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Caltech Authors (162.548 recursos)

Repository of works by Caltech published authors.

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  1. iPTF13beo: the double-peaked light curve of a Type Ibn supernova discovered shortly after explosion

    Gorbikov, Evgeny; Gal-Yam, Avishay; Ofek, Eran O.; Vreeswijk, Paul M.; Nugent, Peter E.; Chotard, Nicolas; Kulkarni, Shrinivas R.; Cao, Yi; De Cia, Annalisa; Yaron, Ofer; Tal, David; Arcavi, Iair; Kasliwal, Mansi M.; Cenko, S. Bradley; Sullivan, Mark; Chen, Juncheng
    We present optical photometric and spectroscopic observations of the Type Ibn (SN 2006jc-like) supernova (SN) iPTF13beo. Detected by the intermediate Palomar Transient Factory ∼3 h after the estimated first light, iPTF13beo is the youngest and the most distant (∼430 Mpc) Type Ibn event ever observed. The iPTF13beo light curve is consistent with light curves of other Type Ibn SNe and with light curves of fast Type Ic events, but with a slightly faster rise-time of two days. In addition, the iPTF13beo R-band light curve exhibits a double-peak structure separated by ∼9 d, not observed before in any Type Ibn SN....

  2. iPTF13beo: the double-peaked light curve of a Type Ibn supernova discovered shortly after explosion

    Gorbikov, Evgeny; Gal-Yam, Avishay; Ofek, Eran O.; Vreeswijk, Paul M.; Nugent, Peter E.; Chotard, Nicolas; Kulkarni, Shrinivas R.; Cao, Yi; De Cia, Annalisa; Yaron, Ofer; Tal, David; Arcavi, Iair; Kasliwal, Mansi M.; Cenko, S. Bradley; Sullivan, Mark; Chen, Juncheng
    We present optical photometric and spectroscopic observations of the Type Ibn (SN 2006jc-like) supernova (SN) iPTF13beo. Detected by the intermediate Palomar Transient Factory ∼3 h after the estimated first light, iPTF13beo is the youngest and the most distant (∼430 Mpc) Type Ibn event ever observed. The iPTF13beo light curve is consistent with light curves of other Type Ibn SNe and with light curves of fast Type Ic events, but with a slightly faster rise-time of two days. In addition, the iPTF13beo R-band light curve exhibits a double-peak structure separated by ∼9 d, not observed before in any Type Ibn SN....

  3. Optical follow-up observations of PTF10qts, a luminous broad-lined Type Ic supernova found by the Palomar Transient Factory

    Walker, E. S.; Mazzali, P. A.; Pian, E.; Hurley, K.; Arcavi, I.; Cenko, S. B.; Gal-Yam, A.; Horesh, A.; Kasliwal, M.; Poznanski, D.; Silverman, J. M.; Sullivan, M.; Bloom, J. S.; Filippenko, A. V.; Kulkarni, S. R.; Nugent, P. E.; Ofek, E.; Barthelmy, S.; Boynton, W.; Goldsten, J.; Golenetskii, S.; Ohno, M.; Tashiro, M. S.; Yamaoka, K.; Zhang, X. L.
    We present optical photometry and spectroscopy of the broad-lined Type Ic supernova (SN Ic-BL) PTF10qts, which was discovered as part of the Palomar Transient Factory. The SN was located in a dwarf galaxy of magnitude r = 21.1 at a redshift z = 0.0907. We find that the R-band light curve is a poor proxy for bolometric data and use photometric and spectroscopic data to construct and constrain the bolometric light curve. The derived bolometric magnitude at maximum light is M_bol = −18.51 ± 0.2 mag, comparable to that of SN 1998bw (M_bol = −18.7 mag) which was associated with...

  4. Optical follow-up observations of PTF10qts, a luminous broad-lined Type Ic supernova found by the Palomar Transient Factory

    Walker, E. S.; Mazzali, P. A.; Pian, E.; Hurley, K.; Arcavi, I.; Cenko, S. B.; Gal-Yam, A.; Horesh, A.; Kasliwal, M.; Poznanski, D.; Silverman, J. M.; Sullivan, M.; Bloom, J. S.; Filippenko, A. V.; Kulkarni, S. R.; Nugent, P. E.; Ofek, E.; Barthelmy, S.; Boynton, W.; Goldsten, J.; Golenetskii, S.; Ohno, M.; Tashiro, M. S.; Yamaoka, K.; Zhang, X. L.
    We present optical photometry and spectroscopy of the broad-lined Type Ic supernova (SN Ic-BL) PTF10qts, which was discovered as part of the Palomar Transient Factory. The SN was located in a dwarf galaxy of magnitude r = 21.1 at a redshift z = 0.0907. We find that the R-band light curve is a poor proxy for bolometric data and use photometric and spectroscopic data to construct and constrain the bolometric light curve. The derived bolometric magnitude at maximum light is M_bol = −18.51 ± 0.2 mag, comparable to that of SN 1998bw (M_bol = −18.7 mag) which was associated with...

