MAXI/GSC detection of a new X-ray outburst from the Be/X-ray binary pulsar H1145-619
ATel #15359; Amar Deo Chandra (IISER Kolkata)
on 3 May 2022; 05:31 UT
Credential Certification: Amar Deo Chandra (amar.deo.chandra@gmail.com)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
Referred to by ATel #: 15366
MAXI/GSC detected an outburst of the Be/X-ray binary pulsar H 1145-619 (= 4U 1145-619, V801 Cen). The one day-averaged MAXI light curve in the 2-20 keV band suggests that the enhancement in flux began from 2022 April 28 (MJD 59697), and it reached 0.078 +- 0.017 ph/s/cm^2 (20 +- 4 mCrab) on May 2 (MJD 59701). A persistent X-ray pulsar 1E 1145.1-6141 (= 3A 1145-616, V830 Cen) lies about 15.6 arcmin away from this source. H 1145-619 was detected after about 5 years of quiescence. The time interval between the onset of the current outburst and that of the previous outburst of H 1145-619 (Atel#10203, Alfonso-Garzón et al. 2017) is synchronized with the orbital period 186.5 day (Warwick et al. 1985). This suggests that the present outburst is a normal X-ray outburst of H 1145-619. On May 2 (MJD 59701), the one day-averaged 15-50 keV Swift/BAT flux has increased to 0.012 +- 0.007 ct/s/cm^2 (~55 mCrab) which is comparable to the peak flux of the normal outburst observed in 2015 March (Atel#7215).
The MAXI and Swift light curves are available at the URLs: http://maxi.riken.jp/star_data/J1148-622/J1148-622.html , http://swift.gsfc.nasa.gov/results/transients/weak/H1145-619/
