scholarly journals H.E.S.S. Monitoring of PKS 2155-304 in 2015 and 2016

Galaxies ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 21 ◽  
Author(s):  
Alicja Wierzcholska ◽  
Michael Zacharias ◽  
Felix Jankowsky ◽  
Stefan Wagner ◽  
for for the H.E.S.S. Collaboration
Keyword(s):  
Southern Hemisphere ◽  
Time Lags ◽  
Broadband Emission ◽  
First Time ◽  
Multiwavelength Variability ◽  
Temporal Coverage

PKS 2155-304 is one of the brightest blazar located in Southern Hemisphere, monitored with H.E.S.S. since the first light of the experiment. Here we report multiwavelength monitoring observations collected during the period of 2015–2016 with H.E.S.S., Fermi-LAT, Swift-XRT, Swift-UVOT, and ATOM. Two years of multiwavelength data with very good temporal coverage allowed to characterize broadband emission observed from the region of PKS 2155-304 and study potential multifrequency correlations. During the period of monitoring, PKS 2155-304 revealed complex multiwavelength variability with two outbursts characterized by completely different multiband properties. The 2015 activity of the blazar is characterized by a flare observed at all wavelengths studied. The broadband emission observed during the outburst is well correlated without any time lags. Contrary to 2015, in 2016, only orphan outburst in the optical and ultraviolet wavelengths was observed. Such an orphan activity is reported for the first time for the blazar PKS 2155-304.

scholarly journals CPC2 Reduction with Hipparcos and Proper Motions in The Southern Hemisphere

1998 ◽  
Vol 11 (1) ◽  
pp. 551-551
Author(s):  
N. Zacharias ◽  
M.I. Zacharias ◽  
C. de Vegt ◽  
C.A. Murray
Keyword(s):  
Southern Hemisphere ◽  
Systematic Errors ◽  
Reference Star ◽  
Proper Motions ◽  
Positional Accuracy ◽  
Star Catalog ◽  
Naval Observatory ◽  
Celestial Reference System ◽  
First Time ◽  
Better Than

The Second Cape Photographic Catalog (CPC2) contains 276,131 stars covering the entire Southern Hemisphere in a 4-fold overlap pattern. Its mean epoch is 1968, which makes it a key catalog for proper motions. A new reduction of the 5687 plates using on average 40 Hipparcos stars per plate has resulted in a vastly improved catalog with a positional accuracy of about 40 mas (median value) per coordinate, which comes very close to the measuring precision. In particular, for the first time systematic errors depending on magnitude and color can be solved unambiguously and have been removed from the catalog. In combination with the Tycho Catalogue (mean epoch 1991.25) and the upcoming U.S. Naval Observatory CCD Astrograph Catalog (UCAC) project proper motions better than 2 mas/yr can be obtained. This will lead to a vastly improved reference star catalog in the Southern Hemisphere for the final Astrographic Catalogue (AC) reductions, which will then provide propermotions for millions of stars when combined with new epoch data. These data then will allow an uncompromised reduction of the southern Schmidt surveys on the International Celestial Reference System (ICRS).

ECTOMYCORRHIZAL FUNGI AND NON-AGARICOID BASIDIOMYCETOUS MACROMYCETES OF THE FALKLANDS

2012 ◽  
Vol 69 (2) ◽  
pp. 219-238 ◽  
Author(s):  
R. Watling
Keyword(s):  
Southern Hemisphere ◽  
Ectomycorrhizal Fungi ◽  
Falkland Islands ◽  
The World ◽  
First Time

Fifty-one species of basidiomycetes are recorded from the Southern Atlantic archipelago of the Falkland Islands. Several other fungi are discussed in the light of these findings. Some of these fungi are recorded for the first time from the Falklands and especially from some of the smaller islands of the group adjacent to West and East Falkland. The world distributions of the fungi dealt with in this compilation, particularly in the southern hemisphere, are given where they are known. Comments are made on the possible reasons for the occurrence of the species in the Falklands, especially the ectomycorrhizal taxa.

