Four epochs of VLBA/HSA observations of SN 2001 em

F. K. Schinzel; G. B. Taylor; C. J. Stockdale; J. Granot; E. Ramirez-Ruiz

doi:10.1063/1.2943520

Four epochs of VLBA/HSA observations of SN 2001 em

F. K. Schinzel, G. B. Taylor, C. J. Stockdale, J. Granot, E. Ramirez-Ruiz

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

SN 2001 em is a peculiar supernova (SN) which has been reclassified from Type Ib/c to IIn. We deduced the limits for its proper motion as well as the expansion velocity by analysing four epochs of VLBI observations. Our 2σ upper limit of its proper motion is (23,000±30,000)kms^-1 and for the expansion velocity is 9000kms^-1 with 95% confidence. Thus we confirm the analysis of Bietenholz & Bartel that this was not a jet-driven gamma ray burst event. The supernova is unresolved 6 years after the explosion. We find no evidence for the existence of a jet. These values suggest interaction of the SN ejecta with a dense circumstellar medium. VLA observations of the flux density over 4 years of observations show a power law decay.

Original language	English
Title of host publication	Gamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference
Pages	509-512
Number of pages	4
DOIs	https://doi.org/10.1063/1.2943520
State	Published - 2008
Externally published	Yes
Event	Santa Fe Conference on Gamma-Ray Bursts 2007, GRB 2007 - Santa Fe, NM, United States Duration: 5 Nov 2007 → 9 Nov 2007

Publication series

Name	AIP Conference Proceedings
Volume	1000
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	Santa Fe Conference on Gamma-Ray Bursts 2007, GRB 2007
Country/Territory	United States
City	Santa Fe, NM
Period	5/11/07 → 9/11/07

Keywords

VLBA-HSA-VLA
core collapse-type Iln-sn2001em-techniques
image processing-VLBI-instruments
supernova

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10.1063/1.2943520

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title = "Four epochs of VLBA/HSA observations of SN 2001 em",

abstract = "SN 2001 em is a peculiar supernova (SN) which has been reclassified from Type Ib/c to IIn. We deduced the limits for its proper motion as well as the expansion velocity by analysing four epochs of VLBI observations. Our 2σ upper limit of its proper motion is (23,000±30,000)kms-1 and for the expansion velocity is 9000kms-1 with 95% confidence. Thus we confirm the analysis of Bietenholz & Bartel that this was not a jet-driven gamma ray burst event. The supernova is unresolved 6 years after the explosion. We find no evidence for the existence of a jet. These values suggest interaction of the SN ejecta with a dense circumstellar medium. VLA observations of the flux density over 4 years of observations show a power law decay.",

keywords = "VLBA-HSA-VLA, core collapse-type Iln-sn2001em-techniques, image processing-VLBI-instruments, supernova",

author = "Schinzel, {F. K.} and Taylor, {G. B.} and Stockdale, {C. J.} and J. Granot and E. Ramirez-Ruiz",

year = "2008",

doi = "10.1063/1.2943520",

language = "אנגלית",

isbn = "9780735405332",

series = "AIP Conference Proceedings",

pages = "509--512",

booktitle = "Gamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference",

}

Schinzel, FK, Taylor, GB, Stockdale, CJ, Granot, J & Ramirez-Ruiz, E 2008, Four epochs of VLBA/HSA observations of SN 2001 em. in Gamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference. AIP Conference Proceedings, vol. 1000, pp. 509-512, Santa Fe Conference on Gamma-Ray Bursts 2007, GRB 2007, Santa Fe, NM, United States, 5/11/07. https://doi.org/10.1063/1.2943520

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T1 - Four epochs of VLBA/HSA observations of SN 2001 em

AU - Schinzel, F. K.

AU - Taylor, G. B.

AU - Stockdale, C. J.

AU - Granot, J.

AU - Ramirez-Ruiz, E.

PY - 2008

Y1 - 2008

N2 - SN 2001 em is a peculiar supernova (SN) which has been reclassified from Type Ib/c to IIn. We deduced the limits for its proper motion as well as the expansion velocity by analysing four epochs of VLBI observations. Our 2σ upper limit of its proper motion is (23,000±30,000)kms-1 and for the expansion velocity is 9000kms-1 with 95% confidence. Thus we confirm the analysis of Bietenholz & Bartel that this was not a jet-driven gamma ray burst event. The supernova is unresolved 6 years after the explosion. We find no evidence for the existence of a jet. These values suggest interaction of the SN ejecta with a dense circumstellar medium. VLA observations of the flux density over 4 years of observations show a power law decay.

AB - SN 2001 em is a peculiar supernova (SN) which has been reclassified from Type Ib/c to IIn. We deduced the limits for its proper motion as well as the expansion velocity by analysing four epochs of VLBI observations. Our 2σ upper limit of its proper motion is (23,000±30,000)kms-1 and for the expansion velocity is 9000kms-1 with 95% confidence. Thus we confirm the analysis of Bietenholz & Bartel that this was not a jet-driven gamma ray burst event. The supernova is unresolved 6 years after the explosion. We find no evidence for the existence of a jet. These values suggest interaction of the SN ejecta with a dense circumstellar medium. VLA observations of the flux density over 4 years of observations show a power law decay.

KW - VLBA-HSA-VLA

KW - core collapse-type Iln-sn2001em-techniques

KW - image processing-VLBI-instruments

KW - supernova

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BT - Gamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference

T2 - Santa Fe Conference on Gamma-Ray Bursts 2007, GRB 2007

Y2 - 5 November 2007 through 9 November 2007

ER -

Four epochs of VLBA/HSA observations of SN 2001 em

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