  5. Optical follow-up observations of PTF10qts, a luminous broad-lined Type Ic supernova found by the Palomar Transient Factory

    Walker, E. S.; Mazzali, P. A.; Pian, E.; Hurley, K.; Arcavi, I.; Cenko, S. B.; Gal-Yam, A.; Horesh, A.; Kasliwal, M.; Poznanski, D.; Silverman, J. M.; Sullivan, M.; Bloom, J. S.; Filippenko, A. V.; Kulkarni, S. R.; Nugent, P. E.; Ofek, E.; Barthelmy, S.; Boynton, W.; Goldsten, J.; Golenetskii, S.; Ohno, M.; Tashiro, M. S.; Yamaoka, K.; Zhang, X. L.
    We present optical photometry and spectroscopy of the broad-lined Type Ic supernova (SN Ic-BL) PTF10qts, which was discovered as part of the Palomar Transient Factory. The SN was located in a dwarf galaxy of magnitude r = 21.1 at a redshift z = 0.0907. We find that the R-band light curve is a poor proxy for bolometric data and use photometric and spectroscopic data to construct and constrain the bolometric light curve. The derived bolometric magnitude at maximum light is M_bol = −18.51 ± 0.2 mag, comparable to that of SN 1998bw (M_bol = −18.7 mag) which was associated with...

  6. IPAC Image Processing and Data Archiving for the Palomar Transient Factory

    Laher, Russ R.; Surace, Jason; Grillmair, Carl J.; Jackson, Ed; Desai, Vandana; Levitan, David; Sesar, Branimir; Quimby, Robert; Kasliwal, Mansi; Horesh, Assaf; Bellm, Eric; Barlow, Tom; Prince, Thomas A.; Kulkarni, Shrinivas R.; Helou, George; Hamam, Nouhad; Masci, Frank J.; Mi, Wei; Groom, Steve; Teplitz, Harry; Hale, David; Smith, Roger; Waszczak, Adam
    The Palomar Transient Factory (PTF) is a multiepochal robotic survey of the northern sky that acquires data for the scientific study of transient and variable astrophysical phenomena. The camera and telescope provide for wide-field imaging in optical bands. In the five years of operation since first light on 2008 December 13, images taken with Mould-R and SDSS-g′ camera filters have been routinely acquired on a nightly basis (weather permitting), and two different Hα filters were installed in 2011 May (656 and 663 nm). The PTF image-processing and data-archival program at the Infrared Processing and Analysis Center (IPAC) is tailored to...

  7. IPAC Image Processing and Data Archiving for the Palomar Transient Factory

    Laher, Russ R.; Surace, Jason; Grillmair, Carl J.; Jackson, Ed; Desai, Vandana; Levitan, David; Sesar, Branimir; Quimby, Robert; Kasliwal, Mansi; Horesh, Assaf; Bellm, Eric; Barlow, Tom; Prince, Thomas A.; Kulkarni, Shrinivas R.; Helou, George; Hamam, Nouhad; Masci, Frank J.; Mi, Wei; Groom, Steve; Teplitz, Harry; Hale, David; Smith, Roger; Waszczak, Adam
    The Palomar Transient Factory (PTF) is a multiepochal robotic survey of the northern sky that acquires data for the scientific study of transient and variable astrophysical phenomena. The camera and telescope provide for wide-field imaging in optical bands. In the five years of operation since first light on 2008 December 13, images taken with Mould-R and SDSS-g′ camera filters have been routinely acquired on a nightly basis (weather permitting), and two different Hα filters were installed in 2011 May (656 and 663 nm). The PTF image-processing and data-archival program at the Infrared Processing and Analysis Center (IPAC) is tailored to...

