Blazars, one of the most extreme classes of active galaxies, constitute so far the largest known population of.-ray sources, and their number is continuously growing in the Fermi catalogs. However, in the latest release of the Fermi catalog there is still a large fraction of sources that are clas...
Crespo, NA
,
Massaro, F
,
Milisavljevic, D
,
Landoni, M
,
Chavushyan, V
,
Patino-Alvarez, V
,
Masetti, N
,
Jimenez-Bailon, E
,
Strader, J
,
Chomiuk, L
,
Katagiri, H
,
Kagaya, M
,
Cheung, CC
,
Paggi, A
,
D'Abrusco, R
,
Ricci, F
,
La Franca, F
,
Smith, HA
,
Tosti, G
,
[OPTICAL SPECTROSCOPIC OBSERVATIONS OF GAMMA-RAY BLAZAR CANDIDATES. VI. FURTHER OBSERVATIONS FROM TNG, WHT, OAN, SOAR, AND MAGELLAN TELESCOPES]
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OPTICAL SPECTROSCOPIC OBSERVATIONS OF GAMMA-RAY BLAZAR CANDIDATES. VI. FURTHER OBSERVATIONS FROM TNG, WHT, OAN, SOAR, AND MAGELLAN TELESCOPES
Oh, K
,
Schawinski, K
,
Koss, M
,
Trakhtenbrot, B
,
Lamperti, I
,
Ricci, C
,
Mushotzky, R
,
Veilleux, S
,
Berney, S
,
Crenshaw, DM
,
Gehrels, N
,
Harrison, F
,
Masetti, N
,
Soto, KT
,
Stern, D
,
Treister, E
,
Ueda, Y
,
[BAT AGN Spectroscopic Survey – III. An observed link between AGN Eddington ratio and narrow-emission-line ratios]
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BAT AGN Spectroscopic Survey – III. An observed link between AGN Eddington ratio and narrow-emission-line ratios
The existence of "radio-weak BL Lac objects" (RWBLs) has been an open question, and has remained unsolved since the discovery that quasars could be radio-quiet or radio-loud. Recently, several groups identified RWBL candidates, mostly found while searching for low-energy counterparts of the unide...
Massaro, F
,
Marchesini, EJ
,
D'Abrusco, R
,
Masetti, N
,
Andruchow, I
,
Smith, HA
,
[RADIO-WEAK BL LAC OBJECTS IN THE FERMI ERA]
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RADIO-WEAK BL LAC OBJECTS IN THE FERMI ERA
Context. Based on their overwhelming dominance among associated Fermi gamma-ray catalogue sources, it is expected that a large fraction of the unidentified Fermi objects are blazars. Through crossmatching between the positions of unidentified gamma-ray sources from the First Fermi Catalog of gamm...
Marchesini, EJ
,
Masetti, N
,
Chavushyan, V
,
Cellone, SA
,
Andruchow, I
,
Bassani, L
,
Bazzano, A
,
Jimenez-Bailon, E
,
Landi, R
,
Malizia, A
,
Palazzi, E
,
Patino-Alvarez, V
,
Rodriguez-Castillo, GA
,
Stephen, JB
,
Ubertini, P
,
[Looking for blazars in a sample of unidentified high-energy emitting Fermi sources]
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Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
Supergiant fast X-ray transients (SFXTs) are high mass X-ray binaries (HMXBs) hosting a neutron star and an OB supergiant companion. We examine the available Swift data, as well as other new or archival / serendipitous data, on three sources: IGR J17407 2808, 2XMM J185114.3 000004, and IGR J18175...
Romano, P
,
Bozzo, E
,
Esposito, P
,
Sbarufatti, B
,
Haberl, F
,
Ponti, G
,
D'Avanzo, P
,
Ducci, L
,
Segreto, A
,
Jin, C
,
Masetti, N
,
Del Santo, M
,
Campana, S
,
Mangano, V
,
[Searching for supergiant fast X-ray transients with Swift]
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Searching for supergiant fast X-ray transients with Swift