@article{MTMT:34418073, title = {Some statistical remarks on GRBs jointly detected by Fermi and Swift satellites}, url = {https://m2.mtmt.hu/api/publication/34418073}, author = {Pintér, Sándor and Balázs, Lajos and Bagoly, Zsolt and Tóth, László Viktor and Rácz, István and Horváth, István}, doi = {10.1093/mnras/stad3236}, journal-iso = {MON NOT R ASTRON SOC}, journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, volume = {527}, unique-id = {34418073}, issn = {0035-8711}, abstract = {We made statistical analysis of the Fermi GBM and Swift BAT observational material, accumulated over 15 years. We studied how GRB parameters (T90 duration, fluence, peak flux) that were observed by only one satellite differ from those observed by both. In the latter case, it was possible to directly compare the values of the parameters that both satellites measured. The GRBs measured by both satellites were identified using the k-nearest neighbours algorithm in Euclidean distance. In the parameter space we determined the direction in which the jointly detected GRBs differ most from those detected by only one of the instruments using linear discriminant analyses. To get the strength of the relationship between the parameters obtained from the GBM and BAT, a canonical correlation was performed. The GBM and BAT T90 distributions were fitted with a linear combination of lognormal functions. The optimal number of such functions required for fit is two for GBM and three for BAT. Contrary to the widely accepted view, we found that the number of lognormal functions required for fitting the observed distribution of GRB durations does not allow us to deduce the number of central engine types responsible for GRBs.}, keywords = {Telescopes; gamma-ray burst: general; Instrumentation: detectors; Space vehicles: instruments; fmethods: statistical}, year = {2024}, eissn = {1365-2966}, pages = {8931-8940}, orcid-numbers = {Pintér, Sándor/0000-0002-5755-7956; Bagoly, Zsolt/0000-0002-2679-7594; Tóth, László Viktor/0000-0002-5310-4212; Rácz, István/0000-0002-4595-6933; Horváth, István/0000-0002-1343-1761} } @article{MTMT:34417072, title = {Mapping the Universe with gamma-ray bursts}, url = {https://m2.mtmt.hu/api/publication/34417072}, author = {Horváth, István and Bagoly, Zsolt and Balázs, Lajos and Hakkila, Jon and Horváth, Zsuzsa and Joo, Andras Peter and Pintér, Sándor and Tóth, László Viktor and Veres, Peter and Rácz, István}, doi = {10.1093/mnras/stad3669}, journal-iso = {MON NOT R ASTRON SOC}, journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, volume = {527}, unique-id = {34417072}, issn = {0035-8711}, abstract = {We explore large-scale cosmic structure using the spatial distribution of 542 gamma-ray bursts (GRBs) having accurately-measured positions and spectroscopic redshifts. Prominent cosmological clusters are identified in both the northern and southern galactic hemispheres (avoiding extinction effects in the plane of the Milky Way) using the Bootstrap Point-Radius method. The Northern Galactic hemisphere contains a significant group of four GRBs in the redshift range 0.59 ≤ z ≤ 0.62 (with a Bootstrap probability of p = 0.012) along with the previously-identified Hercules–Corona Borealis Great Wall (in the revised redshift range 0.9 ≤ z ≤ 2.1; p = 0.017). The Southern Galactic hemisphere contains the previously-identified Giant GRB Ring (p = 0.022) along with another possible cluster of 7 − 9 GRBs at 1.17 ≤ z ≤ 1.444 (p = 0.031). Additionally, both the Hercules–Corona Borealis Great Wall and the Giant GRB Ring have become more prominent as the GRB sample size has grown. The approach used here underscores the potential value of GRB clustering as a probe of large-scale cosmic structure, complementary to galaxy and quasar clustering. Because of the vast scale on which GRB clustering provides valuable insights, it is important that optical GRB monitoring continue so that additional spectroscopic redshift measurements should be obtained.