  8. IPAC Image Processing and Data Archiving for the Palomar Transient Factory

    Laher, Russ R.; Surace, Jason; Grillmair, Carl J.; Jackson, Ed; Desai, Vandana; Levitan, David; Sesar, Branimir; Quimby, Robert; Kasliwal, Mansi; Horesh, Assaf; Bellm, Eric; Barlow, Tom; Prince, Thomas A.; Kulkarni, Shrinivas R.; Helou, George; Hamam, Nouhad; Masci, Frank J.; Mi, Wei; Groom, Steve; Teplitz, Harry; Hale, David; Smith, Roger; Waszczak, Adam
    The Palomar Transient Factory (PTF) is a multiepochal robotic survey of the northern sky that acquires data for the scientific study of transient and variable astrophysical phenomena. The camera and telescope provide for wide-field imaging in optical bands. In the five years of operation since first light on 2008 December 13, images taken with Mould-R and SDSS-g′ camera filters have been routinely acquired on a nightly basis (weather permitting), and two different Hα filters were installed in 2011 May (656 and 663 nm). The PTF image-processing and data-archival program at the Infrared Processing and Analysis Center (IPAC) is tailored to...

  9. IPAC Image Processing and Data Archiving for the Palomar Transient Factory

    Laher, Russ R.; Surace, Jason; Grillmair, Carl J.; Jackson, Ed; Desai, Vandana; Levitan, David; Sesar, Branimir; Quimby, Robert; Kasliwal, Mansi; Horesh, Assaf; Bellm, Eric; Barlow, Tom; Prince, Thomas A.; Kulkarni, Shrinivas R.; Helou, George; Hamam, Nouhad; Masci, Frank J.; Mi, Wei; Groom, Steve; Teplitz, Harry; Hale, David; Smith, Roger; Waszczak, Adam
    The Palomar Transient Factory (PTF) is a multiepochal robotic survey of the northern sky that acquires data for the scientific study of transient and variable astrophysical phenomena. The camera and telescope provide for wide-field imaging in optical bands. In the five years of operation since first light on 2008 December 13, images taken with Mould-R and SDSS-g′ camera filters have been routinely acquired on a nightly basis (weather permitting), and two different Hα filters were installed in 2011 May (656 and 663 nm). The PTF image-processing and data-archival program at the Infrared Processing and Analysis Center (IPAC) is tailored to...

  10. Interaction-powered Supernovae: Rise-time versus Peak-luminosity Correlation and the Shock-breakout Velocity

    Ofek, Eran O.; Arcavi, Iair; Tal, David; Sullivan, Mark; Gal-Yam, Avishay; Kulkarni, Shrinivas R.; Nugent, Peter E.; Ben-Ami, Sagi; Bersier, David; Cao, Yi; Cenko, S. Bradley; De Cia, Annalisa; Filippenko, Alexei V.; Fransson, Claes; Kasliwal, Mansi M.; Laher, Russ R.; Surace, Jason; Quimby, Robert M.; Yaron, Ofer
    Interaction of supernova (SN) ejecta with the optically thick circumstellar medium (CSM) of a progenitor star can result in a bright, long-lived shock-breakout event. Candidates for such SNe include Type IIn and superluminous SNe. If some of these SNe are powered by interaction, then there should be a specific relation between their peak luminosity, bolometric light-curve rise time, and shock-breakout velocity. Given that the shock velocity during shock breakout is not measured, we expect a correlation, with a significant spread, between the rise time and the peak luminosity of these SNe. Here, we present a sample of 15 SNe IIn...

  11. Interaction-powered Supernovae: Rise-time versus Peak-luminosity Correlation and the Shock-breakout Velocity

    Ofek, Eran O.; Arcavi, Iair; Tal, David; Sullivan, Mark; Gal-Yam, Avishay; Kulkarni, Shrinivas R.; Nugent, Peter E.; Ben-Ami, Sagi; Bersier, David; Cao, Yi; Cenko, S. Bradley; De Cia, Annalisa; Filippenko, Alexei V.; Fransson, Claes; Kasliwal, Mansi M.; Laher, Russ R.; Surace, Jason; Quimby, Robert M.; Yaron, Ofer
    Interaction of supernova (SN) ejecta with the optically thick circumstellar medium (CSM) of a progenitor star can result in a bright, long-lived shock-breakout event. Candidates for such SNe include Type IIn and superluminous SNe. If some of these SNe are powered by interaction, then there should be a specific relation between their peak luminosity, bolometric light-curve rise time, and shock-breakout velocity. Given that the shock velocity during shock breakout is not measured, we expect a correlation, with a significant spread, between the rise time and the peak luminosity of these SNe. Here, we present a sample of 15 SNe IIn...

