UV Detection of Accreting Millisecond Pulsar IGR J00291+5934 with Swift/UVOT
ATel #1668; F. E. Marshall (NASA/GSFC), C. B. Markwardt (U. Md./CRESST/NASA/GSFC) and D. Chakrabarty (MIT)
on 20 Aug 2008; 08:19 UT
Credential Certification: Craig B. Markwardt (craigm@lheamail.gsfc.nasa.gov)
Subjects: Optical, X-ray, Binary, Neutron Star, Transient, Pulsar
For the millisecond X-ray pulsar IGR J00291+5934 (ATEL #1660, #1664,
#1665, #1666, #1667), we report on UVOT analysis of the Swift
observation taken 2008-08-15 at 14:50 UT
(Markwardt & Swank, ATEL #1664).
IGR J00291+5934 was detected in the UVW2 filter of UVOT. The UVW2
filter has a central wavelength of 1928 Angstroms. The observed
magnitude was 19.6 +/- 0.2 in the UVOT photometric system (Poole et
al, 2008, MNRAS 383,627), uncorrected for the expected reddening,
which corresponds to E(B-V) = 0.8 (Torres et al. 2008, ApJ, 672,
1079). Comparison with contemporaneous optical measurements
(Russell et al. ATEL #1666) suggests a very blue spectrum for the
source. Further Swift observations of the source are planned.