}, keywords = {methods: data analysis; methods: statistical; cosmology: observations; (cosmology:) large-scale structure of universe; (stars:) gamma-ray burst: general; (transients:) gammaray bursts}, year = {2024}, eissn = {1365-2966}, pages = {7191-7202}, orcid-numbers = {Horváth, István/0000-0002-1343-1761; Bagoly, Zsolt/0000-0002-2679-7594; Pintér, Sándor/0000-0002-5755-7956; Tóth, László Viktor/0000-0002-5310-4212; Rácz, István/0000-0002-4595-6933} } @article{MTMT:34493609, title = {Gamma-Ray Bursts' redshift distribution's dependence on their duration}, url = {https://m2.mtmt.hu/api/publication/34493609}, author = {Pintér, Sándor and Balázs, Lajos and Bagoly, Zsolt and Horváth, István}, doi = {10.31577/caosp.2023.53.4.93}, journal-iso = {CONTRIB ASTRON OBS SKALNATE PLESO}, journal = {CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO}, volume = {53}, unique-id = {34493609}, issn = {1335-1842}, abstract = {Gamma-ray bursts (GRBs) are distant, extremely energetic, short (about 0.1-1000 sec) cosmic transients, which could sample the whole observable Universe. Two of the Gamma-Ray Bursts' important properties are the duration and the distance of the burst. We analyzed these two important quantities of the phenomena. We mapped their two-dimensional distribution and explored some suspicious areas. As it is well known the short GRBs are closer than the others, hence we search for parts in the Universe where the GRBs duration differs from the others. We also analyze whether there are any areas where the redshifts are differing.}, keywords = {data analysis; GAMMA-RAY BURSTS}, year = {2023}, eissn = {1336-0337}, pages = {93-99}, orcid-numbers = {Pintér, Sándor/0000-0002-5755-7956; Bagoly, Zsolt/0000-0002-2679-7594; Horváth, István/0000-0002-1343-1761} } @article{MTMT:32977873, title = {The Spatial Distribution of Gamma-Ray Bursts with Measured Redshifts from 24 Years of Observation}, url = {https://m2.mtmt.hu/api/publication/32977873}, author = {Bagoly, Zsolt and Horváth, István and Rácz, István and Balázs, Lajos and Tóth, László Viktor}, doi = {10.3390/universe8070342}, journal-iso = {UNIVERSE-BASEL}, journal = {UNIVERSE}, volume = {8}, unique-id = {32977873}, abstract = {Gamma-ray bursts (GRBs) are the most luminous objects known: they outshine their host galaxies, making them ideal candidates for probing large-scale structure. Our aim is to determine the Spatial Two-Point Correlation Function of the GRBs with spectroscopic redshifts. We used all observations till 4 June 2021, and we also split the data according to the origin of the redshift (afterglow or host galaxy). We analyzed the possible correlation between the GRB redshift and sky position. There is only one region, called the Faraway GRB Patch, where nine distant GRBs shows deviation from the randomness with an ≈1% significance, showing that the sky and the radial component of the GRB distribution could be factorized and both can be determined independently. The GRBs’ cumulative monthly distribution was used to show that it is impossible to synthesize the Sky Exposure Function, even from the perfect observational logs. We estimated the Sky Exposure Function using the Gaussian kernel, and with the radial distribution, it was used for the estimation of the Spatial Two-Point Correlation Function. Monte Carlo simulations were used to determine the Poissonian errors. Our result shows that the current Spatial Two-Point Correlation Function estimations are consistent with zero for the full and the afterglow/host galaxy datasets.}, year = {2022}, eissn = {2218-1997}, pages = {1-16}, orcid-numbers = {Bagoly, Zsolt/0000-0002-2679-7594; Horváth, István/0000-0002-1343-1761; Rácz, István/0000-0002-4595-6933; Balázs, Lajos/0000-0003-0951-6217; Tóth, László Viktor/0000-0002-5310-4212} } @article{MTMT:32773229, title = {Does the GRB Duration Depend on Redshift?