2005 AMANDA Point Source Analysis
Simulation
Event Selection
Methodology
Sensitivity, Discovery Potential, & Systematics
Unblinding Proposal
Results
Questions and Answers
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| NASA/ESA Hubble |
Unblinding Results
Full Sky Search
6001 events are shown (887 events >100o zenith) from the 2005 dataset.
The likelihood ratio is evaluated on a 0.25ox0.25o grid ranging from -5o<δ<82.5o. At each point the significance is calculated, resulting in the following map of log10(p-value)
The maximum significance obtained is 3.58σ near 2.75h, +48o. Out of 100 sets of randomized data, 69 have a maximum significance equal to or greater than 3.58σ. The quantity γbest from the likelihood maximization is plotted for the skymap:
The fitted spectral index at the 3.58σ fluctuation near 2.75h, +48o is slightly greater than 3. Locations in white have a negative fluctuation in number of signal events, so spectral index information is meaningless.
Search Based on a List of Candidate Sources
The method is applied to the locations of sources in the IC-9 point source catalog and the limits (E2Φ < μ90*10-11 TeV cm-2s-1) and p-values (probability the result is due to background alone) are summarized in the table below. No excess near the Crab is observed in 2005| Object | RAo | Dec.o | P-value | μ90 |
| MGRO J2019+37 | 304.83 | 36.83 | 0.152 | 20.09 |
| Cyg OB2/TeV J2033+4130 | 308.29 | 41.32 | 0.387 | 12.38 |
| Mrk 421 | 166.11 | 38.21 | ~1 | 5.87 |
| Mrk 501 | 253.47 | 39.76 | 0.184 | 18.09 |
| 1ES 1959+650 | 300.00 | 65.15 | 0.071 | 32.14 |
| 1ES 2344+514 | 356.77 | 51.71 | 0.126 | 21.01 |
| H 1426+428 | 217.14 | 42.68 | 0.400 | 11.96 |
| BL Lac (QSO B2200+420) | 330.68 | 42.28 | 0.323 | 12.99 |
| 3C66A | 35.67 | 43.04 | 0.146 | 18.30 |
| 3C 454.3 | 343.49 | 16.15 | 0.398 | 12.64 |
| 4C 38.41 | 248.82 | 38.14 | ~1 | 8.57 |
| PKS 0528+134 | 82.74 | 13.53 | ~1 | 5.04 |
| 3C 273 | 187.28 | 2.05 | 0.406 | 12.73 |
| M87 | 187.71 | 12.39 | ~1 | 4.84 |
| NGC 1275 (Perseus A) | 49.95 | 41.51 | 0.064 | 22.43 |
| Cyg A | 299.87 | 40.73 | 0.078 | 22.11 |
| SS 433 | 287.96 | 4.98 | 0.102 | 19.99 |
| Cyg X-3 | 308.11 | 40.96 | 0.458 | 10.98 |
| Cyg X-1 | 299.59 | 35.20 | 0.414 | 12.88 |
| LS I +61 303 | 40.13 | 61.23 | ~1 | 3.81 |
| GRS 1915+105 | 288.80 | 10.95 | 0.581 | 8.28 |
| XTE J1118+480 | 169.55 | 48.04 | 0.113 | 20.54 |
| GRO J0422+32 | 65.43 | 32.91 | ~1 | 3.82 |
| Geminga | 98.48 | 17.77 | 0.649 | 7.58 |
| Crab Nebula | 83.63 | 22.01 | ~1 | 9.24 |
| Cas A | 350.85 | 58.82 | 0.341 | 15.24 |