L. Burderi | Università degli Studi di Cagliari (original) (raw)

Papers by L. Burderi

International Astronomical Union Colloquium

We analyzed RXTE data from the burst of the year 2000 of the X-ray millisecond binary pulsar SAX ... more We analyzed RXTE data from the burst of the year 2000 of the X-ray millisecond binary pulsar SAX J 1808.4-3658 with the intent of determining the new orbital parameters.We used the observations of SAX J1808.4-3658 performed by the Rossi X-Ray Timing Explorer (RXTE) when the source was again detected in outburst during the period January-March 2000 (Wijnands et al. 2001). In particular we examined the data from the Proportional Counter Array (РСA) (Jahoda et al. 1996). We first applied barycentric correction to the data using the optical coordinates of the source (Roche et al. 98).

AIP Conference Proceedings, 2005

AIP Conference Proceedings, 2008

We have carried out a search for radio pulsed emission from the Accreting Millisecond X-ray pulsa... more We have carried out a search for radio pulsed emission from the Accreting Millisecond X-ray pulsars (AMXPs) XTE J0929-314, XTE J1751-305 and XTE J1814-338 at 6.5 and 8.5 GHz, observed during their X-Ray quiescent phase. The detection of radio signals, in the quiescent phase of this kind of transient systems, would give a ultimate proof of the recycling model, unambiguously

AIP Conference Proceedings, 2008

... While being suitable to explain effects like the one seen in 2002 outburst of SAX J1808.4-365... more ... While being suitable to explain effects like the one seen in 2002 outburst of SAX J1808.4-3658 [2] (Riggio et al., in preparation), this model can ... 1, R, Wijnands, M, van der Klis, Nature, 394, 344 (1998) 2, L, Burderi, T, Di Salvo, M, T, Menna, A, Riggio, A, Papitto,Astrophys.J., 653 ...

Chinese Journal of Astronomy and Astrophysics, 2003

ABSTRACT By analyzing the observations performed by RXTE from 2011-08-13 to 2011-08-16 (ObsId. 96... more ABSTRACT By analyzing the observations performed by RXTE from 2011-08-13 to 2011-08-16 (ObsId. 96435-01-01-00; 96435-01-02-00; 96435-01-02-01, summing up an exposure of 132 ks) of the newly discovered Accreting millisecond pulsar, IGR J17498-2921 (ATel #3551, #3555, #3556, #3558, #3559, #3560, #3561), we propose the following preliminary solution for the, assumed circular, NS orbital motion:

ABSTRACT We report on an XMM-Newton Director Discretionary Time ToO observation of the newly disc... more ABSTRACT We report on an XMM-Newton Director Discretionary Time ToO observation of the newly discovered Accreting Millisecond Pulsar IGR J17511-3057 (ATEL #2196, #2197, #2198, #2199, and #2215) during its ongoing outburst. XMM-Newton spotted the source for 70 ks starting on 2009 Sep 21.01. The EPIC MOS1 camera, operated in Small Window mode, allowing a precise estimate of the source position: RA = 17 51 08.55 DEC = -30 57 41.7 affected by an uncertainty of 1.1 arcsec.

ABSTRACT Following the source brightening reported in ATel #2608, a monitoring campaign of Cir X-... more ABSTRACT Following the source brightening reported in ATel #2608, a monitoring campaign of Cir X-1 has begun, involving observations of RXTE (ATel #2643) and SWIFT (ATel #2650, ATel #2651). The detections of type I X-ray bursts by RXTE (ATel #2643), from the 1 deg field of view around the position of Cir X-1, strongly suggested the identification of a neutron star as the compact object in this peculiar binary system.

Taking advantage from the precise source position given by Chandra (ATEL #2215), we report here r... more Taking advantage from the precise source position given by Chandra (ATEL #2215), we report here refined orbital parameters of the newly discovered Accreting Millisecond Pulsar IGR J17511-3057 (ATEL #2196, #2197, #2198, #2215, #2216). We have analysed the RXTE(PCA) public observations (Full and pseudo-production Data, http://heasarc.gsfc.nasa.gov/docs/xte/SOF/SOF_data_hp.html ) available up to date and spanning from 2009 Sep 13 to 2009 Sep 26.

We did not detect the Millisecond X-ray Pulsar SWIFT J1756.9-2508 (ATel #1105, #1107, #1108, #111... more We did not detect the Millisecond X-ray Pulsar SWIFT J1756.9-2508 (ATel #1105, #1107, #1108, #1111, #1114, #1117) during an observation performed on June 26, 2007 (08:55 to 19:00 UT) at the Australia Telescope Compact Array (ATCA) under the TOO proposal CX136. We used array configuration 6C, a central frequency of 8.7 GHz, a bandwidth of 256 MHz, and observed for