DDT Highlight: SN 2014J Imaging and Spectroscopy with FORCAST, FLITECAM, and HIPO

SOFIA near-IR image of Supernova 2014J

Two images of the central portions of galaxy M82 that include the position of Supernova 2014J (north is at the top, east is to the left in these images). (left) Near-infrared image from the 2-Micron All-Sky Survey (2MASS), before the supernova explosion. (right) Image of M82 including the supernova at near-infrared wavelengths J, H, and K (1.2, 1.65, and 2.2 microns), made Feb. 20 by the FLITECAM instrument on SOFIA.

NASA/SOFIA/FLITECAM team/S. Shenoy
SN 2014J Spectrum

FLITECAM observed the H + K-band spectrum on Feb. 19, 2014 and Feb. 27, 2014 with strong emission features at 1.55-1.65 μm and 1.77 μm. The detail of the geometry of the 1.77 μm emission peak has enabled it to be identified as permitted lines of Co ΙΙ rather than a blend of Fe group lines and Co ΙΙ as previously believed. The strongest emission lines of Co ΙΙ and [Co ΙΙΙ] are presented in the bottom of each plot, and triangles indicate the locations of lines predicted to be strong in the model for comparison. 

Favorable atmospheric transmission achievable in the stratosphere onboard SOFIA has enabled FLITECAM spectra to be the only data collected on SN 2014J that spans the entire feature profile. 

Vacca, W. D. et al., 2015, ApJ, 804, 66.
Programs for Observations of SN 2014J
PID Instrument Config. Time Observation Dates Range
02_0100 FLITECAM Spectroscopy - J, H, K-bands 2 hrs Feb 17-28
75_0001 FLITECAM Spectroscopy - LM+B, LM+C 4 hrs Feb 17-28
75_0002 FORCAST Imaging - 7.7, 8.6, 11.1, 19.7, 37.1 µm 1.5 hrs Mar 19-28; