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J/ApJ/676/944 GALEX and CFHTLS candidate tidal disruption events (Gezari+, 2008)

UV/Optical detections of candidate tidal disruption events by GALEX and CFHTLS. Gezari S., Basa S., Martin D.C., Bazin G., Forster K., Milliard B., Halpern J.P., Friedman P.G., Morrissey P., Neff S.G., Schiminovich D., Seibert M., Small T., Wyder T.K. <Astrophys. J., 676, 944-969 (2008)> =2008ApJ...676..944G
ADC_Keywords: Ultraviolet ; Galaxies, optical ; Photometry, SDSS Keywords: galaxies: nuclei - ultraviolet: galaxies - X-rays: galaxies Abstract: We present two luminous UV/optical flares from the nuclei of apparently inactive early-type galaxies at z=0.37 and 0.33 that have the radiative properties of a flare from the tidal disruption of a star. In this paper we report the second candidate tidal disruption event discovery in the UV by the GALEX Deep Imaging Survey and present simultaneous optical light curves from the CFHTLS Deep Imaging Survey for both UV flares. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file sources.dat 167 87 UV variable sources with optical matches in XMM-LSS (D1, 23 sources, table 2), COSMOS (D2, 23 sources, table 3), GROTH (D3, 32 sources, table 4), CFHTLS (D4, 9 sources, table 5), matches.dat 112 87 Optical matches to UV variable sources in XMM-LSS (D1, table 6), COSMOS (D2, table 7), GROTH (D3, table 8) and CFHTLS (D4, table 9) table10.dat 55 11 Tidal disruption flare candidates table11.dat 80 8 Log of optical spectroscopic observations
See also: II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007) J/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005) J/AJ/130/825 : GALEX ultraviolet variability catalog (Welsh+, 2005) J/AJ/133/1780 : GALEX/SDSS quasar catalog (Trammell+, 2007) J/ApJ/664/53 : UV photometry of GALEX QSO candidates (Atlee+, 2007) J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+ 2007) J/ApJS/173/441 : UV-Luminous galaxies discovered by GALEX (Hoopes+, 2007) J/MNRAS/382/279 : XMM-LSS catalogue. Version I. (Pierre+, 2007) Byte-by-byte Description of file: sources.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Name (DN-NN) 7- 22 A16 --- GALEX GALEX name (JHHMMSS.s+DDMMSS) 24- 31 F8.4 deg RAdeg Right ascension in decimal degrees (J2000) 33- 40 F8.4 deg DEdeg Declination in decimal degrees (J2000) 42 A1 --- l_FUV03 Limit flag on FUV03 43- 47 F5.2 mag FUV03 ?=- GALEX FUV (135-175nm) magnitude in 2003 49- 52 F4.2 mag e_FUV03 ? rms uncertainty on FUV03 54 A1 --- l_FUV04 Limit flag on FUV04 55- 59 F5.2 mag FUV04 GALEX FUV (135-175nm) magnitude in 2004 61- 64 F4.2 mag e_FUV04 ? rms uncertainty on FUV04 66 A1 --- l_FUV05 Limit flag on FUV05 67- 71 F5.2 mag FUV05 ?=- GALEX FUV (135-175nm) magnitude in 2005 73- 76 F4.2 mag e_FUV05 ? rms uncertainty on FUV05 78 A1 --- l_FUV06 Limit flag on FUV06 79- 83 F5.2 mag FUV06 GALEX FUV (135-175nm) magnitude in 2006 85- 88 F4.2 mag e_FUV06 ? rms uncertainty on FUV06 90 A1 --- l_FUV07 Limit flag on FUV07 91- 95 F5.2 mag FUV07 ?=- GALEX FUV (135-175nm) magnitude in 2007 97-100 F4.2 mag e_FUV07 ? rms uncertainty on FUV07 102-105 F4.1 --- sigma Factor times σ(m) that the source varies 107 A1 --- FT [FT] Flare/Transient Type (G1) 109 A1 --- l_NUV03 Limit flag on NUV03 110-114 F5.2 mag NUV03 ?=- GALEX NUV (175-280nm) magnitude in 2003 116-119 F4.2 mag e_NUV03 ? rms uncertainty on NUV03 121 A1 --- l_NUV04 Limit flag on NUV04 122-126 F5.2 mag NUV04 GALEX NUV (175-280nm) magnitude in 2004 128-131 F4.2 mag e_NUV04 ? rms uncertainty on NUV04 133 A1 --- l_NUV05 Limit flag on NUV05 134-138 F5.2 mag NUV05 ?=- GALEX NUV (175-280nm) magnitude in 2005 140-143 F4.2 mag e_NUV05 ? rms uncertainty on NUV05 145 A1 --- l_NUV06 Limit flag on NUV06 146-150 F5.2 mag NUV06 GALEX NUV (175-280nm) magnitude in 2006 152-155 F4.2 mag e_NUV06 ? rms uncertainty on NUV06 157 A1 --- l_NUV07 Limit flag on NUV07 158-162 F5.2 mag NUV07 ?=- GALEX NUV (175-280nm) magnitude in 2007 164-167 F4.2 mag e_NUV07 ? rms uncertainty on NUV07
