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| Miscellaneous :
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Landi et al. 2012ATel 4166
:- Swift follow up
- Association with 1RXS source, USNO B1 and 2MASS objects
- R ~13, B~ 15.5, J ~11.6, H ~11.0, and K ~10.5
- X-ray spectrum: absorbed (NH(Gal) = 8.96e21 cm-2, NH(intr) ~1.1e22 cm-2) power law (Γ ~1.4)
- Location on the Galactic plane, X-ray spectral properties, and the lack of any evident
radio counterparts => Galactic nature
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Halpern 2012ATel 4240
: - Source field previously observed with Chandra
- 46.673 pulsation in all Chandra observations,
- Pulsation is also present in the Swift data although at a slightly
different period.
- Source is suggested to be a reddened HMXB
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Israel et al. 2012ATel 4241
: - Pulsations at 46.6s in the Chandra data.
- Pulsation in the Swift data, and detection of this pulse signal at
46.406s in archival (1993) Rosat data
- Preliminary period derivative of 5e-10 s/s
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Masetti et al. 2012ATel 4248
: - Optical spectroscopic observations
- Spectral continuum highly reddened, intrinsically blue with superimposed
Hα, Hβ and He I emissions at redshift zero (plus several absorption lines)
- Typical of an absorbed HMXB => HMXB nature confirmed
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Esposito et al. 2013 (MNRAS)
: - X-ray pulsations at 46.67366 s (see previous ATel)
- Optical follow up of the 2MASS counterpart with the NOT => source is a B 0-1 III-Ve with preference for
B1 Ve
- Favoured distance 4-5 kpc
- L~3e34 erg/s
- New member of class of low luminosity long orbital period persistent Be/X-ray pulsar in wide circular orbit a la X Persei
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Lutovinov et al. 2013 (Astr. Lett)
: - Archival INTEGRAL and Chandra data analysis
- Chandra position compatible with that of Swift (source quite off-axis in Chandra obs.)
- Optical position is RA=22h 53m 55.130s dec=62°ree; 43' 36.90"
- R magnitude is 13.0
- A probable Be X-ray binary with a pulsar
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Masetti et al. 2013 (A&A):
- Optical / NIR observation + spectroscopy of counterpart
- Confirm HMXB nature not a supergiant companion
- Equivalent width of Hα => Porb > 100 days
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