New Galactic Center X-ray Transient Detected by Swift: SWIFT J174540.7-290015


(Above: Crow. Ok… I get it? You can stop laughing now, you damn bird. Makes me wanna eat you even more!!)

Well… One must admit when one has jumped the gun, and I may have been a tiny bit premature with my last post?? Maybe?

Hell. You can’t blame me! Just read a couple posts here and look at my friggin banner! I’ve been expecting this galactic ‘guest’ to arrive for a while and…. (sigh)

After looking at all of the differing scientific disciplines showing an event on the scale of coalescence @ GC occurring within the timespan of 26,776 years… the same length of time it takes light to reach Earth from GC… the coincidence of orbital period of G2 being the same length in time we could look back to the little ice age occurring… the melting of the glaciers at the end of the last ice age happening 13,388 years ago… an extinction event NOW AND 26,776 years ago(this one being much larger, though)…

When one looks at the model of a GRB, and sees the 3 distinct waves… effect cannot come before cause, yes I’ve heard that. But on a quantum scale these things can occur simultaneously, and one observer involved within the event would not be able to see the connection due to the restraints placed on the human mind by the laws of relativity. It’s a stretch, yes I know! It’s such a tantalizing puzzle. It happened. It IS happening. It also WILL happen. All facts. BOOM!! The cause is the final piece. We know what the puzzle looks like. The last piece won’t change the puzzle.

So, you can see how one confused soul may jump to conclusions when he should be doing the fucking laundry and not playing astrophysical theorist!

Below is the Atel from the SWIFT team, found at astronomers

Keep your head UP!!


New Galactic Center X-ray Transient Detected by Swift: SWIFT J174540.7-290015

ATel #8649; Mark Reynolds (Michigan), Jamie Kennea (Penn State), Nathalie Degenaar (Cambridge), Rudy Wijnands (Amsterdam), Jon Miller (Michigan) on behalf of a larger collaboration.
on 7 Feb 2016; 20:04 UT
Credential Certification: Mark Reynolds (

Subjects: Radio, Infra-Red, X-ray, Request for Observations, Binary, Neutron Star, Soft Gamma-ray Repeater, Transient

We report on our ongoing Swift monitoring observations of the Galactic center (Degenaar et al. 2015). In the first Swift observation after the GC exited the solar constraint window, a new X-ray source is detected in a ~ 1ks observation on MJD 57424.87742 (t_start: 160206 @21:02UT), at a position of

RA (J2000): 17 45 40.74 (266.41974)
Dec (J2000): -29 00 14.7 (-29.00407)
90% Error radius: 2.2”

This lies approximately 16″ to the north of Sgr A* and the magnetar SGR J1745-29. This observation also reveals the eclipsing neutron star transient AX J1745.6-2901 (Degenaar & Wijnands 2009, 2010) to remain active over 2.5yrs since the onset of the current outburst (ATEL #5222, #5226).

Extracting a spectrum from a circular region (r=20″) centered on this source and background from an annular region 28″-37″ from the source position, we measure a net count rate of 0.50+\-0.02 ct/s. Assuming a constant column of N_H = 9.1e22 cm^-2, the resulting spectrum is equally well characterized by both a power-law (gamma=0.60+\-0.26) and blackbody (kT=2.1+0.4-0.3 keV, norm=0.9+0.4-0.3, implying an emission radius of approx. 1.2 km at 8 kpc) model. Assuming a distance of 8 kpc, the source luminosity is 7.9e35 erg/s (2 – 10 keV). The observed spectrum would favor a transient accreting neutron star or magnetar interpretation for this source. The observed spectral shape is inconsistent with that observed from a typical accreting black hole. Inspection of the source lightcurve does not reveal the presence of pulsations, though the observation was acquired in PC mode (delta_t = 2.5s), thus limiting our ability to detect rapid coherent pulsations.

We note the presence of two catalogued CXO sources in the immediate vicinity of this source.
CXOU J174540.1-290016
CXOGC J174540.0-290014

Chandra observations have determined CXOGC J174540.0-290014 to be a (very-faint) X-ray transient (Muno et al. 2005). However, at the current time, we cannot firmly associate this source with either of the above sources and as such it is possible that the detected source is a newly active Galactic center transient, which we designate SWIFT J174540.7-290015.

Follow-up observations are encouraged to determine the nature of this source.

The Swift/XRT Galactic Center monitoring campaign website can be found at:
Degenaar & Wijnands 2009, A&A 495, 547
Degenaar & Wijnands 2010, A&A 524, 69
Degenaar et al., 2015, JHEAp, 7, 137
Muno et al., 2005, ApJ 622, L113


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