1 HETE-II Catalogue Filip Münz and Graziella Pizzichini for HETE team Burst statistics in

HETE GRB CatalogueSAIt meeting, Teramo ► gamma-ray detector French Gamma-ray Telescope (FREGATE): keV; ~ π FOV no localization ► position sensitive instruments Wide-Field X-ray Monitor (WXM): 2-25 keV; ~5’-10’ localizations Soft X-ray Cameras (SXC): 2-10 keV; ~40” localizations small eff. surface / sensitivity ► direct alert transmission through simple VHF stations along the equatorial trajectory (incl. Italian base at Malindi) High Energy Transient Experiment – II very small scale mission mass: 123 kg size: 89 x 66 cm (launch size)

HETE GRB CatalogueSAIt meeting, Teramo Alert distribution IASF-BO people E. Morelli F. Gianotti P. Ferrero F. Munz G. Pizzichini equatorial 625 km

HETE GRB CatalogueSAIt meeting, Teramo Detector response ► FREGATE  large FoV implies high background (with Earth occultation of sources due to fixed pointing ) ► WXM  extension to lower energies with complicated response matrix (1-D coded masks)

HETE GRB CatalogueSAIt meeting, Teramo HETE bursts and flashes ► 1292 GCN alerts ► 173 bursts ► 143 localized ► (110 within 1 hour)

HETE GRB CatalogueSAIt meeting, Teramo GRB – SN connection (030329) HETE Highlights HETE X-ray (Chandra) optical first short burst OT (050709)

HETE GRB CatalogueSAIt meeting, Teramo HETE catalog completing, verifying, mining …

HETE GRB CatalogueSAIt meeting, Teramo Catalogue structure ► Database (mySQL) with object interface (and web replication )  Numerical Python, Django, JQuery ► light-curve profiles in ASCII/FITS  procedures to load and subtract background Burst (trigger info) Alert (time of distribution) Spectral fits Band (X/gamma) Peak (times,fluence) Literature refer. Afterglow measures GCN notices Position info

HETE GRB CatalogueSAIt meeting, Teramo GRB entry ► All links on one page  to general catalogue  to GCN notices  to literature  custom notices

HETE GRB CatalogueSAIt meeting, Teramo Checking the catalogue ► correlation of different variables (160 entries)  looking for outliers

HETE GRB CatalogueSAIt meeting, Teramo Correlations ► Extension of Amati relation

HETE GRB CatalogueSAIt meeting, Teramo Afterglows Many bursts have good coverage of optical afterglows Many bursts have good coverage of optical afterglows Combining with analysis of prompt lightcurves Combining with analysis of prompt lightcurves

HETE GRB CatalogueSAIt meeting, Teramo Success of followups ► highlights ► GRB B (690/488) ► GRB (178/123) ► GRB (77/67) result of ground-obs. friendly (anti-solar) HETE pointing too many bursts in SWIFT era (until 2007)

HETE GRB CatalogueSAIt meeting, Teramo Prompt emission ► FREGATE analysis in 4 spectral bands  time sampling at cca 0.1 s  conversion to physical units using off-axis angle and spectral shape ► spectrum fitted in 69 cases

HETE GRB CatalogueSAIt meeting, Teramo Lightcurve analysis trying to extract more detailed information besides T90/fluence trying to extract more detailed information besides T90/fluence developing methods for identification of peaks developing methods for identification of peaks  rise/fall time  variation of hardness ratio

HETE GRB CatalogueSAIt meeting, Teramo Lightcurve parade

HETE GRB CatalogueSAIt meeting, Teramo Lightcurve analysis Sometimes the main structure comes with considerable delay (no background information after the burst) Sometimes the main structure comes with considerable delay (no background information after the burst)

HETE GRB CatalogueSAIt meeting, Teramo Lightcurve analysis in some cases the baseline level is not evident at all! in some cases the baseline level is not evident at all! aim is to verify the catalogued values and deepen the understanding of X-ray rich events aim is to verify the catalogued values and deepen the understanding of X-ray rich events

HETE GRB CatalogueSAIt meeting, Teramo Work in progress ► make catalogue ready for public  checking outliers  linking the literature  polishing the interface ► prompt emission studies  more detailed statistics  comparison with other datasets (BATSE, Swift) ► need for robust peak-analysis technique ► better pseudo-redshift indicator