ASI Science Data Center

DC2 Catalog ResultsCarlotta Pittori

GLAST DC2: 55 days worth of realistic simulated data

DC2 analysis group @ ASDC:

• Paolo Giommi (ASDC director)

• Elisabetta Cavazzuti, Sara Cutini, Dario Gasparrini, Carlotta Pittori

To-Do: from the Blazars and other AGN Confluence page:

Blazar catalog, sample definition

Once the list of GLAST sources is available, three steps are foreseen:

a) A source subset will readily be associated with known sources (e.g. blazars from existing catalogs);

b) Some new GLAST sources will be identified via cross-correlation with radio, X-ray... catalogs.The candidate optical counterparts will be observed. The spectroscopy will confirm their identity as a blazar, and lead to the redshift and luminosity determination.

c) Some information about the blazar contents of the remaining subset can be obtained by statistical studies.

• GLAST DC2 source catalog integrated in the ASDC database system

• Cross correlations of all DC2 sources with the ASDC blazars catalogue and with 3EG sources

• Cross correlations with other local and web-accessed radio, infrared, optical and X-ray data, including Pulsars, SNR, X-ray Binaries and Galaxy Clusters catalogues

• DC2 source identification

• Blazar spectral studies

• Interactive DC2 source catalog web page created @ ASDC:

http://www.asdc.asi.it/glast/dc2cat/

Work done and work in progress @ ASDC

(latest addition)

(see our suggestion to David)

Some ASDC cross correlation details:

• cross all with egret cat with rad=60’

• cross all with blazar cats in the ASDC database with rad=15’

• cross with WMAP cat with rad=60’ only for not yet identified sources

• 1st cross with radio NVSS rad =5’ , flux >100 mJy

• cross with pulsar cat with rad=15’

• cross with snr ASCA cat rad=30’, f >30mJy

• 2nd cross with radio NVSS and SUMS rad =30’ , flux >30 mJy (stronger source selected in case of multiple choice)

• others (xrb cat, clusters cat, ...)

In the SEDs we interactively included:

• optical data from sloan and gsc2 with rad=0,25’

• infrared data from 2mass with rad=0,25’

ASDC results:(55 days) DC2 catalog v1

Total of 380 sources 71 with |b|<10º, 309 with |b| >10°

Cross-correlation results:(205/380 with EGRET counterpart)

• 118 AGN: – 34 BL Lacs (20 with 3EG cntrp)

(not including BL Lac)– 84 FSRQs (63 with 3EG cntrp)

• 32 Pulsars/SNR – 11 radio Pulsars – 21 SNR (some spurious?)

• 4 radio galaxies (including CenA) • 3 “GRB”? (including 1 solar flare?)

• 220 unidentified (96 with 3EG cntrp)• 3 others (2 starburst gal.+1 QSO steep)

Total of 271 sources80 with |b|<10º, 181 with |b| >10°

• 93 AGN: – 66 high-conf. Blazars – 27 candidate AGN

• 5 Pulsars• 1 radio galaxy (CenA) • 1 solar flare• 170 unidentified

3EG catalog(4 years)

Source name 3EG name DC2 v1 name

0208-512 J0210-5055 MRF0294

PKS 0528+134 J0530-1323 MRF0194

0827+243 J0829+2413 MRF0264

Mrk 421 J1104+3809 MRF0404

3C 273 J1229+0210 MRF0409

3C 279 J1255-0549 MRF0253

1406-076 J1409-0745 MRF0224

PKS 1622-297 J1625-2955 MRF0362

1633+383 J1635+3813 MRF0258

NRAO 530 J1733-1313 MRF0020

3C 454.3 J2254+1601 MRF0293

LSI +61 303 J0241+6103 MRF0044

Mrk 501 MRF0257

W Com J1222+2841 MRF0234

1ES 1959+650 (TeV Blazar) MRF0012

1ES 2344+514 (TeV Blazar) MRF0351

H 1426+428 (TeV Blazar) MRF0240

PSK 2155-304 (TeV Blazar) J2158-3023 MRF0330

“Preliminary list of monitored sources”:

Sub-sample of 18 selected sources mentioned in the Year 1 data release plan

Blazar Group F-to-F Meeting, March 04

For this sub-sample of 18 selected sources, we quickly provided access to a set of Standard Products: Image, Count Map, XSPEC generated spectrum and unfolded spectrum, as well as LC (by B. Lott) and Likelihood spectral fits (by L. Reyes). We also provided the source SED, with and without DC2 simulated data.

Interactive page which allows to:

• perform your own web searches around DC2 sources

• get interactive MW data access

(purple stars=DC2 data)MRF0224

Two examples of FSRQ SEDs including DC2 simulated data (see Cutini/Gasparrini talk):

MRF0294

PKS 0208-51 1JY1406-076

Same work done for the 18-blazars sample has been extended to the entire subsample of FSRQ (~ 60 sources) and BLLacs (~ 20 sources) with an EGRET counterpart:

• Image

• Count Map• Fitted spectra with bkgr subtraction (galactic and extragalactic)• SED with and without DC2 Data

XSPEC folded model spectrum

FSRQ (84 sources) BL Lacs (34 sources)Spectral index

Redshift

STAT

(8 BL Lacs with redshift unknown)

On the left: distribution of the distances from the counterpart for all DC2 sources identified as AGNs within 1 degree.On the right: distribution of the distances between DC2 source positions and brightest radio-sources (>30 mJy) within 30 arcmin.

Latest addition: integration of the Perugia Wavelet DC2 catalog (G. Tosti talk)

at ASDC http://www.asdc.asi.it/glast/gino_dc2

-80°< dec <+80°650 sources, 303 in common with DC2 catalog v1

Cross-correlation results:• 39 BL Lacs (34 in DC2 catalog v1) including BL Lac itself!• 90 FSRQs (84 in DC2 catalog v1)• 56 Pulsars/SNR (32 in DC2 catalog v1) • 457 unidentified (220 in DC2 catalog v1)

Some sources in the Galactic plane may be spurious?

Link to the Perugia DC2 Wavelet catalog integrated at ASDC:

VERY PRELIMINARY: LogN-LogS

DC2 MRF Source Cat v1 Wavelet PG Cat

(135 MRF sources bii>30°) (154 PGW sources bii>30°)

3/2 euclidean slope3/2 euclidean slope

• Residual (particle) background subtraction at low (<100 MeV) and high (>10 GeV) energies (empirical cube by Riccardo Rando?)

• Estimate of gamma-ray flux from microwave (94Ghz) data for FSRQ

• XRB and low latitude gamma-ray sources studies (in collab. with P. Santolamazza, F. Verrecchia). Two candidate HMXRBs under study among DC2 sources:

– MRF0057 possibly LS 5039 at d=60’, but most probably cross correlated with a radio pulsar at d=5’ (ASDC cat preliminary choice)

– MRF0044 probably LSI +61303 at d=15’. But there is also a strong (~ 923 mJy) unidentified NVSS radio source at d=16’ (ASDC cat preliminary choice)

• Galaxy Clusters search in Abell cat (in collab. with S. Colafrancesco)

• GRBs studies (in collab. with A. Antonelli)

Work in progress at ASDC:

Thanks!

CONCLUSION: DC2 ASDC catalog

Complete yes, but how accurate? We are eager to know....

In our preliminary analysis we made multi-wavelength cross correlations based almost on simple spatial criteria. We plan to improve source identifications with algorithms based on Bayesian statistical methods.

... in the meantime we are waiting for

“The Truth Unveiled”!!