Page History

1

Observing schedule

Enable LAT collaboration to react in a timely way on particular objects of interest on the basis of LAT observations. Community service for HESS.

2

Observing history

Enable LAT collaboration to check if VHE exposure is present.
Helps reach conclusions on LAT science topics.

3

Tool to show visibility/sensitivity for any sky position at any time

If LAT sees something (like a flare) of interest, this tool would determine whether HESS should be notified. In addition, this information might determine whether a pointed Target of Opportunity for GLAST might include HESS.

4

Information about telescope performance/sensitivity,

Enable LAT collaboration to estimate usefulness of (any/further) VHE exposure for a particular scientific problem/approach. To be used in conjunction with the visibility tool and the response rationale in 3 - ToO.

5

TInformation Information about data formats and open-source analysis tools.

Enable LAT team to determine the best approaches for common analysis with the LAT FITS format data and FTOOLS- and ROOT-based analysis.

6

A procedure to obtain science products (lightcurves and skymaps) adapted to GLAST time and spatial resolution

Having comparable science products (e.g. in terms of rebinning) optimizes the comparison of data sets.

7

Personal point(s) of contact

For efficient working on a well-defined scientific topic (MWL data analysis, joint proposal planning, coordinated observation campaigns etc. ) a personal representative for easy, knowledgeable, and daily exchange. Topically distinguishable (via working groups?)

1

Cross-calibration

Joint approach in methodology, feasibility and application. Long term issue.

2

Notifications of observed transient events

If HESS sees a transient event LAT could decide whether this should trigger a pointed GLAST Target of Opportunity. This kind of information is traditionally shared among VHE observatories and could be useful for us as well.

3

Time sharing on HESS observations

HESS could open might consider to reserve a fraction of its observation time for GLAST-LAT initiated projects (5%? more? with AO Sept. 2007?), to be conducted as joint observations.
Possible targets: Galactic Center, high-z AGN not already on beyond the H.E.S.S. planning listcollaboration target list, variable LAT sources with hard spectra, LAT sources in extraordinary activity states, LAT source with unique/unusual GeV properties etc.

4

Coordinated observation campaigns

A specific and instantly applicable policy to request VHE observations on LAT targets. Somewhat similar to (3), but data sharing may or may not be the determining issue.
Min. goal: Back-to-back submissions from both collaborations.
Max. goal: see (3). This guarantees that at least data will be taken on a requested source, even if not ad hoc shared.

5

Upper limits or weak detections (below threshold for stand-alone publication) in regions of VHE coverage

Either individually requested or Constrain source models for LAT sources on case-by-case base or for systematic studies on the basis of an occasionally updated u.l. map to help to constrain source models for LAT sources.
If available on different timescales, also to constrain -map.
Constrain activity states for variable LAT sources .
Source identification without an "a prior" on the LAT spectrum. We don't know if there are IC-reprocessed components, distinct from LAT energetic coverage. Even sources with pronounced GeV cutoff may appearif can be issued on custom time scales.
If on case-by-case base only, a scientific hypothesis on the real or putative source's nature may govern the request.

6

Repeated monitoring of not firmly identified galactic VHE/GeV source associations unidentified galactic sources seen by both H.E.S.S. and LAT

Investigate potential variability to aid in source identifcation.

7

VHE source spectra & lightcurves

Detailed MWL modeling of a few (t.b.d.) dedicated LAT/VHE objects.

8

Extended VHE source templates

Actual data products of extended VHE-sources to be used as morphology templates in LAT high-GeV analysis and MWL modeling.