J/AJ/147/99 Spectroscopy of 73 stripped core-collapse supernovae (Modjaz+, 2014)
Optical spectra of 73 stripped-envelope core-collapse supernovae.
Modjaz M., Blondin S., Kirshner R.P., Matheson T., Berlind P., Bianco F.B.,
Calkins M.L., Challis P., Garnavich P., Hicken M., Jha S., Liu Y.Q.,
Marion G.H.
<Astron. J., 147, 99 (2014)>
=2014AJ....147...99M 2014AJ....147...99M
ADC_Keywords: Supernovae ; Surveys ; Spectroscopy ; Redshifts
Keywords: supernovae: general - surveys
Abstract:
We present 645 optical spectra of 73 supernovae (SNe) of Types IIb,
Ib, Ic, and broad-lined Ic. All of these types are attributed to the
core collapse of massive stars, with varying degrees of intact H and
He envelopes before explosion. The SNe in our sample have a mean
redshift $ = 4200 km/s. Most of these spectra were gathered
at the Harvard-Smithsonian Center for Astrophysics (CfA) between 2004
and 2009. For 53 SNe, these are the first published spectra. The data
coverage ranges from mere identification (1-3 spectra) for a few SNe
to extensive series of observations (10-30 spectra) that trace the
spectral evolution for others, with an average of 9 spectra per SN.
For 44 SNe of the 73 SNe presented here, we have well-determined dates
of maximum light to determine the phase of each spectrum. Our sample
constitutes the most extensive spectral library of stripped-envelope
SNe to date. We provide very early coverage (as early as 30 days
before V-band max) for photospheric spectra, as well as late-time
nebular coverage when the innermost regions of the SN are visible (as
late as 2 yr after explosion, while for SN 1993J, we have data as late
as 11.6 yr). This data set has homogeneous observations and reductions
that allow us to study the spectroscopic diversity of these classes of
stripped SNe and to compare these to SNe-gamma-ray bursts. We
undertake these matters in follow-up papers.
Description:
Most of the early-time spectroscopic supernova monitoring was
performed via queue observers at the 1.5m Tillinghast telescope at the
Fred Lawrence Whipple Observatory (FLWO) that produced the vast
majority (615 of 645 spectra) of the low-resolution spectra presented
here. In addition, we observed SNe for late-time studies (≳3-6
months) with the 6.5m Clay Telescope of the Magellan Observatory
located at Las Campanas Observatory (LCO), the 6.5m MMT at FLWO, and
the 8.1m Gemini-North Telescope in Hawaii via queue observations
(Program IDs GN-2005B-Q-11 & GN-2006B-Q-16, GN-2007A-DD-4,
GN-2008A-Q-17, PI: M. Modjaz). The spectrographs utilized were the
FAST at the FLWO 1.5m telescope, the LDSS-3 at LCO, the Blue Channel
at the MMT, and GMOS-North at Gemini-North.
The FAST spectra were obtained with an observed wavelength range of
3500-7400Å. The wavelength resolution was ∼7Å, in other words,
R=λ/Δλ∼800 at the central wavelength of 5600Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 156 671 Journal of observations
table2.dat 102 73 Stripped supernova sample: supernova and host
galaxy information
observer.dat 22 93 Observers
standard.dat 20 31 Standard stars sued
notes.dat 917 31 Notes
refs.dat 376 25 References
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/ApJ/759/107 : Core-collapse SNe and host galaxies (Kelly+, 2012)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia supernovae (Blondin+, 2012)
J/A+A/526/A28 : SDSS-II supernovae NTT and NOT spectroscopy (Oestman+, 2011)
J/ApJ/741/97 : Light curves of Ibc supernovae (Drout+, 2011)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)
J/ApJ/687/1201 : SN and LGRB locations in their host galaxies (Kelly+, 2008)
J/ApJ/673/999 : Supernova and host galaxies metallicities (Prieto+, 2008)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/PASP/111/438 : Updated Zwicky catalog (UZC) (Falco+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova identifier (YYYYaa)
11- 23 A13 "Y:M:D" Date UT date at midpoint of observation
25- 34 F10.2 d HJD Heliocentric Julian Date at midpoint of
observation
36 A1 --- f_Phase [@] No reliable estimate for the time of
maximum. Phase given is relative to the first
spectrum
37- 44 F8.2 d Phase Rest-frame age of spectrum relative to V-band
maximum
