SUMMARY OF PROPOSAL 62137
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DEEP SEARCH FOR AN ENIGMATIC EGRET SOURCE
ABSTRACTThe brightest EGRET source at high Galactic latitude that remains unidentified is 2EG J1835+5919. Its uncertainty in position is only 9 arc minutes, yet there are no blazar or pulsar candidates in its error circle, and no X-ray source was detected in a ROSAT HRI observation. The absence of any plausible counterpart already makes it likely that 2EG J1835+5919 is the prototype of a new class of variable high-energy gamma-ray source, possibly the long-sought radio quiet or "proton blazar". One reason that ROSAT may have failed to detect an X-ray counterpart is if the source is highly absorbed. Another is if its X-rays are intrinsically hard or variable. A deep ASCA pointing may identify such a source, and reveal the nature of a new class of gamma-ray emitters.
|CO-I NAME ||INSTITUTE ||COUNTRY |
| BRENDA DINGUS||U. UTAH||USA|
| MATTHEW MALKAN||UCLA||USA|
| MICHAEL ERACLEOUS||UC BERKELEY||USA|
|TARGET NAME||PRI||RA||DEC||TIME||TC||OFF||GIS||SIS CNT||OBS|
|1)2EG J1835+5919|| 2||278.7879|| 59.3222|| 80 ks||N||N||P||0.01000||1|
TARGET 1SET LOWER-LEVEL DISCRIMINATOR IN 4-CCD MODE TO WHATEVER LEVEL IS NECESSARY TO AVOID TELEMETRY SATURATION.