LICHENS AND LICHENICOLOUS FUNGI NEW FOR ISRAEL AND OTHER COUNTRIES

1996 ◽  
Vol 44 (2-3) ◽  
pp. 181-193 ◽  
Author(s):  
I.L. Navrotskaya ◽  
S.Y. Kondratyuk ◽  
S.P. Wasser ◽  
E. Nevo ◽  
S.D. Zelenko
Keyword(s):  
New Zealand ◽  
North America ◽  
Southern Hemisphere ◽  
Lichen Species ◽  
European Countries ◽  
General Distribution ◽  
Lichenicolous Fungi ◽  
First Time

Thirteen lichen species (Arthopyrenia punctiformis, Bactrospora patellarioides, Caloplaca saxicola, C. ulcerosa, Lempholemma chalazanellum, Lichenothelia scopularia, Maronea constans, Micarea nitschkeana, Opegrapha rufescens, O. vulgata var. subsiderella, Physcia caesia, Schismatomma pericleum, and Thelenella modesta), one nonlichenized ascomycetes (Peridiothelia fuliguncta), and 5 species of lichenicolous fungi (Arthonia molendoi, Endococcus parietinarius, Guignardia Olivieri, Opegrapha physciaria, and Zwackhiomyces coepulonus) are recorded as new for Israel. Lichenochora wasseri S.Kondr. sp. nov. from Caloplaca species from Israel and Sweden is described. Lichenochora xanthoriae is reported for the first time from Austria for Europe as well as from Auckland Islands, New Zealand, for the Southern Hemisphere. Seven taxa mentioned (Caloplaca ulcerosa, Endococcus parietinarius, Guignardia olivieri, Micarea nitschkeana, Opegrapha physciaria, Peridiothelia fuliguncta, Zwackhiomyces coepulonus) are reported here for the first time for Asia as well. Guignardia Olivieri is first reported here from some European countries (Finland, Russia, Ireland, Germany, Portugal, Italy, Ukraine), and Zwackhiomyces coepulonus from North America and Africa as well. Synonyms, references to a modern description, ecological peculiarities, locations and dates of collection in Israel, general distribution, as well as taxonomical remarks regarding the foregoing lichens and lichenicolous fungi species are given.

Redescriptions and new species in the ‘Austrosignum–Munnogonium’ complex sensu Just & Wilson (2007), mainly from the Southern Hemisphere (Crustacea: Isopoda: Paramunnidae)

Zootaxa ◽  
2021 ◽  
Vol 4952 (3) ◽  
pp. 401-447
Author(s):  
JEAN JUST ◽  
GEORGE D.F. WILSON
Keyword(s):  
New Species ◽  
Southern Hemisphere ◽  
Type Material ◽  
First Time

Type material is used to illustrate and redescribe the following species in the paramunnid Austrosignum–Munnogonium complex (classification sensu Just and Wilson 2007): Cryosignum incisum (Richardson, 1908), Cryosignum latifrons (Menzies, 1962) comb. nov., Meridiosignum kerguelensis (Vanhöffen, 1914), Munnogonium falklandicum (Nordenstam, 1933), Munnogonium globifrons (Menzies, 1962), and Munnogonium tillerae (Menzies & Barnard, 1959,—topotypes). In addition, seven new species in the complex are described, Austrosignum pilosum, Austrosignum latum, Cryosignum nordenstami, Meridiosignum convexum, Meridiosignum macquariensis, Munnogonium longicaudatum, and Tethygonium monocuspis. Boreosignum Just and Wilson, 2007 is reported from Australia for the first time as Boreosignum specimens.                Keys to species in Austrosignum, Cryosignum, Meridiosignum, Munnogonium and Tethygonium are given. A summary of distribution with a list of all species in the complex including occurrence is presented. 

Artinskian conodonts from the Dingjiazhai Formation of the Baoshan Block, west Yunnan, southwest China

2002 ◽  
Vol 76 (4) ◽  
pp. 741-750 ◽  
Author(s):  
Katsumi Ueno ◽  
Yoshihiro Mizuno ◽  
Xiangdong Wang ◽  
Shilong Mei
Keyword(s):  
Southern Hemisphere ◽  
Southwest China ◽  
Warm Water ◽  
Early Permian ◽  
Northern Margin ◽  
Stratigraphic Unit ◽  
Current Definition ◽  
Conodont Fauna ◽  
Definition Of ◽  
First Time

