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Altan Baykal

E-mail
altan@metu.edu.tr
Department
Department of Physics
Scopus Author ID
Comprehensive analysis of the transient X-ray pulsar MAXI J1409 619
Donmez, C. K.; Serim, Muhammed Miraç; Inam, S. C.; Sahiner, S.; Serim, D.; Baykal, Altan (Oxford University Press (OUP), 2020-08-01)
We probe the properties of the transient X-ray pulsar MAXI J1409-619 through RXTE and Swift follow-up observations of the outburst in 2010. We are able to phase-connect the pulse arrival times for the 25 d episode during t...
Pulse frequency fluctuations of magnetars
Cerri-Serim, D.; Serim, Muhammed Miraç; Sahiner, S.; Inam, S. C.; Baykal, Altan (Oxford University Press (OUP), 2019-05-01)
Using RXTE, Chandra, XMM-Newton and Swift observations, we construct the power spectra and torque noise strengths of magnetars for the first time. For some of the sources, on time-scales of months to years, we measure stro...
Dense matter with eXTP
Watts, Anna L.; Yu, WenFei; Poutanen, Juri; Zhang, Shu; Bhattacharyya, Sudip; Bogdanov, Slavko; Ji, Long; Patruno, Alessandro; Riley, Thomas E.; Bakala, Pavel; Baykal, Altan; Bernardini, Federico; Bombaci, Ignazio; Brown, Edward; Cavecchi, Yuri; Chakrabarty, Deepto; Chenevez, Jerome; Degenaar, Nathalie; Del Santo, Melania; et.al. (2019-02-01)
In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry (eXTP) mission for determining the nature of dense matter; neutron star cores host an extreme density regime which cannot be replica...
Accretion in strong field gravity with eXTP
De Rosa, Alessandra; Uttley, Phil; Gou, Lijun; Liu, Yuan; Bambi, Cosimo; Barret, Didier; Belloni, Tomaso; Berti, Emanuele; Bianchi, Stefano; Caiazzo, Ilaria; Casella, Piergiorgio; Feroci, Marco; Ferrari, Valeria; Gualtieri, Leonardo; Heyl, Jeremy; Ingram, Adam; Karas, Vladimir; Lu, FangJun; Luo, Bin; et.al. (Springer Science and Business Media LLC, 2019-02-01)
In this paper we describe the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to accretion flows in the strong field gravity regime around both stellar-mass and supermassive black-...
Observatory science with eXTP
in't Zand, Jean J. M.; Bozzo, Enrico; Qu, JinLu; Li, Xiang-Dong; Amati, Lorenzo; Chen, Yang; Donnarumma, Immacolata; Doroshenko, Victor; Drake, Stephen A.; Hernanz, Margarita; Jenke, Peter A.; Maccarone, Thomas J.; Mahmoodifar, Simin; de Martino, Domitilla; De Rosa, Alessandra; Rossi, Elena M.; Rowlinson, Antonia; Sala, Gloria; Stratta, Giulia; et.al. (2019-02-01)
In this White Paper we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission for studies related to Observatory Science targets. These include flaring stars, supernova remnants, accreting white ...
Discovery of a glitch in the accretion- powered pulsar SXP 1062
Serim, Muhammed Miraç; Sahiner, S.; Cerri-Serim, D.; İNAM, SITKI ÇAĞDAŞ; Baykal, Altan (2017-11-01)
We present timing analysis of the accretion-powered pulsar SXP 1062, based on the observations of Swift, XMM-Newton and Chandra satellites covering a time span of about 2 yr. We obtain a phase coherent timing solution that...
RXTE and Swift Observations of SWIFT J0513.4-6547
Sahiner, S.; Serim, Muhammed Miraç; Baykal, Altan; İNAM, SITKI ÇAĞDAŞ (Oxford University Press (OUP), 2016-02-11)
We present timing and spectral analysis of Swift-XRT (X-ray Telescope) and RXTE-PCA (Rossi X-ray Timing Explorer-proportional Counter Array) observations of the transient Be/X-ray pulsar SWIFT J0513.4-6547 during its outbu...
Timing studies of X Persei and the discovery of its transient quasi-periodic oscillation feature
Acuner, Z.; İNAM, SITKI ÇAĞDAŞ; Sahiner, S.; Serim, Muhammed Miraç; Baykal, Altan; Swank, J. (2014-10-11)
We present a timing analysis of X Persei (X Per) using observations made between 1998 and 2010 with the Proportional Counter Array (PCA) onboard the Rossi X-ray Timing Explorer (RXTE) and with the INTEGRAL Soft Gamma-Ray I...
RXTE and Swift observations of SWIFT J1729.9-3437
Sahiner, S.; İNAM, SITKI ÇAĞDAŞ; Serim, Muhammed Miraç; Baykal, Altan (2013-10-01)
We analyse Rossi X-ray Timing Explorer (RXTE) and Swift observations of SWIFT J1729.9-3437 after its outburst from 2010 July 20 to 2010 August 12. We calculate a spin frequency and spin frequency derivative of 1.8734(8) x ...
Noise Strength Estimates of Three SGRs: Swift J1822.3-1606, SGR J1833-0832 and Swift J1834.9-0846
Serim, Muhammed Miraç; İNAM, SITKI ÇAĞDAŞ; Baykal, Altan (2012-04-27)
We studied timing solutions of the three magnetars SWIFT J1822.3-1606, SGR J1833-0832 and Swift J1834.9-0846. We extracted the residuals of pulse arrival times with respect to the constant pulse frequency derivative. Using...