Kuehnel: Created page with "Category:Accreting X-ray Pulsars Also known as: IGR J17252-3616, Ginga 1722-36, SWIFT J1725.2-3617, 2XMM J172511.3-361658 [http://simbad.u-strasbg.fr/simbad/sim-basic?Id..."

2018-04-18T14:43:19Z

Created page with "Category:Accreting X-ray Pulsars Also known as: IGR J17252-3616, Ginga 1722-36, SWIFT J1725.2-3617, 2XMM J172511.3-361658 [http://simbad.u-strasbg.fr/simbad/sim-basic?Id..."

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[[Category:Accreting X-ray Pulsars]]

Also known as: IGR J17252-3616, Ginga 1722-36, SWIFT J1725.2-3617, 2XMM J172511.3-361658 [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=EXO+1722-363 SIMBAD]

'''Monitoring data''':
[http://swift.gsfc.nasa.gov/results/transients/IGRJ17252-3616/ Swift/BAT]
[http://maxi.riken.jp/top/index.php?cid=1&jname=J1725-362 MAXI]

= Coordinates =

{| class="wikitable"
| RA
| 17h 25m 11.392 s
| Dec
| -36° 15' 57.53"
|-
| RA
| 261.297467
| Dec
| -36.282647
|-
| l
| 351.4972
| b
| -0.3539
|}
= Binary system =

Distance: 8.0+2.5-2.0 kpc <ref name="Mason09" />

== Orbit ==

{| class="wikitable"
! Parameter
! Value
! Unit
! Reference
|-
| Porb
| 9.742
| days
| <ref name="ManousakisWalter11" />
|-
| T90
| 2453761.62±0.1
| HJD
| <ref name="ManousakisWalter11" />
|-
| a sin i
| 102±8
| lt-sec
| <ref name="ManousakisWalter11" />
|-
| e
| <0.15
|
| <ref name="ManousakisWalter11" />
|}
== Optical Companion ==

2MASS J17251139-3616575

Stellar type: B0-B1Ia <ref name="Mason09" />

= Available data from pointing instruments =

* '''RXTE''': 42 observations
* '''XMM-Newtown''': 10 observations with source in FOV (3-19 ks each)
* '''INTEGRAL''': Frequently covered (Galactic Centre area)
* Further data from EXOSAT, Ginga, ...

= Description =

First detected by EXOSAT as weak X-ray source in 1984 in Galactic Plane observations (<ref name="Warwick88" />).
Ginga observations found ~414 s pulsations (<ref name="Tawara89" />), a very strong absorption (NH ~ 1024) and several flares with peak intensity of ~3 mCrab in the 1–38 keV band (<ref name="Takeuchi90" />).

The source was later detected by INTEGRAL together with other hard X-ray sources in mosaics built from core programme observations [http://www.astronomerstelegram.org/?read=229 ATel 229 (9 Feb 2004)].
<ref name="Corbet05" /> found eclipses and an orbital period of 9.741±0.004 days. Subtracting for Galactic ridge contribution, they found flux variations in the 0.5–5 mCrab range. The source was proposed to be a wind-accreting neutron star. <ref name="Thompson07" /> improved the accuracy of orbital parameters from pulse timing.

INTEGRAL and XMM-Newton observations allowed a more precise determination of the source position and the identification of the infrared counterpart (<ref name="ZuritaHeras06" />). This analysis found an average flux
level of 6.4 mCrab in the 20–60 keV band, with short-term flares of up to ~67 mCrab.

<ref name="Mason09" /> obtained a spectral classification of the mass donor based on VLT observations. The group also made a preliminary estimate of the masses of both stars in the system (<ref name="Mason10" />).

[http://www.astronomerstelegram.org/?read=9412 ATel 9412 (26 Aug 2016)] reported detection of activity with MAXI
with peak fluxes of ~90 mCrab compared to a usual level of ~3 mCrab.

'''References'''

EXO 1722-363 - Revision history

Kuehnel: Created page with "Category:Accreting X-ray Pulsars Also known as: IGR J17252-3616, Ginga 1722-36, SWIFT J1725.2-3617, 2XMM J172511.3-361658 [http://simbad.u-strasbg.fr/simbad/sim-basic?Id..."