Permian conodonts were recovered for the first time from the Dingjiazhai Formation, a well-known diamictite-bearing stratigraphic unit in the Gondwana-derived Baoshan Block in West Yunnan, Southwest China. The conodont fauna occurs in limestone units within the upper part of the formation and consists of Sweetognathus bucaramangus (Rabe), S. whitei (Rhodes), Mesogondolella bisselli (Clark and Behnken), and an unidentified ramiform element. Based on the known stratigraphic distribution of 5. bucaramangus (Rabe), the fauna is referable to the upper Sweetognathus whitei-Mesogondolella bisselli Zone, and thus is dated as middle Artinskian according to the current definition of the stage. The Dingjiazhai Formation is overlain paraconformably by the Woniusi Formation, which is represented mostly by basalts and basaltic volcaniclastics related to rifting volcanism during the separation of the Baoshan Block from Gondwanaland. The present discovery of conodonts from the upper part of the Dingjiazhai Formation reveals that the glaciogene diamictites in the Dingjiazhai Formation are older than middle Artinskian, and the inception of rifting volcanism of the Baoshan Block is later than middle Artinskian.Occurrence of an essentially warm water element, Sweetognathus bucaramangus (Rabe), in the Dingjiazhai conodont assemblage notwithstanding, the entire fossil faunas including brachiopods and fusulinoideans from the limestone units of the formation can be best interpreted as a middle latitudinal, non-tropical, and still substantially Gondwana-influenced assemblage developed at the northern margin of Gondwanaland just after deglaciation in the southern hemisphere during Early Permian time. This time could be regarded as the beginning of the Cimmerian Region, which had mixed or transitional paleobiogeographic characteristics between the Paleoequatorial Tethyan and cool/cold Gondwanan realms, and which became well developed during Middle Permian time.

scholarly journals Contribution to the knowledge of the lichen biota of Bolivia. 5

2013 ◽  
Vol 58 (2) ◽  
pp. 697-733 ◽  
Author(s):  
Adam Flakus ◽  
Harrie J. M. Sipman ◽  
Kerstin Bach ◽  
Pamela Rodriguez Flakus ◽  
Kerry Knudsen ◽  
...  
Keyword(s):  
South America ◽  
Southern Hemisphere ◽  
New Records ◽  
Lichen Species ◽  
Critical Groups ◽  
Lichen Biota ◽  
First Time

Abstract This paper presents new records of 180 lichen species from Bolivia; 103 are new national records. Three species, Bryonora curvescens (Mudd) Poelt (also from Ecuador), Lepraria elobata Tønsberg and Pyrenula laetior Müll. Arg., are reported for the first time from the Southern Hemisphere, and five, Bathelium aff. sphaericum (C. W. Dodge) R. C. Harris, Lepraria jackii Tønsberg, Psiloparmelia arhizinosa Hale, Szczawinskia tsugae A. Funk and Trinathotrema lumbricoides (Sipman) Sipman & Aptroot, are new to South America. To complement the rather poorly recognized distribution of some species, five of the taxa reported here are also new to Ecuador. Notes on distribution and chemistry are provided for most species, and some, especially those belonging to taxonomically critical groups, are discussed in greater detail.

scholarly journals Changes in cannabis potency and first-time admissions to drug treatment: a 16-year study in the Netherlands

2018 ◽  
Vol 48 (14) ◽  
pp. 2346-2352 ◽  
Author(s):  
Tom P. Freeman ◽  
Peggy van der Pol ◽  
Wil Kuijpers ◽  
Jeroen Wisselink ◽  
Ravi K. Das ◽  
...  
Keyword(s):  
The Netherlands ◽  
Drug Treatment ◽  
Time Dependent ◽  
Time Lags ◽  
Linear Regression Models ◽  
Treatment Data ◽  
Treatment Entry ◽  
Positive Time ◽  
First Time ◽  
Ongoing Monitoring

