STRONG BURSTS FROM THE ANOMALOUS X-RAY PULSAR 1E 1547.0-5408 OBSERVED WITH THE INTEGRAL/SPI ANTI-COINCIDENCE SHIELD

Journal Article · Fri May 01 04:00:00 EDT 2009 · Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/696/1/L74; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21300734

Mereghetti, S; Esposito, P; Tiengo, A; Vianello, G ^[1]; Goetz, D ^[2]; Weidenspointner, G; Von Kienlin, A ^[3]; Israel, G L; Stella, L ^[4]; Turolla, R ^[5]; Rea, N ^[6]

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1. INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via E. Bassini 15, I-20133 Milano (Italy)
2. CEA Saclay, DSM/IRFU/Service d'Astrophysique, Orme des Merisiers, Bat. 709, F-91191 Gif-sur-Yvette (France)
3. Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, Postfach 1312, D-85741 Garching (Germany)
4. INAF-Osservatorio Astronomico di Roma, via Frascati 33, I-00040 Monteporzio Catone (Italy)
5. Universita di Padova, Dipartimento di Fisica, via Marzolo 8, I-35131 Padova (Italy)
6. Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Kruislaan 403, 1098SJ, Amsterdam (Netherlands)

In 2009 January, multiple short bursts of soft gamma rays were detected from the direction of the anomalous X-ray pulsar 1E 1547.0-5408 by different satellites. Here we report on the observations obtained with the Anti Coincidence Shield (ACS) of the SPI instrument on INTEGRAL during the period with the strongest bursting activity. More than 200 bursts were detected at energies above 80 keV in a few hours on January 22. Among these, two remarkably bright events showed pulsating tails lasting several seconds and modulated at the 2.1 s spin period of 1E 1547.0-5408. The energy released in the brightest of these bursts was of a few 10{sup 43} erg, for an assumed distance of 10 kpc. This is smaller than that of the three giant flares seen from soft gamma-ray repeaters (SGRs), but higher than that of typical bursts from SGRs and anomalous X-ray pulsars.

• OSTI ID: 21300734
• Journal Information: Astrophysical Journal (Online), Journal Name: Astrophysical Journal (Online) Journal Issue: 1 Vol. 696; ISSN 1538-4357
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
99 GENERAL AND MISCELLANEOUS
COSMIC GAMMA BURSTS
GAMMA RADIATION
NEUTRONS
PULSARS
SATELLITES
STARS
X RADIATION