2007A&A...469L...5R


Query : 2007A&A...469L...5R

2007A&A...469L...5R - Astronomy and Astrophysics, volume 469, L5-8 (2007/7-1)

Swift/XRT observes the fifth outburst of the periodic supergiant fast X-ray transient IGR J11215-5952.

ROMANO P., SIDOLI L., MANGANO V., MEREGHETTI S. and CUSUMANO G.

Abstract (from CDS):

The hard X-ray transient source IGR J11215-5952 was discovered in April 2005 with INTEGRAL and is a confirmed member of the new class of high mass X-ray binaries, the supergiant fast X-ray transients (SFXTs). Archival INTEGRAL data and RXTE observations have shown that the outbursts occur with a periodicity of ∼330 days. Thus, IGR J11215-5952 is the first SFXT displaying periodic outbursts, possibly related to the orbital period. We performed a target of opportunity observation with Swift with the main aim of monitoring the source behaviour around the time of the fifth outburst, expected on 2007 Feb. 9. The source field was observed with Swift twice a day (2ks/day) starting from 2007 Feb. 4 until the fifth outburst, and then for ∼5ks a day afterwards, during a monitoring campaign that lasted 23 days for a total on-source exposure of ∼73ks. This is the most complete monitoring campaign of an outburst from an SFXT. The spectrum during the brightest flares is described well by an absorbed power law with a photon index of 1 and NH ∼1x1022cm–2. A 1-10keV peak luminosity of ∼1036erg/s was derived (assuming 6.2kpc, the distance of the optical counterpart). These Swift observations are a unique data-set for an outburst of an SFXT, thanks to the combination of sensitivity and time coverage, and they allowed a study of IGR J11215-5952 from outburst onset to almost quiescence. We find that the accretion phase lasts longer than previously thought on the basis of lower-sensitivity instruments observing only the brightest flares. The observed phenomenology is consistent with a smoothly increasing flux triggered at the periastron passage in a wide eccentric orbit with many flares superimposed, possibly due to episodic or inhomogeneous accretion.

Abstract Copyright:

Journal keyword(s): X-rays: stars - X-rays: individual: IGR J11215-5952

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 306414 s*b 11 21 46.8238550520 -59 51 47.970396396 10.12 10.69 10.23 10.00   B1Ia 147 0

Query : 2007A&A...469L...5R

Basic data :
HD 306414 -- Blue Supergiant
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
HXB (), * (1971PW&SO,HD,...), X (2XMMi,[KRL2007b]), Psr (2012ApJ), s*b (1993ApJS), gam (IGR), NIR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
11 21 46.8238550520 -59 51 47.970396396 (Optical) [ 0.0097 0.0107 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
11 19 32.6678838402 -59 35 20.324783702 [ 0.0097 0.0107 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
291.8932286107707 +01.0729154939982 [ 0.0097 0.0107 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
-5.147 2.727 [0.012 0.013 90] A 2020yCat.1350....0G
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
0.1233 [0.0123] A 2020yCat.1350....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type:
B1Ia C 1993ApJS...89..293V
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (11) :
U 10.12 [~] D 2003AJ....125.2531R
B 10.69 [0.01] E 2012yCat.1322....0Z
V 10.23 [0.01] E 2012yCat.1322....0Z
R 10.00 [0.01] D 2012yCat.1322....0Z
G 9.770652 [0.002931] C 2020yCat.1350....0G
J 8.548 [0.030] C 2003yCat.2246....0C
H 8.340 [0.036] C 2003yCat.2246....0C
K 8.185 [0.023] C 2003yCat.2246....0C
g 10.77 [0.12] D 2012yCat.1322....0Z
r 10.12 [0.06] D 2012yCat.1322....0Z
i 9.47 [0.02] D 2012yCat.1322....0Z
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (20) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 306414 GSC 08629-00942 TIC 451004619 2XMMi J112146.7-595146
ALS 2316 IGR J11215-5952 TYC 8629-942-1 [KRL2007b] 96
CD-59 3698 LLNS 4927 UCAC4 151-075107 Gaia DR2 5339047221168787712
CPD-59 3388 LS 2316 USNO-B1.0 0301-00239906 Gaia DR3 5339047221168787712
GEN# +1.00306414 2MASS J11214682-5951479 uvby98 100306414 Gaia DR1 5339047216860375040

References (147 between 1850 and 2023) (Total 147)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


distance : 1    Fe_H : 1    PLX : 2    PM : 2    MK : 4   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

HD 306414 ALS 2316 CD-59 3698 CPD-59 3388 GSC 08629-00942
LS 2316 2MASS J11214682-5951479 TYC 8629-942-1 UCAC4 151-075107 USNO-B1.0 0301-00239906
uvby98 100306414 Gaia DR2 5339047221168787712 Gaia DR3 5339047221168787712 Gaia DR1 5339047216860375040

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2023.09.30-18:41:01

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