  12. Interaction-powered Supernovae: Rise-time versus Peak-luminosity Correlation and the Shock-breakout Velocity

    Ofek, Eran O.; Arcavi, Iair; Tal, David; Sullivan, Mark; Gal-Yam, Avishay; Kulkarni, Shrinivas R.; Nugent, Peter E.; Ben-Ami, Sagi; Bersier, David; Cao, Yi; Cenko, S. Bradley; De Cia, Annalisa; Filippenko, Alexei V.; Fransson, Claes; Kasliwal, Mansi M.; Laher, Russ R.; Surace, Jason; Quimby, Robert M.; Yaron, Ofer
    Interaction of supernova (SN) ejecta with the optically thick circumstellar medium (CSM) of a progenitor star can result in a bright, long-lived shock-breakout event. Candidates for such SNe include Type IIn and superluminous SNe. If some of these SNe are powered by interaction, then there should be a specific relation between their peak luminosity, bolometric light-curve rise time, and shock-breakout velocity. Given that the shock velocity during shock breakout is not measured, we expect a correlation, with a significant spread, between the rise time and the peak luminosity of these SNe. Here, we present a sample of 15 SNe IIn...

  13. 313 New Asteroid Rotation Periods from Palomar Transient Factory Observations

    Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; Waszczak, Adam; Kulkarni, Shrinivas R.; Levitan, David; Sesar, Branimir; Laher, Russ; Surace, Jason; Prince, Thomas A.
    A new asteroid rotation period survey has been carried out by using the Palomar Transient Factory (PTF). Twelve consecutive PTF fields, which covered an area of 87 deg^2 in the ecliptic plane, were observed in the R band with a cadence of ~20 minutes during 2013 February 15-18. We detected 2500 known asteroids with a diameter range of 0.5 km ≤ D ≤ 200 km. Of these, 313 objects had highly reliable rotation periods and exhibited the "spin barrier" at ~2 hr. In contrast to the flat spin-rate distribution of the asteroids with 3 km ≤ D ≤ 15 km...

  14. 313 New Asteroid Rotation Periods from Palomar Transient Factory Observations

    Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; Waszczak, Adam; Kulkarni, Shrinivas R.; Levitan, David; Sesar, Branimir; Laher, Russ; Surace, Jason; Prince, Thomas A.
    A new asteroid rotation period survey has been carried out by using the Palomar Transient Factory (PTF). Twelve consecutive PTF fields, which covered an area of 87 deg^2 in the ecliptic plane, were observed in the R band with a cadence of ~20 minutes during 2013 February 15-18. We detected 2500 known asteroids with a diameter range of 0.5 km ≤ D ≤ 200 km. Of these, 313 objects had highly reliable rotation periods and exhibited the "spin barrier" at ~2 hr. In contrast to the flat spin-rate distribution of the asteroids with 3 km ≤ D ≤ 15 km...

  15. The rise and fall of the Type Ib supernova iPTF13bvn - Not a massive Wolf-Rayet star

    Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Valenti, S.; Arcavi, I.; Ben-Ami, S.; Cao, Y.; Cenko, S. B.; Filippenko, A. V.; Gal-Yam, A.; Howell, D. A.
    Context. We investigate iPTF13bvn, a core-collapse (CC) supernova (SN) in the nearby spiral galaxy NGC 5806. This object was discovered by the intermediate Palomar Transient Factory (iPTF) very close to the estimated explosion date and was classified as a stripped-envelope CC SN, likely of Type Ib. Furthermore, a possible progenitor detection in pre-explosion Hubble Space Telescope (HST) images was reported, making this the only SN Ib with such an identification. Based on the luminosity and color of the progenitor candidate, as well as on early-time spectra and photometry of the SN, it was argued that the progenitor candidate is consistent...

  16. The rise and fall of the Type Ib supernova iPTF13bvn - Not a massive Wolf-Rayet star

    Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Valenti, S.; Arcavi, I.; Ben-Ami, S.; Cao, Y.; Cenko, S. B.; Filippenko, A. V.; Gal-Yam, A.; Howell, D. A.
    Context. We investigate iPTF13bvn, a core-collapse (CC) supernova (SN) in the nearby spiral galaxy NGC 5806. This object was discovered by the intermediate Palomar Transient Factory (iPTF) very close to the estimated explosion date and was classified as a stripped-envelope CC SN, likely of Type Ib. Furthermore, a possible progenitor detection in pre-explosion Hubble Space Telescope (HST) images was reported, making this the only SN Ib with such an identification. Based on the luminosity and color of the progenitor candidate, as well as on early-time spectra and photometry of the SN, it was argued that the progenitor candidate is consistent...