46- 52 A7 --- Inst Telescope and instrument used (1)
54- 58 I5 0.1nm lam.0 Lower wavelength range λ0; in Å
60- 64 I5 0.1nm lam.1 Upper wavelength range λ1; in Å
66- 69 F4.2 0.1nm/pix Disp ? Spectral dispersion; in Å/pixel
71- 75 A5 0.1nm Res Approximate FWHM spectral resolution; in Å
77- 82 F6.1 deg PA [-177/170]? Observed position angle during
observation
84- 87 F4.1 deg dPhi Absolute difference |ΔΦ| (2)
89- 92 F4.2 --- AirM Airmass
94-107 A14 arcsec FStd Flux standard star; in standard.dat file
109-113 A5 --- f_FStd Flag on FStd (+s37, 0.75", long, red, spec6)
115-120 A6 arcsec See Observer seeing estimate
122-124 F3.1 arcsec Slit ? Spectroscopic slit width
126-141 A16 s Exp Exposure time; separate exposures indicated
143-156 A14 --- Obs Observer code; in observer.dat file
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Note (1): Telescope and instrument codes are defined as follows:
FAST = Fred Lawrence Whipple Observatory (FLWO) 1.5m Tillinghast telescope
+ FAst Spectrograph for the Tillinghast Telescope (FAST);
LDSS2 = The 6.5m Clay Telescope of the Magellan Observatory located at Las
Campanas Observatory (LCO) + LDSS2 spectrograph;
LDSS3 = Magellan Clay + LDSS3;
MMTblue = The 6.5m MMT at FLWO + Blue Channel spectrograph.
Note (2): Between observed position angle and the average parallactic angle
over the course of the observation.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova identifier (YYYYaa)
8- 17 A10 --- Type Supernova type (1)
19 A1 --- f_Type [f] Possibility of the emergence of HeI lines (2)
21- 29 A9 --- Ref Discovery reference (IAUC or CBET number) (3)
31- 35 A5 --- n_Galaxy Discovery mode of the host galaxy (Targeted or
Non-Targeted)
37- 55 A19 --- Galaxy Host galaxy
57 A1 --- l_Off1 [<] Upper limit flag on Off1
58- 62 F5.1 arcsec Off1 Supernova offset (4)
63 A1 --- f_Off1 Flag on Off1
65 A1 --- l_Off2 [<] Upper limit flag on Off2
66- 70 F5.1 arcsec Off2 Supernova offset (4)
71 A1 --- f_Off2 Flag on Off2
73- 77 I5 km/s cz [-140/13890] Heliocentric galaxy redshift
79 A1 --- l_JD [<] Upper limit flag on date of maximum (5)
80- 89 F10.2 d JD ? Supernova Julian date of maximum light in the
V band
90 A1 --- f_JD Flag on date of maximum (6)
92-102 A11 --- r_JD Reference on JD; in refs.dat file
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Note (1): The supernova types were re-determined by us via running the Supernova
Identification (SNID) code on all our supernova spectra and are sometimes
different from those listed in the IAU list of supernovae (see Table3 in
the paper). The supernova type "Ic-bl" stands for broad-lined SNe Ic.
SN 2006jc is an SN Ib-n ("n" for narrow) that showed narrow He lines in
emission. See the text for details.
Note (2): We cannot exclude the potential possibility of the emergence of HeI
lines in these SNe Ic, since our spectra were taken either before or well
after maximum light.
Note (3): IAUC=International Astronomical Union Circulars; CBET=Central Bureau
Electronic Telegrams (http://cfa-www.harvard.edu/iau/cbat.html).
Note (4): Offsets from the center of host galaxy as listed in discovery IAUCs or
as derived by comparing supernova and host-galaxy coordinates.
Note (5): Based on the Harvard-Smithsonian Center for Astrophysics (CfA) data.
Note (6): Flag as follows:
e = Supernovae with measured and listed maximum only in R band;
g = SN 2005bf showed a pronounced double-peak light curve-here we are using the
main, second, maximum.
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Byte-by-byte Description of file: observer.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Code Observer code
6- 22 A17 --- Name Observer name
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Byte-by-byte Description of file: standard.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ID Standard star code
9- 20 A12 --- Name Standard star name
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova identifier (YYYYaa)
11-917 A907 --- Text Text of the note
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference identifier
6- 24 A19 --- BibCode Bibliographic code
26- 49 A24 --- Aut Author's name
51-376 A326 --- Com Comments
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 12-Sep-2014