Multiwavelength and Multimessenger Observations of Blazars and Theoretical Modeling: Blazars as Astrophysical Neutrino Sources

Boettcher, Markus; Fu, Matthew; Govenor, Timothy; King, Q.; Roustazadeh, P.

doi:10.48550/arxiv.2204.12242

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Tampo et al 2023, in preparation), whereas the quiescent optical magnitude is 21.94(7) in the ¢ g band (Ahumada et al 2020). The large-amplitude outburst and detection of the initial optical spectrum dominated by a blue continuum with strong single-peaked emission lines are initially believed to indicate that this object would be a classical He/N nova (Stein et al 2021;Boettcher et al 2022). However, the object was later identified as a WZ Sge-type system, a subclass of dwarf novae (DNe) in further follow-up optical spectroscopy and photometry (Isogai et al 2021).…”

Section: Introductionmentioning

confidence: 99%

MASTER OT J030227.28+191754.5: A Dwarf Nova at a Massive Oxygen–Neon White Dwarf System?

Kimura

Kashiyama

Shigeyama

et al. 2023

ApJ

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We present timing and spectral analysis results of the NICER and NuSTAR observations of the dwarf nova MASTER OT J030227.28+191754.5 during the 2021–2022 outburst. The soft X-ray component was found to be dominated by blackbody radiation with a temperature of ∼30 eV and also showed prominent oxygen and neon emission lines. The blackbody luminosity exceeded 1034 erg s−1, which is consistent with theoretical predictions, and then decreased more than an order of magnitude in 3.5 days. The inferred abundances of oxygen and neon in the optically thin coronal region surrounding the central white dwarf (WD) are several times higher than the respective solar values. Although inconclusive, the abundance enrichment may originate from the WD, indicating that it may be mainly composed of oxygen and neon. Assuming that the blackbody radiation comes from the belt-shaped boundary layer between the WD and the accretion disk, we estimated the WD radius to be (2.9 ± 1.1) × 108 cm, which corresponds to the WD mass range of 1.15–1.34 M ⊙. If the accretion continues for another ∼1 Gyr, the WD may experience an accretion-induced collapse into a neutron star and form a so-called black widow pulsar system.

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Section: Introductionmentioning

confidence: 99%

MASTER OT J030227.28+191754.5: A Dwarf Nova at a Massive Oxygen–Neon White Dwarf System?

Kimura

Kashiyama

Shigeyama

et al. 2023

ApJ

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“…The inclusion of MeV photons in blazar SED modeling is also of great significance given the that blazars are plausible neutrino sources (IceCube Collaboration et al, 2018). Thus, Blazars are prime targets in the era of multi-messenger astronomy (Boettcher et al, 2022). It should be noted that neutrino observations require simultaneous γ-ray observations to effectively search for counterparts.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the performance of a CdZnTe-based soft gamma-ray detector for CubeSat payloads

Pal,

de Kuijper,

Diwan

et al. 2024

Preprint

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The purpose of writing this paper is: The low-energy $\gamma$-ray (0.1-30 MeV) sky has been relatively unexplored since the decommissioning of the COMPTEL instrument on the Compton Gamma-Ray Observatory (CGRO) satellite in 2000. However, the study of this part of the energy spectrum (the ''MeV gap") is crucial for addressing numerous unresolved questions in high-energy and multi-messenger astrophysics. Although several large MeV $\gamma$-ray missions like AMEGO and e-ASTROGAM are being proposed, they are predominantly in the developmental phase, with launches not anticipated until the next decade at the earliest. In recent times, there has been a surge in proposed CubeSat missions as cost-effective and rapidly implementable ''pathfinder" alternatives. A MeV CubeSat dedicated to $\gamma$-ray astronomy has the potential to serve as a demonstrator for future, larger-scale MeV payloads. This paper presents a $\gamma$-ray payload design featuring a CdZnTe crystal calorimeter module developed by IDEAS. We report the detailed results of simulations to assess the performance of this proposed payload and compare it with those of previous $\gamma$-ray instruments.

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Evaluation of the performance of a CdZnTe-based soft $$\gamma $$-ray detector for CubeSat payloads

de Kuijper,

Diwan,

Pal

et al. 2024

Exp Astron

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The low-energy $$\varvec{\gamma }$$ γ -ray (0.1-30 MeV) sky has been relatively unexplored since the decommissioning of the COMPTEL instrument on the Compton Gamma-Ray Observatory (CGRO) satellite in 2000. However, the study of this part of the energy spectrum (the “MeV gap”) is crucial for addressing numerous unresolved questions in high-energy and multi-messenger astrophysics. Although several large MeV $$\varvec{\gamma }$$ γ -ray missions like AMEGO and e-ASTROGAM are being proposed, they are predominantly in the developmental phase, with launches not anticipated until the next decade at the earliest. In recent times, there has been a surge in proposed CubeSat missions as cost-effective and rapidly implementable “pathfinder” alternatives. A MeV CubeSat dedicated to $$\varvec{\gamma }$$ γ -ray astronomy has the potential to serve as a demonstrator for future, larger-scale MeV payloads. This paper presents a $$\varvec{\gamma }$$ γ -ray payload design featuring a CdZnTe crystal calorimeter module developed by IDEAS. We report the detailed results of simulations to assess the performance of this proposed payload and compare it with those of previous $$\varvec{\gamma }$$ γ -ray instruments.

show abstract

Multiwavelength and Multimessenger Observations of Blazars and Theoretical Modeling: Blazars as Astrophysical Neutrino Sources

Cited by 5 publications

References 31 publications

MASTER OT J030227.28+191754.5: A Dwarf Nova at a Massive Oxygen–Neon White Dwarf System?

MASTER OT J030227.28+191754.5: A Dwarf Nova at a Massive Oxygen–Neon White Dwarf System?

Evaluation of the performance of a CdZnTe-based soft gamma-ray detector for CubeSat payloads

Evaluation of the performance of a CdZnTe-based soft $$\gamma $$-ray detector for CubeSat payloads

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