AbstractBackgroundThe number of people entering specialist drug treatment for cannabis problems has increased considerably in recent years. The reasons for this are unclear, but rising cannabis potency could be a contributing factor.MethodsCannabis potency data were obtained from an ongoing monitoring programme in the Netherlands. We analysed concentrations of δ-9-tetrahydrocannabinol (THC) from the most popular variety of domestic herbal cannabis sold in each retail outlet (2000–2015). Mixed effects linear regression models examined time-dependent associations between THC and first-time cannabis admissions to specialist drug treatment. Candidate time lags were 0–10 years, based on normative European drug treatment data.ResultsTHC increased from a mean (95% CI) of 8.62 (7.97–9.27) to 20.38 (19.09–21.67) from 2000 to 2004 and then decreased to 15.31 (14.24–16.38) in 2015. First-time cannabis admissions (per 100 000 inhabitants) rose from 7.08 to 26.36 from 2000 to 2010, and then decreased to 19.82 in 2015. THC was positively associated with treatment entry at lags of 0–9 years, with the strongest association at 5 years, b = 0.370 (0.317–0.424), p < 0.0001. After adjusting for age, sex and non-cannabis drug treatment admissions, these positive associations were attenuated but remained statistically significant at lags of 5–7 years and were again strongest at 5 years, b = 0.082 (0.052–0.111), p < 0.0001.ConclusionsIn this 16-year observational study, we found positive time-dependent associations between changes in cannabis potency and first-time cannabis admissions to drug treatment. These associations are biologically plausible, but their strength after adjustment suggests that other factors are also important.

Pingos in Antarctica

1983 ◽  
Vol 20 (1) ◽  
pp. 105-109 ◽  
Author(s):  
John Pickard
Keyword(s):  
Lake Sediments ◽  
Southern Hemisphere ◽  
Closed System ◽  
Climatic Conditions ◽  
Apparent Absence ◽  
Vestfold Hills ◽  
Water Saturated ◽  
First Time

AbstractPingos, or ice-cored mounds, are described for the first time from Antarctica and for the first time on ice-cored moraine. Seven pingos up to 4 m high and 12 m in diameter occur on former dering of lakes on the moraine exposes water-saturated sediments to freezing and consequent lake sediments on Flanders Moraine, Vestfold Hills, Antarctica (68°40'S 78°00'E). Lateral wandering formation of closed-system pingos. The pingos are probably only a few hundred years old. The apparent absence of pingo scars in the Southern Hemisphere may be due to lack of suitable substrates, rather than to unsuitable climatic conditions.

New Zealand exports: Pseudosphaeroma Chilton, 1909 (Isopoda: Sphaeromatidae), a Southern Hemisphere genus introduced to the Pacific coast of North America

Zootaxa ◽  
2008 ◽  
Vol 1908 (1) ◽  
pp. 51-56 ◽  
Author(s):  
NIEL L. BRUCE ◽  
REGINA WETZER
Keyword(s):  
New Zealand ◽  
North America ◽  
Southern Hemisphere ◽  
San Francisco ◽  
Coastal Waters ◽  
Pacific Coast ◽  
First Record ◽  
The Pacific ◽  
First Time ◽  
Coast Region

Collections made along the coast of California have revealed the presence of a species of Pseudosphaeroma Chilton, 1909, a genus common in New Zealand coastal waters. The genus is entirely Southern Hemisphere in distribution, and this record reports the introduction of a species of Pseudosphaeroma into the San Francisco and Central Coast region of California, the first reported occurrence of the genus as an invasive taxon, and the first record of the genus from the Northern Hemisphere. The genus is also recorded for the first time from the Galapagos and Argentina.

scholarly journals A Contribution to the Lichen Family Graphidaceae (Ostropales, Ascomycota) of Bolivia. 2

2014 ◽  
Vol 59 (1) ◽  
pp. 85-96 ◽  
Author(s):  
Ulf Schiefelbein ◽  
Adam Flakus ◽  
Harrie J. M. Sipman ◽  
Martin Kukwa ◽  
Magdalena Oset
Keyword(s):  
South America ◽  
Southern Hemisphere ◽  
Tropical Forests ◽  
New Records ◽  
The Family ◽  
First Time

Abstract Microlichens of the family Graphidaceae are important components of the lowland and montane tropical forests in Bolivia. In this paper we present new records for 51 taxa of the family in Bolivia. Leiorreuma lyellii (Sm.) Staiger is reported as new for the Southern Hemisphere, while Diploschistes caesioplumbeus (Nyl.) Vain., Graphis daintreensis (A. W. Archer) A. W. Archer, G. duplicatoinspersa Lücking, G. emersa Müll. Arg., G. hossei Vain., G. immersella Müll. Arg. and G. subchrysocarpa Lücking are new for South America. Thirty taxa are reported for the first time from Bolivia. Notes on distribution are provided for most species.

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