}, url = {https://m2.mtmt.hu/api/publication/32773229}, author = {Horváth, István and Rácz, István and Bagoly, Zsolt and Balázs, Lajos and Pintér, Sándor}, doi = {10.3390/universe8040221}, journal-iso = {UNIVERSE-BASEL}, journal = {UNIVERSE}, volume = {8}, unique-id = {32773229}, year = {2022}, eissn = {2218-1997}, pages = {1-12}, orcid-numbers = {Horváth, István/0000-0002-1343-1761; Rácz, István/0000-0002-4595-6933; Bagoly, Zsolt/0000-0002-2679-7594; Pintér, Sándor/0000-0002-5755-7956} } @article{MTMT:32152422, title = {Exploration of the high-redshift universe enabled by THESEUS}, url = {https://m2.mtmt.hu/api/publication/32152422}, author = {Tanvir, N. R. and Le Floc'h, E. and Christensen, L. and Caruana, J. and Salvaterra, R. and Ghirlanda, G. and Ciardi, B. and Maio, U. and D'Odorico, V. and Piedipalumbo, E. and Campana, S. and Noterdaeme, P. and Graziani, L. and Amati, L. and Bagoly, Zsolt and Balázs, Lajos and Basa, S. and Behar, E. and De Cia, A. and Valle, M. Della and De Pasquale, M. and Frontera, F. and Gomboc, A. and Gotz, D. and Horváth, István and Hudec, R. and Mereghetti, S. and O'Brien, P. T. and Osborne, J. P. and Paltani, S. and Rosati, P. and Sergijenko, O. and Stanway, E. R. and Szécsi, Dorottya and Tóth, László Viktor and Urata, Y. and Vergani, S. and Zane, S.}, doi = {10.1007/s10686-021-09778-w}, journal-iso = {EXP ASTRON}, journal = {EXPERIMENTAL ASTRONOMY}, volume = {52}, unique-id = {32152422}, issn = {0922-6435}, abstract = {At peak, long-duration gamma-ray bursts are the most luminous sources of electromagnetic radiation known. Since their progenitors are massive stars, they provide a tracer of star formation and star-forming galaxies over the whole of cosmic history. Their bright power-law afterglows provide ideal backlights for absorption studies of the interstellar and intergalactic medium back to the reionization era. The proposed THESEUS mission is designed to detect large samples of GRBs at z > 6 in the 2030s, at a time when supporting observations with major next generation facilities will be possible, thus enabling a range of transformative science. THESEUS will allow us to explore the faint end of the luminosity function of galaxies and the star formation rate density to high redshifts; constrain the progress of re-ionisation beyond z greater than or similar to 6; study in detail early chemical enrichment from stellar explosions, including signatures of Population III stars; and potentially characterize the dark energy equation of state at the highest redshifts.}, keywords = {GAMMA-RAY BURSTS; ABUNDANCES; REIONIZATION; Star forming galaxies}, year = {2021}, eissn = {1572-9508}, pages = {219-244}, orcid-numbers = {Bagoly, Zsolt/0000-0002-2679-7594; Horváth, István/0000-0002-1343-1761; Tóth, László Viktor/0000-0002-5310-4212} } @article{MTMT:31472851, title = {The clustering of gamma-ray bursts in the Hercules–Corona Borealis Great Wall: the largest structure in the Universe?}, url = {https://m2.mtmt.hu/api/publication/31472851}, author = {Horváth, István and Szécsi, Dorottya and Hakkila, J and Szabó, Á and Rácz, István and Tóth, László Viktor and Pintér, Sándor and Bagoly, Zsolt}, doi = {10.1093/mnras/staa2460}, journal-iso = {MON NOT R ASTRON SOC}, journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, volume = {498}, unique-id = {31472851}, issn = {0035-8711}, abstract = {The Hercules–Corona Borealis Great Wall is a statistically significant clustering of gamma-ray bursts (GRBs) around redshift 2. Motivated by recent theoretical results indicating that a maximal Universal structure size may indeed coincide with its estimated size (2–3 Gpc), we reexamine the question of this Great Wall’s existence from both observational and theoretical perspectives. Our statistical analyses confirm the clustering’s presence in the most reliable data set currently available, and we present a video showing