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J/AJ/139/2425       Historic light curves of 3 known blazars (Nesci, 2010)

GB6 J1058+5628: a new quasi-periodic BL Lac object from the Asiago plate archive. Nesci R. <Astron. J., 139, 2425-2432 (2010)> =2010AJ....139.2425N
ADC_Keywords: BL Lac objects ; QSOs ; Photometry, photographic Keywords: BL Lacertae objects: individual (GB6 J1058+5628, GB6 J1148+5254, GB6 J1209+4119) - galaxies: active Abstract: We present the historic photographic light curves of three little known blazars (two BL Lac objects and one FSRQ), GB6 J1058+5628, GB6 J1148+5254, and GB6 J1209+4119, spanning a time interval of about 50 years, mostly built using the Asiago plate archive. All objects show evident long-term variability, over which short-term variations are superposed. One source, GB6 J1058+5628, showed a marked quasi-periodic variability of 1mag on timescale of about 6.3 years, making it one of the few BL Lac objects with a quasi-periodic behavior. Description: Plates were digitized at the Asiago Observatory with an EPSON 1680 Plus scanner, a sampling step of 16um (1600 dpi) in grayscale/transparency mode and 16 bit resolution. Plate scanning also included the unexposed borders to measure the plate fog level (F). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 10 58 37.73 +56 28 11.2 GB6J1058+5628 = 2EG J1054+5736 11 48 56.57 +52 54 25.3 GB6J1148+5254 = BWE 1146+5311 12 09 22.79 +41 19 41.4 GB6J1209+4119 = BWE 1206+4136 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 55 251 Historic BJ magnitudes from the Asiago archive
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Source name 15- 25 A11 --- Plate Plate identification 27- 31 A5 --- Filt Filter used 33- 44 F12.4 d JD Julian date of observation 46- 50 F5.2 mag Bmag Observed BJ band magnitude 52- 55 F4.2 mag e_Bmag Error in Bmag
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 02-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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