V1416 Cyg p RD CCD p RD CCD V1723 Cyg p RD CCD V1763 Cyg s RD CCD; elem. ROTSE V1823 Cyg p KL elem. IBVS No V1870 Cyg p RD CCD; elem. A&AS 81, GSC3547 s EBl CCD; elem. IBVS No :216 Cyg s KL GSC3551 p EBl CCD; elem. IBVS No :81 Cyg s EBl CCD GSC3564 s EBl CCD; elem. IBVS No :3059 Cyg GSC3921 s EBl CCD; elem. IBVS No :1531 Cyg BH Del p APs CCD FZ Del p KL Z Dra p KL RR Dra p KL RZ Dra p RD CCD TW Dra p KT norm. min p KT norm. min BX Dra p RD CCD; elem. IBVS No CV Dra s RD CCD; elem. BAV Mitt DW Dra p KL elem. BBSAG Bull. 118, EF Dra p RD CCD; elem. AAc 41, IV Dra p EBl CCD; refined p.: d (IBVS 4610) - 4 -

6 37931 KK Dra p KL elem. JAAVSO 28, p RD CCD GSC3549 p EBl CCD; elem. IBVS No :929 Dra RU Eri p APs CCD WW Eri p APs CCD BT Gem p RD CCD SZ Her p KL TU Her p KL CC Her p KL GL Her p KL MT Her p KL p RD CCD V687 Her s EBl CCD p RD CCD V718 Her RD CCD; GCVS period erroneous EBl CCD V731 Her s EBl CCD; elem. ROTSE V732 Her EBl CCD; probably pulsating var V842 Her p EBl CCD; elem. IBVS No s RD CCD V1005 Her s RD CCD; elem. IBVS No GSC983 p KL elem. IBVS No :1044 Her p KL p KL p KL GSC1522 p EBl CCD; elem. see note p :599 Her s EBl CCD p EBl CCD p EBl CCD GSC2056 p KL :117 Her s KL s KL p KL s KL p KL GSC2063 p EBl CCD; elem. IBVS No :902 Her GSC2066 p EBl CCD; elem. IBVS No :1210 Her - 5 -

7 37968 GSC2083 p EBl CCD; elem. IBVS No :1870 Her p EBl CCD s EBl CCD p EBl CCD p EBl CCD s EBl CCD s EBl CCD s EBl CCD GSC2593 s EBl CCD; ROTSE1 J :1348 Her GSC2594 s EBl CCD; elem. IBVS No :1289 Her p EBl CCD GSC2604 s KL elem. IBVS No. 5192; see note p :1671 Her s KL p KL p KL p KL p KL s KL s EBl CCD p KL s KL GSC2613 s EBl CCD; elem. IBVS No :1412 Her s EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD GSC2625 p EBl CCD; elem. IBVS No :1563 Her GSC3073 p KL elem. IBVS No :837 Her s KL p KL s KL p KL s KL s KL p KL s EBl CCD s KL p KL s KL p KL p KL GSC3094 p EBl CCD;elem. IBVS No :120 Her GSC3098 p EBl CCD;elem. IBVS No :683 Her s EBl CCD p EBl CCD p EBl CCD s EBl CCD s EBl CCD - 6 -

8 38018 GSC3098 s EBl CCD; elem. IBVS No :1253 Her p EBl CCD p EBl CCD s EBl CCD p EBl CCD p EBl CCD s EBl CCD p EBl CCD s EBl CCD s EBl CCD p EBl CCD p EBl CCD GSC3099 s EBl CCD; elem. IBVS No :905 Her GSC3100 p EBl CCD; elem. IBVS No :1616 Her J p EBl CCD; elem. IBVS No Her SX Hya p KL SY Hya p KL DG Lac p KL HX Lac p RD CCD OO Lac p KL Y Leo p KL RW Leo p KL UZ Leo p RD CCD BL Leo p KL BW Leo RD CCD CE Leo s RD CCD RT LMi p RD CCD RV Lyr p KL TT Lyr p KL UZ Lyr p KL DF Lyr s RD CCD EW Lyr p KL PY Lyr s RD CCD QU Lyr s RD CCD V361 Lyr p KL elem. IBVS No

9 38053 V400 Lyr s EBl CCD; elem. IBVS No V507 Lyr s RD CCD; elem. AJ 112, GSC2632 s EBl CCD; elem. IBVS No :319 Lyr GSC2636 p EBl CCD; elem. IBVS No :1753 Lyr GSC2646 s EBl CCD; elem. IBVS No :1938 Lyr GSC3104 s EBl CCD; elem. IBVS No :1384 Lyr GSC3123 s KL elem. IBVS No :1618 Lyr p EBl CCD GSC3540 p EBl CCD; elem. IBVS No :85 Lyr RV Oph p KL V449 Oph p KL V451 Oph s RD CCD; displaced secondary V508 Oph p KL V577 Oph p RD CCD V913 Oph p KL EG Ori p APs CCD TY Peg p KL CW Peg p KL DK Peg p APs CCD DO Peg p KL RT Per p KL DK Per p KL elem. IBVS No DM Per p CPa KW Per p KL UZ Sge p KL GSC1621 s KL elem. see note p :2192 Sge p KL s KL p KL s KL s KL p KL p KL s KL p KL s KL - 8 -

10 38089 GSC1621 s KL elem. see note p :2192 Sge p KL p KL WX Sgr p KL XY Sgr p KL AK Ser p KL AO Ser p KL AU Ser s KL BI Ser p RD CCD s EBl CCD p EBl CCD CC Ser s EBl CCD; new elements see p p EBl CCD p EBl CCD p EBl CCD p EBl CCD p EBl CCD s EBl CCD CX Ser s RD CCD s EBl CCD GSC2035 s EBl CCD; elem. IBVS No :175 Ser s EBl CCD p EBl CCD p EBl CCD s EBl CCD p EBl CCD s EBl CCD s EBl CCD p EBl CCD s EBl CCD p EBl CCD s EBl CCD AH Tau s KL RV Tri p KL RW Tri p APs CCD TX UMa p CPa UX UMa p KL GSC3002 p KL elelem. IBVS No :454 UMa HW Vir p KL elem. A&A 364, AY Vul p KL BE Vul p KL - 9 -

11 38130 BO Vul p KL BP Vul p KL GI Vul p RD CCD NO Vul s RD CCD CCD light curve of CC Serpentis, refinement of the elements of variation The EW type eclipsing binary CC Serpentis has been observed rather sparsly in the past. In order to ameliorate this situation, we have obtained a CCD survey (ST-7 camera, no filter) during the 2002 observing season. The following Figure shows our data, folded with the newly determined elements of variation: Min (JD, hel) = * E. These elements are derived from a linear fit to the available timings of minima. The assignment of the primary and secondary minimum is not entirely secure. Phase CC Ser: * E Refinement of elements of variation for ROTSE1 variables E. Blättler, R. Diethelm New timings of minima of recently discovered EW type stars during the past observing season lead to the following refined elements of variation: Star IBVS paper Elements GSC1522:599 Her IBVS No * E GSC2604:1671 Her IBVS No * E GSC1621:2192 Sge IBVS No * E K. Locher, E. Blättler, R. Diethelm

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