what this data set looks like in 3D. Cosmological explanations (i.e. having to do with the distribution of gravitating matter) and astrophysical explanations (i.e. having to do with the rate of star formation over cosmic time and space) regarding the origin of such a structure are presented and briefly discussed and the role of observational bias is also discussed at length. This, together with the scientific importance of using GRBs as unique cosmological probes, emphasises the need for future missions such as the THESEUS satellite, which will provide us with unprecedentedly homogeneous data of GRBs with measured redshifts. We conclude from all this that the Hercules–Corona Borealis Great Wall may indeed be the largest structure in the Universe – but to be able to decide conclusively whether it actually exists, we need THESEUS.}, year = {2020}, eissn = {1365-2966}, pages = {2544-2553}, orcid-numbers = {Horváth, István/0000-0002-1343-1761; Rácz, István/0000-0002-4595-6933; Tóth, László Viktor/0000-0002-5310-4212; Pintér, Sándor/0000-0002-5755-7956; Bagoly, Zsolt/0000-0002-2679-7594} } @article{MTMT:31390672, title = {Kilonova rates from spherical and axisymmetrical models}, url = {https://m2.mtmt.hu/api/publication/31390672}, author = {Kóbori, József and Bagoly, Zsolt and Balázs, Lajos}, doi = {10.1093/mnras/staa1034}, journal-iso = {MON NOT R ASTRON SOC}, journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY}, volume = {494}, unique-id = {31390672}, issn = {0035-8711}, year = {2020}, eissn = {1365-2966}, pages = {4343-4348}, orcid-numbers = {Bagoly, Zsolt/0000-0002-2679-7594} } @article{MTMT:31189864, title = {Optimizing for Information Content on Ionflux Mercury Automated Patch Clamp}, url = {https://m2.mtmt.hu/api/publication/31189864}, author = {Mike, Árpád and Pesti, Krisztina and Csaba Földi, Mátyás and Bagoly, Zsolt and Papp, Gábor and Lukács, Péter}, doi = {10.1016/j.bpj.2019.11.3199}, journal-iso = {BIOPHYS J}, journal = {BIOPHYSICAL JOURNAL}, volume = {118}, unique-id = {31189864}, issn = {0006-3495}, year = {2020}, eissn = {1542-0086}, pages = {590A-591A}, orcid-numbers = {Mike, Árpád/0000-0002-9095-8161; Bagoly, Zsolt/0000-0002-2679-7594; Papp, Gábor/0000-0001-5038-678X} } @article{MTMT:30882276, title = {Transient detection capabilities of small satellite gamma-ray detectors}, url = {https://m2.mtmt.hu/api/publication/30882276}, author = {Bagoly, Zsolt and Balázs, Lajos and Galgóczi, Gábor and Ohno, Masanori and Pál, András and Ripa, Jakub and Tóth, László Viktor and Werner, Norbert}, doi = {10.1002/asna.201913675}, journal-iso = {ASTRON NACHRICH}, journal = {ASTRONOMISCHE NACHRICHTEN}, volume = {340}, unique-id = {30882276}, issn = {0004-6337}, abstract = {The new, small satellite-based gamma-ray detectors, like Cubesats Applied for MEasuring and Localizing Transients, will provide a new wa to detect gamma transients in the multimessenger era. The efficiency an the detection capabilities of such a system will be compared wit current missions, for example, Fermi Gamma-ray Burst Monitor (GBM). W used the Fermi GBM's observed short gamma-ray burst light curve aggregated from observed discrete detector event for the simulatio input. The corresponding direction-dependent detector response matrice were used to generate photon counts and light curves around a simulate event, enabling to determine the statistics. This method can be used i the future for trigger algorithm and detector system development, an also to estimate the efficiency of the data analysis pipeline regardin the observable gamma-ray bursts' parameters as well as othe electromagnetic transients}, keywords = {gamma rays: observations - instrumentation: detectors - space vehicles: instruments}, year = {2019}, eissn = {1521-3994}, pages = {681-689}, orcid-numbers = {Bagoly, Zsolt/0000-0002-2679-7594; Ripa, Jakub/0000-0003-3994-7528; Tóth, László Viktor/0000-0002-5310-4212} }