2015A&A...582A..67A

Query : 2015A&A...582A..67A

2015A&A...582A..67A - Astronomy and Astrophysics, volume 582A, 67-67 (2015/10-1)

Very high-energy γ-ray observations of novae and dwarf novae with the MAGIC telescopes.

AHNEN M.L., ANSOLDI S., ANTONELLI L.A., ANTORANZ P., BABIC A., BANERJEE B., BANGALE P., BARRES DE ALMEIDA U., BARRIO J.A., BECERRA GONZALEZ J., BEDNAREK W., BERNARDINI E., BIASUZZI B., BILAND A., BLANCH O., BONNEFOY S., BONNOLI G., BORRACCI F., BRETZ T., CARMONA E., CAROSI A., CHATTERJEE A., CLAVERO R., COLIN P., COLOMBO E., CONTRERAS J.L., CORTINA J., COVINO S., DA VELA P., DAZZI F., DE ANGELIS A., DE CANEVA G., DE LOTTO B., DE ONA WILHELMI E., DELGADO MENDEZ C., DI PIERRO F., DOMINIS PRESTER D., DORNER D., DORO M., EINECKE S., EISENACHER GLAWION D., ELSAESSER D., FERNANDEZ-BARRAL A., FIDALGO D., FONSECA M.V., FONT L., FRANTZEN K., FRUCK C., GALINDO D., GARCIA LOPEZ R.J., GARCZARCZYK M., GARRIDO TERRATS D., GAUG M., GIAMMARIA P., GODINOVIC N., GONZALEZ MUNOZ A., GUBERMAN D., HANABATA Y., HAYASHIDA M., HERRERA J., HOSE J., HRUPEC D., HUGHES G., IDEC W., KELLERMANN H., KODANI K., KONNO Y., KUBO H., KUSHIDA J., LA BARBERA A., LELAS D., LEWANDOWSKA N., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ M., LOPEZ-COTO R., LOPEZ-ORAMAS A., LORENZ E., MAJUMDAR P., MAKARIEV M., MALLOT K., MANEVA G., MANGANARO M., MANNHEIM K., MARASCHI L., MARCOTE B., MARIOTTI M., MARTINEZ M., MAZIN D., MENZEL U., MIRANDA J.M., MIRZOYAN R., MORALEJO A., NAKAJIMA D., NEUSTROEV V., NIEDZWIECKI A., NIEVAS ROSILLO M., NILSSON K., NISHIJIMA K., NODA K., ORITO R., OVERKEMPING A., PAIANO S., PALACIO J., PALATIELLO M., PANEQUE D., PAOLETTI R., PAREDES J.M., PAREDES-FORTUNY X., PERSIC M., POUTANEN J., PRADA MORONI P.G., PRANDINI E., PULJAK I., REINTHAL R., RHODE W., RIBO M., RICO J., RODRIGUEZ GARCIA J., SAITO T., SAITO K., SATALECKA K., SCAPIN V., SCHULTZ C., SCHWEIZER T., SILLANPAEAE A., SITAREK J., SNIDARIC I., SOBCZYNSKA D., STAMERRA A., STEINBRING T., STRZYS M., TAKALO L., TAKAMI H., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESCARO D., TESHIMA M., THAELE J., TORRES D.F., TOYAMA T., TREVES A., VERGUILOV V., VOVK I., WILL M., ZANIN R., DESIANTE R. and HAYS E.

Abstract (from CDS):

In the last five years the Fermi Large Area Telescope (LAT) instrument detected GeV γ-ray emission from five novae. The GeV emission can be interpreted in terms of an inverse Compton process of electrons accelerated in a shock. In this case it is expected that protons in the same conditions can be accelerated to much higher energies. Consequently they may produce a second component in the γ-ray spectrum at TeV energies. We aim to explore the very high-energy domain to search for γ-ray emission above 50GeV and to shed light on the acceleration process of leptons and hadrons in nova explosions. We have performed observations, with the MAGIC telescopes of the classical nova V339 Del shortly after the 2013 outburst; optical and subsequent GeV γ-ray detections triggered the MAGIC observations. We also briefly report on VHE observations of the symbiotic nova YY Her and the dwarf nova ASASSN-13ax. We complement the TeV MAGIC observations with the analysis of contemporaneous Fermi-LAT data of the sources. The TeV and GeV observations are compared in order to evaluate the acceleration parameters for leptons and hadrons. No significant TeV emission was found from the studied sources. We computed upper limits on the spectrum and night-by-night flux. The combined GeV and TeV observations of V339 Del limit the ratio of proton to electron luminosities to Lp≲0.15 Le.

Abstract Copyright: ∼

Journal keyword(s): novae, cataclysmic variables - gamma rays: stars - binaries: general - stars: activity

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6188 1
2 V* V959 Mon No* 06 39 38.5986803977 +05 53 52.878876073           ~ 158 0
3 V* V1369 Cen No* 13 54 45.3506993424 -59 09 04.093260192   15.5   15.1   ~ 79 0
4 V* V1324 Sco No* 17 50 53.9093841216 -32 37 21.090962028           ~ 90 0
5 V* V745 Sco Sy* 17 55 22.2260994408 -33 14 58.551839808     17.987   13.353 M2/M6IIIe 241 1
6 ASASSN -13ax CV* 18 00 05.8773234663 +52 56 32.661521394           ~ 6 0
7 EM* AS 297 Sy* 18 14 34.1920736832 +20 59 21.189578820     11.10     M2pev 146 0
8 V* V5668 Sgr No* 18 36 56.827920 -28 55 39.97524       16.028   ~ 117 0
9 V* V339 Del No* 20 23 30.6864752010 +20 46 03.777415270   17.50 16.86     ~ 203 0
10 EM* AS 453 Sy* 21 02 09.8189024184 +45 46 32.733603228   16.04 14.68 11.38   Mep 309 0
11 V* OS And No* 23 12 05.76 +47 28 19.7           ~ 105 0

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