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Follow Up and Archive of SN2014J

SN2014J in M82 (ATel#5786, UCL press release) represents a unique opportunity for following up a nearby type Ia supernova. ING provides a public archive of observations obtained by ING astronomers and volunteering visiting astronomers. Please contact local coordinator Javier Méndez (jmaing.iac.es) for more information.

Publications

Data obtained

Data are now public and can be retrieved from the ING Archive.

Instructions for observers

Both visiting and ING astronomers are invited to obtain data whenever possible. These are some useful instructions and priorities:

Basic information

Object: PSN J09554214+6940260
Positon: 09:55:42.121 +69:40:25.88
Position angle of galactic plane ~245°
Distance: 3.5 Mpc
Distance modulus: -27.72
Redshift ~0.000677
R(V)<2 (ATel #5830)
E(B-V)~0.8 (ATel, #5816)
Peak brightness: 31 January 2014
Magnitude variation (B,V):
0.12 mag/day before 15 Feb
0.017 mag/day after 15 Feb

Finding charts: FC1 | FC2 (2014 Jan 22, iTelescope.NET).

More information:
Wikipedia
CBAT Transient Object Followup Reports
The Astronomer's Telegram
IAU CBET

Optimum visibility:

Imaging

Reference information:

Multiband type Ia light curves, extracted from Burns et al., 2011, AJ, 141, 19. On the left SN2006et and on the right 2007af. To convert the shown magnitudes on the plots to the ones expected for SN2014J do the following:

m(2014J)=m(2006et)-6.96
m(2014J)=m(2007af)-4.18

For example, from the plot mV(2006et)=~22.4 at ~10 days before maximum. Subtracting the summed factor, observed mV(2006et)=~16.6, and so mV(2014J)=~9.6.

mV=11.82+(0.017mag/day)xΔd, Δd=number of days from 15 February.

UBVRIZJHK photometry. Short exposures, avoid saturation of supernova. Take biases and flats. Photometric standard no required.

Spectroscopy

Reference information:

Type-Ia SN2012fr spectral evolution, extracted from Childress et al., 2013, ApJ, 770, 29.
Type-Ia SN2009nr spectral evolution, and comparison with similar SNe, extracted from Khan et a., 2011, ApJ, 726, 106.

High resolution

Preferred setup: Centred on Na I D (5890Å) and additionally on Ca H and K (3950Å). Calibrations: spectrophotometric standard, arcs, lamp flats.

Medium resolution

Preferred setup: Cenwaves ~4500Å and 5900Å. Calibrations: spectrophotometric standard, arcs, lamp flats.

Low resolution

3500Å - 9000Å. If ACAM, no calibrations required, else spectrophotometric standard, arcs, lamp flats.

Data upload

Please make the data available as soon as possible. Copy the data across logged on the linux ING network (on PCs WHTDRPC1 or INTDRPC1, for instance):

mkdir /obsdata/outgoing/SN_M82/<telescope>/<night>

and copy the data. For instance:

mkdir /obsdata/outgoing/SN_M82/INT/20140122
cp /obsdata/inta/20140122/r103922[2-5]* /obsdata/outgoing/SN_M82/INT/20140122

Make sure that the observing log for the night shows the name of the observers who collected the SN data.



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Last modified: 28 May 2018
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