  17. The rise and fall of the Type Ib supernova iPTF13bvn - Not a massive Wolf-Rayet star

    Fremling, C.; Sollerman, J.; Taddia, F.; Ergon, M.; Valenti, S.; Arcavi, I.; Ben-Ami, S.; Cao, Y.; Cenko, S. B.; Filippenko, A. V.; Gal-Yam, A.; Howell, D. A.
    Context. We investigate iPTF13bvn, a core-collapse (CC) supernova (SN) in the nearby spiral galaxy NGC 5806. This object was discovered by the intermediate Palomar Transient Factory (iPTF) very close to the estimated explosion date and was classified as a stripped-envelope CC SN, likely of Type Ib. Furthermore, a possible progenitor detection in pre-explosion Hubble Space Telescope (HST) images was reported, making this the only SN Ib with such an identification. Based on the luminosity and color of the progenitor candidate, as well as on early-time spectra and photometry of the SN, it was argued that the progenitor candidate is consistent...

  18. PTF1 J191905.19+481506.2--A Partially Eclipsing AM CVn System Discovered in the Palomar Transient Factory

    Levitan, David; Kupfer, Thomas; Groot, Paul J.; Margon, Bruce; Prince, Thomas A.; Kulkarni, Shrinivas R.; Hallinan, Gregg; Harding, Leon K.; Kyne, Gillian; Laher, Russ; Ofek, Eran O.; Rutten, René G. M.; Sesar, Branimir; Surace, Jason
    We report on PTF1 J191905.19+481506.2, a newly discovered, partially eclipsing, outbursting AM CVn system found in the Palomar Transient Factory synoptic survey. This is only the second known eclipsing AM CVn system. We use high-speed photometric observations and phase-resolved spectroscopy to establish an orbital period of 22.4559(3) minutes. We also present a long-term light curve and report on the normal and super-outbursts regularly seen in this system, including a super-outburst recurrence time of 36.8(4) days. We use the presence of the eclipse to place upper and lower limits on the inclination of the system and discuss the number of known...

  19. PTF1 J191905.19+481506.2--A Partially Eclipsing AM CVn System Discovered in the Palomar Transient Factory

    Levitan, David; Kupfer, Thomas; Groot, Paul J.; Margon, Bruce; Prince, Thomas A.; Kulkarni, Shrinivas R.; Hallinan, Gregg; Harding, Leon K.; Kyne, Gillian; Laher, Russ; Ofek, Eran O.; Rutten, René G. M.; Sesar, Branimir; Surace, Jason
    We report on PTF1 J191905.19+481506.2, a newly discovered, partially eclipsing, outbursting AM CVn system found in the Palomar Transient Factory synoptic survey. This is only the second known eclipsing AM CVn system. We use high-speed photometric observations and phase-resolved spectroscopy to establish an orbital period of 22.4559(3) minutes. We also present a long-term light curve and report on the normal and super-outbursts regularly seen in this system, including a super-outburst recurrence time of 36.8(4) days. We use the presence of the eclipse to place upper and lower limits on the inclination of the system and discuss the number of known...

  20. A Wolf–Rayet-like progenitor of SN 2013cu from spectral observations of a stellar wind

    Gal-Yam, Avishay; Arcavi, I.; Ofek, E. O.; Ben-Ami, S.; Cenko, S. B.; Kasliwal, M. M.; Cao, Y.; Yaron, O.; Tal, D.; Silverman, J. M.; Horesh, A.; De Cia, A.; Taddia, F.; Sollerman, J.; Perley, D.; Vreeswijk, P. M.; Kulkarni, S. R.; Nugent, P. E.; Filippenko, A. V.; Wheeler, J. C.
    The explosive fate of massive Wolf–Rayet stars^1 (WRSs) is a key open question in stellar physics. An appealing option is that hydrogen-deficient WRSs are the progenitors of some hydrogen-poor supernova explosions of types IIb, Ib and Ic (ref. 2). A blue object, having luminosity and colours consistent with those of some WRSs, has recently been identified in pre-explosion images at the location of a supernova of type Ib (ref. 3), but has not yet been conclusively determined to have been the progenitor. Similar work has so far only resulted in non-detections^4. Comparison of early photometric observations of type Ic supernovae with theoretical models...

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