The neutron-star X-ray transient XTE J1701-462 was observed for ∼3 Ms with RXTE during its 2006-2007 outburst. Here we report on the discovery of three type-I X-ray bursts from XTE J1701462. They occurred as the source was in transition from the typical Z-source behavior to the typical atoll-source behavior, at ∼ 10% of the Eddington luminosity. The first burst was detected in the Z-source flar...

Many rural communities in the Nigeria Delta Region have been exposed to the flaring of Associated (AG) gas due to increased extraction of petroleum in the area. The study aimed at assessing the effect of gas flaring on the built environment using buildings as the main observed objects. Two rural communities (Obrikom and Omoku) were used for the case-control study. The study, carried out within ...

The disposal of associated gases through flaring has been a major problem for the Nigerian oil and gas industries and most of theses gases are flared due to the lack of commercial out lets. The resultant effects of gas flaring are the damaging effect of the environment due to acid rain formation, green house effect, global warming and ozone depletion. This writes up is aimed at evaluating groun...

Abstract Spectroscopic observations in X-ray wavelengths provide excellent diagnostics of the temperature distribution solar flare plasma. The Solar Monitor (XSM) on board Chandrayaan-2 mission provides broadband disk-integrated soft spectral measurements energy range 1–15 keV with high resolution and time cadence. In this study, we analyze spectra three representative GOES C-class flares obtai...

Magnetic flux ropes (MFRs) play an important role in high-energetic events like solar flares and coronal mass ejections the atmosphere. Importantly, observations suggest association of some flaring with quadrupolar magnetic configurations. However, formation subsequent evolution MFRs such configurations still need to be fully understood. In this paper, we present idealized magnetohydrodynamics ...

Abstract While solar flares are predominantly characterized by an intense broadband enhancement to the radiative output, certain spectral lines and continua will, in theory, exhibit flare-induced dimmings. Observations of transitions orthohelium He i ? 10830 Å D3 have shown evidence such dimming, usually followed enhanced emission. It has been suggested that nonthermal collisional ionization he...

Six cases of fast radio bursts (FRBs) have recently been discovered. The FRBs are bright (∼0.1–1 Jy) and brief (∼1 ms) pulses of radio emission with dispersion measures (DMs) that exceed Galactic values, and hence FRBs have been interpreted to be at cosmological distances. We propose, instead, that FRBs are rare eruptions of flaring main-sequence stars within ∼1 kpc. Rather than associating the...

The simultaneous presence of a strong quasi periodic oscillation of period ∼10 seconds in the optical and X-ray lightcurves of the X-ray transient XTE J1118+480 suggests that a significant fraction of the optical flux originates from the inner part of the accretion flow, where most of the X-rays are produced. We present a model of magnetic flares in an accretion disc corona where thermal cyclo-...

We analyze multiple-wavelength observations of a two-ribbon flare exhibiting apparent expansion motion of the flare ribbons in the lower atmosphere and rising motion of X-ray emission at the top of newly-formed flare loops. We evaluate magnetic reconnection rate in terms of VrBr by measuring the ribbon-expansion velocity (Vr) and the chromospheric magnetic field (Br) swept by the ribbons. We al...

We present Very Large Array observations of twelve bona-fide and candidate brown dwarfs in the Solar neighborhood. The observed sources were chosen to cover a wide range of physical characteristics — spectral type, rotation, age, binarity, and X-ray and Hα activity — to determine the role of these properties in the production of radio activity, and hence magnetic fields. Three of the twelve sou...