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J/MNRAS/394/872     UBVRI differential photometry of DM UMa  (Rosario+, 2009)
Spot activity in the RS CVn binary DM Ursae Majoris.
    Rosario M.J., Heckert P.A., Mekkaden M.V., Raveendran A.V.
   <Mon. Not. R. Astron. Soc., 394, 872-881 (2009)>
   =2009MNRAS.394..872R
ADC_Keywords: Binaries, spectroscopic ; Photometry, UBVRI

Keywords: stars: activity - binaries: spectroscopic -
          stars: individual: DM UMa - stars: late-type

Abstract:
    We present extensive UBVRI photometry of the active RS CVn binary
    DM UMa obtained at two different observatories over 1988-2008.

Description:
    During 1993-94 and 2004-08, DM UMa was observed on a total of 82
    nights in standard Johnson BV bands with the 34-cm telescope of Vainu
    Bappu Observatory, Kavalur. All the measurements were made with
    respect to BD+60 1301 during 1993-94 and with respect to
    BD+61 1210 during 2004-08. BD+61 1210 and BD+60 1297 were
    observed as check stars during the first and second periods,
    respectively.
    DM UMa was also observed with the 60-cm telescope operated by San
    Diego State University at Mt Laguna, CA, on a total of 213 nights
    simultaneously in standard Johnson UBV bands during 1988-89 and in
    UBVRI bands during 1990-2007. BD+60 1301 was used as the comparison
    and BD+60 1306 as the check star.
Objects:
    ----------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------
    10 55 43.5   +60 28 10   DM UMa = BD+61 1211
    ----------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        24       86   BV photometry of DM UMa obtained at Kavalur
table2.dat        46      221   UBVRI photometry of DM UMa obtained at Mt Laguna


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1- 11  F11.3 d       JD        Julian date of observation
  13- 17  F5.3  mag     DVmag     Differential Johnson V magnitude
  19- 24  F6.3  mag     DB-V      ?=- Differential Johnson B-V colour index


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       JD        Julian date of observation
  14- 18  F5.3  mag     DVmag     Differential Johnson V magnitude
  20- 25  F6.3  mag     DU-B      Differential Johnson U-B colour index
  27- 32  F6.3  mag     DB-V      Differential Johnson B-V colour index
  34- 39  F6.3  mag     DV-R      ?=- Differential Johnson V-R colour index
  41- 46  F6.3  mag     DV-I      ?=- Differential Johnson V-I colour index


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    07-Sep-2010