Byte-by-byte Description of file: matches.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Name (DN-NN) 7- 22 A16 --- GALEX GALEX name (JHHMMSS.s+DDMMSS) 24- 29 F6.3 mag umag SDSS u magnitude 31- 35 F5.3 mag e_umag rms uncertainty on umag 37- 42 F6.3 mag gmag SDSS g magnitude 44- 48 F5.3 mag e_gmag rms uncertainty on gmag 50- 55 F6.3 mag rmag SDSS r magnitude 57- 61 F5.3 mag e_rmag rms uncertainty on rmag 63- 68 F6.3 mag imag SDSS i magnitude 70- 74 F5.3 mag e_imag rms uncertainty on imag 76- 81 F6.3 mag zmag SDSS z magnitude 83- 87 F5.3 mag e_zmag rms uncertainty on zmag 89- 93 F5.3 arcsec r1/2 Half-light radius 95- 97 F3.1 arcsec Sep Separation UV/optical 99-101 A3 --- Flag [oxsg ] Source pecularities (G2) 103-106 A4 --- Class Classification (1) 108-112 F5.3 --- z ? Redshift
Note (1): Classification as follows: QSO = optically unresolved sources (r1/2<0.6") with g-r<0.6 and u-g<1 are classified as quasars STAR = optically unresolved sources with u-g>1.75 or g-r<0.6 and u-g>1 are classified as stars GAL = optically resolved sources (r1/2>0.6") are classified as galaxies AGN = optically resolved sources with a hard X-ray detection or an active galaxy spectrum are classified as active galactic nuclei
Byte-by-byte Description of file: table10.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Name (DN-NN) 7- 22 A16 --- GALEX GALEX name (JHHMMSS.s+DDMMSS) 24 A1 --- FT [FT] Flare Type (G1) 26 A1 --- Flag [o] Source pecularities (G2) 28- 31 A4 --- Template Galaxy template from photo-z fitting routine (1) 33- 36 F4.2 --- zph1 Photometric redshift range 37 A1 --- --- [-] 38- 41 F4.2 --- zph2 Photometric redshift range 43- 48 F6.4 --- zsp ? Spectroscopic redshift 50- 55 A6 --- Type Spectral type (2)
Note (1): Emission-line galaxies (either star-forming or Seyfert galaxies) are labeled as "em". Note (2): Classes are: Early = spectra with no emission lines (early-type galaxies) Sy2 = spectra with diagnostic narrow-line ratios of ([OIII]λ5007)/(Hβ)>3 (Seyfert 2 galaxies) Sy1 = spectra that show broad Hβ emission (Seyfert 1 galaxies)
Byte-by-byte Description of file: table11.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Name Name (DN-NN) 7- 22 A16 --- GALEX GALEX name (JHHMMSS.s+DDMMSS) 24- 33 A10 "YYYY/MM/DD" Date UT date 35- 42 A8 -- Tel Telescope 44- 48 A5 --- Inst Instrument 50- 52 F3.1 arcsec Slit Slit 54- 57 F4.1 0.1nm Dlambda Interval wavelength 59- 62 I4 s Texp Exposure time 64- 69 F6.4 --- z Spectroscopic redshift 71 A1 --- l_[OIII/Hb] Limit flag on [OIII/Hb] 72- 74 F3.1 --- [OIII/Hb] ? [OIII]λ5007)/(Hβ) narrow-line ratio 76 A1 --- l_logL([OIII]) Limit flag on logL([OIII)] 77- 80 F4.1 [10-7W] logL([OIII]) ? [OIII]λ5007 luminosity
Global notes: Note (G1): Flare type flag as follows: F = FUV flares that fade monotonically, have a steady flux before the flare, and do not fade below the steady state flux T = Transient FUV flares that fade monotonically and are not detected before the start of the flare Note (G2): Flag as follows: o = sources that are optically variable x = sources detected as a hard X-ray point source s = sources with an optical AGN spectrum g = sources with a UV quasar spectrum
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Sep-2010
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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