Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993

E. Pian; R. Edelson; S. Wagner; J. Bregman; I. George; A. Treves; W. Wamsteker; H. Bock; M. Carini; T. Courvoisier; M. Donahue; Y. Efimov; A. Filippenko; H. Fink; J. Heidt; A. Lawrence; L. Maraschi; H. R. Miller; G. Pike; A. Quirrenbach; N. Shakhovskoy; A. Sillanpåå; M. Sitko; P. Smith; L. Takalo; H. Teråsranta; E. Valtaoja; M. Ward; R. Warwick

doi:10.1016/0273-1177(95)00043-E

Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993

E. Pian, R. Edelson, S. Wagner, J. Bregman, I. George, A. Treves, W. Wamsteker, H. Bock, M. Carini, T. Courvoisier, M. Donahue, Y. Efimov, A. Filippenko, H. Fink, J. Heidt, A. Lawrence, L. Maraschi, H. R. Miller, G. Pike, A. QuirrenbachN. Shakhovskoy, A. Sillanpåå, M. Sitko, P. Smith, L. Takalo, H. Teråsranta, E. Valtaoja, M. Ward, R. Warwick

Steward Observatory

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2 Scopus citations

Abstract

The BL Lacertae object OJ 287 was intensively monitored with the IUE satellite from 1993 March 15 to 20 in the 2000-3000 Å wavelength region. The very low emission state of the source hampered the detection during part of the 23 performed exposures. The light curve at 2650 Å constructed with the 11 best images exhibits a variable trend with a factor ≲ 2 enhancement of the flux in about 3 hours. Simultaneous ground based observations show an optical flux variability of smaller amplitude, but correlated with the UV light curve without any apparent lag. The radio light curve is nearly constant. The UV emission state is the weakest observed in 15 years for this flaring blazar, being a factor of ≲ 20 lower than the maximum recorded one.

Original language	English (US)
Pages (from-to)	57-60
Number of pages	4
Journal	Advances in Space Research
Volume	16
Issue number	3
DOIs	https://doi.org/10.1016/0273-1177(95)00043-E
State	Published - 1995

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
General Earth and Planetary Sciences

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10.1016/0273-1177(95)00043-E

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Pian, E., Edelson, R., Wagner, S., Bregman, J., George, I., Treves, A., Wamsteker, W., Bock, H., Carini, M., Courvoisier, T., Donahue, M., Efimov, Y., Filippenko, A., Fink, H., Heidt, J., Lawrence, A., Maraschi, L., Miller, H. R., Pike, G., ... Warwick, R. (1995). Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993. Advances in Space Research, 16(3), 57-60. https://doi.org/10.1016/0273-1177(95)00043-E

Pian, E, Edelson, R, Wagner, S, Bregman, J, George, I, Treves, A, Wamsteker, W, Bock, H, Carini, M, Courvoisier, T, Donahue, M, Efimov, Y, Filippenko, A, Fink, H, Heidt, J, Lawrence, A, Maraschi, L, Miller, HR, Pike, G, Quirrenbach, A, Shakhovskoy, N, Sillanpåå, A, Sitko, M, Smith, P, Takalo, L, Teråsranta, H, Valtaoja, E, Ward, M & Warwick, R 1995, 'Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993', Advances in Space Research, vol. 16, no. 3, pp. 57-60. https://doi.org/10.1016/0273-1177(95)00043-E

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title = "Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993",

abstract = "The BL Lacertae object OJ 287 was intensively monitored with the IUE satellite from 1993 March 15 to 20 in the 2000-3000 {\AA} wavelength region. The very low emission state of the source hampered the detection during part of the 23 performed exposures. The light curve at 2650 {\AA} constructed with the 11 best images exhibits a variable trend with a factor ≲ 2 enhancement of the flux in about 3 hours. Simultaneous ground based observations show an optical flux variability of smaller amplitude, but correlated with the UV light curve without any apparent lag. The radio light curve is nearly constant. The UV emission state is the weakest observed in 15 years for this flaring blazar, being a factor of ≲ 20 lower than the maximum recorded one.",

author = "E. Pian and R. Edelson and S. Wagner and J. Bregman and I. George and A. Treves and W. Wamsteker and H. Bock and M. Carini and T. Courvoisier and M. Donahue and Y. Efimov and A. Filippenko and H. Fink and J. Heidt and A. Lawrence and L. Maraschi and Miller, {H. R.} and G. Pike and A. Quirrenbach and N. Shakhovskoy and A. Sillanp{\aa}{\aa} and M. Sitko and P. Smith and L. Takalo and H. Ter{\aa}sranta and E. Valtaoja and M. Ward and R. Warwick",

year = "1995",

doi = "10.1016/0273-1177(95)00043-E",

language = "English (US)",

volume = "16",

pages = "57--60",

journal = "Advances in Space Research",

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TY - JOUR

T1 - Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993

AU - Pian, E.

AU - Edelson, R.

AU - Wagner, S.

AU - Bregman, J.

AU - George, I.

AU - Treves, A.

AU - Wamsteker, W.

AU - Bock, H.

AU - Carini, M.

AU - Courvoisier, T.

AU - Donahue, M.

AU - Efimov, Y.

AU - Filippenko, A.

AU - Fink, H.

AU - Heidt, J.

AU - Lawrence, A.

AU - Maraschi, L.

AU - Miller, H. R.

AU - Pike, G.

AU - Quirrenbach, A.

AU - Shakhovskoy, N.

AU - Sillanpåå, A.

AU - Sitko, M.

AU - Smith, P.

AU - Takalo, L.

AU - Teråsranta, H.

AU - Valtaoja, E.

AU - Ward, M.

AU - Warwick, R.

PY - 1995

Y1 - 1995

N2 - The BL Lacertae object OJ 287 was intensively monitored with the IUE satellite from 1993 March 15 to 20 in the 2000-3000 Å wavelength region. The very low emission state of the source hampered the detection during part of the 23 performed exposures. The light curve at 2650 Å constructed with the 11 best images exhibits a variable trend with a factor ≲ 2 enhancement of the flux in about 3 hours. Simultaneous ground based observations show an optical flux variability of smaller amplitude, but correlated with the UV light curve without any apparent lag. The radio light curve is nearly constant. The UV emission state is the weakest observed in 15 years for this flaring blazar, being a factor of ≲ 20 lower than the maximum recorded one.

AB - The BL Lacertae object OJ 287 was intensively monitored with the IUE satellite from 1993 March 15 to 20 in the 2000-3000 Å wavelength region. The very low emission state of the source hampered the detection during part of the 23 performed exposures. The light curve at 2650 Å constructed with the 11 best images exhibits a variable trend with a factor ≲ 2 enhancement of the flux in about 3 hours. Simultaneous ground based observations show an optical flux variability of smaller amplitude, but correlated with the UV light curve without any apparent lag. The radio light curve is nearly constant. The UV emission state is the weakest observed in 15 years for this flaring blazar, being a factor of ≲ 20 lower than the maximum recorded one.

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U2 - 10.1016/0273-1177(95)00043-E

DO - 10.1016/0273-1177(95)00043-E

M3 - Article

AN - SCOPUS:58149364153

SN - 0273-1177

VL - 16

SP - 57

EP - 60

JO - Advances in Space Research

JF - Advances in Space Research

IS - 3

ER -

Simultaneous UV, optical and radio monitoring of the BL Lac object OJ 287 in March 1993

Abstract

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