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