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J/A+A/534/A31     Spectroscopic study of 283 AGNs in Coma    (Gavazzi+, 2011)

The complete census of optically selected AGNs in the Coma supercluster: the dependence of AGN activity on the local environment. Gavazzi G., Savorgnan G., Fumagalli M. <Astron. Astrophys., 534, A31 (2011)> =2011A&A...534A..31G
ADC_Keywords: Clusters, galaxy ; Active gal. nuclei ; Redshifts ; Equivalent widths Keywords: galaxies: clusters: individual: Coma - galaxies: evolution - galaxies: nuclei Abstract: To investigate the dependence of the occurrence of active galactic nuclei (AGNs) on local galaxy density, we study the nuclear properties of ∼5000 galaxies in the Coma supercluster whose density spans two orders of magnitude from the sparse filaments to the cores of rich clusters. Description: We obtained optical spectra of the nuclei of 283 galaxies using the 1.5m Cassini telescope of Bologna observatory during 14 runs from 2005 to 2011, using the Bologna Faint Object Spectrograph and Camera (BFOSC) attached to the 152cm F/8 Cassini Telescope located in Loiano, belonging to the Observatory of Bologna. Among these galaxies, 177 belong to the Coma supercluster and are added to the 4785 spectra available from SDSS (DR7) to fill-in the incomplete coverage by SDSS of luminous galaxies. We perform a spectral classification of the nuclei of galaxies in this region (with a completeness of 98% at r≤17.77), classifying the nuclear spectra in six classes: three of them (SEY, sAGN, LIN) refer to AGNs and the remaining three (HII, RET, PAS) refer to different stages of starburst activity. We perform this classification as recommended by Cid Fernandes and collaborators using the ratio of λ6584 [NII] to Hα lines and the equivalent width of Hα (WHAN diagnostic), after correcting the last quantity by 1.3Å for underlying absorption. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 87 283 Parameters of 283 galaxies observed at Loiano
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Name Galaxy name 17- 18 I2 h RAh Right ascension (J2000) 20- 21 I2 min RAm Right ascension (J2000) 23- 26 F4.1 s RAs Right ascension (J2000) 28 A1 --- DE- Declination sign (J2000) 29- 30 I2 deg DEd Declination (J2000) 32- 33 I2 arcmin DEm Declination (J2000) 35- 36 I2 arcsec DEs Declination (J2000) 38- 45 F8.5 --- z Redshift 47- 57 F11.5 0.1nm W(Ha) Equivalent width of Hα line 59- 66 F8.3 0.1nm W(NII) Equivalent width of {lalmbda}6584 [NII] line 68- 71 A4 --- Class Type of galaxy (1) 73- 81 A9 --- n_z Other spectra available in NED and/or SDSS (2) 83- 87 A5 --- Act Type of activity
Note (1): Type of galaxy as follows: HII = HII region-like LIN = weak AGNs PAS = passive nuclei RET = fake AGNs SY1 = Seyfert 1 galaxies sAGN = strong AGN Note (2): SDSS-corr means that the SDSS spectrum is partly corrupted
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Dec-2011
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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