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首页> 外文期刊>The Astrophysical journal >THE J-BAND LIGHT CURVE OF SN 2003 lw, ASSOCIATED WITH GRB 031203
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THE J-BAND LIGHT CURVE OF SN 2003 lw, ASSOCIATED WITH GRB 031203

机译：SN 2003 lw的J波段光曲线，与GRB 031203相关

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摘要

At z = 0.1055, the gamma-ray burst GRB 031203 is the second nearest GRB known. Using observations from the Very Large Array and the Chandra X-Ray Observatory, we derive subarcsecond localizations of the radio and X-ray afterglow of this GRB. We present near-infrared observations of the supernova SN 2003 lw, which exploded in the host galaxy of GRB 031203. Our deep high-resolution Magellan data establish that this SN is spatially coincident with the radio and X-ray localizations of the afterglow of GRB 031203 to subarcsecond precision and is thus firmly associated with the GRB. We use image differencing to subtract the bright emission from the host galaxy and measure the SN flux at ～5, ～7, and ～50 days after the GRB. Our J-band measurements are inconsistent with predictions derived by placing SN 1998bw (associated with GRB 980425) at z = 0.1055. In particular, our early data points show that before peak, SN 20031w was significantly fainter in rest frame ～1.13 μm (observed J band) than SN 1998bw. We measure similar fluxes at ～7 and ～50 days after the GRB, suggesting that SN 20031w had a light-curve shape that is quite different from that of SN 1998bw, the best-studied GRB-associated SN so far.
机译：在z = 0.1055时，伽马射线暴GRB 031203是已知的第二近GRB。利用甚大阵列和钱德拉X射线天文台的观测，我们得出了该GRB的射电和X射线余辉的亚秒级定位。我们介绍了超新星SN 2003 lw的近红外观测结果，它在GRB 031203的宿主星系中爆炸。我们的高分辨率麦哲伦数据证实，该SN与GRB余辉的无线电和X射线定位在空间上重合031203达到亚秒级精度，因此与GRB紧密相关。我们使用图像差分法从宿主星系中减去明亮的发射，并在GRB之后的〜5，〜7和〜50天测量SN的通量。我们的J波段测量结果与将SN 1998bw（与GRB 980425相关）放置在z = 0.1055时得出的预测不一致。特别是，我们的早期数据点表明，在达到峰值之前，SN 20031w在静止帧〜1.13μm（观察到的J波段）中比SN 1998bw显着减弱。我们在GRB之后的大约7和〜50天测量了相似的通量，这表明SN 20031w的光曲线形状与SN 1998bw（迄今为止研究最广的GRB相关SN）有很大不同。

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