Gemma Anderson ChIcAGO Chasing the Identification of ASCA Galactic Objects.

Gemma AndersonGemma Anderson

ChIcAGOChIcAGOChChasing the asing the IIdentifidentificcation of ation of AASCASCA GGalactic alactic OObjectsbjectsChChasing the asing the IIdentifidentificcation of ation of AASCASCA GGalactic alactic OObjectsbjects

2-10 keV log N - log S relation measured in the Galactic Plane

Hands et al. (2004)

Identification ProcessCompact

(Un-resolved) ASCA Sources

Compare source position with existing optical and infrared surveys

2MASS, DSS, GLIMPSE

Sub-arc second localisation with

Chandra

Counterpart

Source Identified

-- Soft X-rays from nearby star

-- Hard X-rays from highly absorbed massive star

-- AGN, HMXBNo Counterpart

-- Usually hard X-ray sources

Image deeply in the NIR (PANIC instrument on Magellan)

Counterpart

No Counterpart

Deeper O/IR observations with larger telescopes, colour statistics, X-ray timing analysis

Requires Further follow-up

http://objekty.astro.cz/galaxie/sondy/chandra/chandra.html

Obtain optical spectra of counterpart

Image deeply in the optical (IMACS instrument on Magellan)

Counterpart No optical Counterpart

Obtain optical spectra (IMACS)

Obtain infrared spectra (OSIRIS on SOAR)

-- Possible PSR, magnetar, AGN, PWN

Source IdentifiedCounterpart or

No Counterpart

-- Possible CV, CWB, X-ray binary, AGN, Massive star

statistically identified

Multi-wavelength Investigation of

AX J163252-4746

Multi-wavelength Investigation of

AX J163252-4746

Multi-wavelength Investigation of AX J163252-4746

Multi-wavelength Investigation of AX J163252-4746

AX J163252-4746 a WR-WR binary?

AX J163252-4746 a WR-WR binary?

AX J163252-4746 a WR-WR colliding-wind binary

AX J163252-4746 a WR-WR colliding-wind binary

AX J162246-4946 a candidate Pulsar Wind Nebula

AX J162246-4946 a candidate Pulsar Wind Nebula

AX J184447-0305 another candidate

Pulsar Wind Nebula

AX J184447-0305 another candidate

Pulsar Wind Nebula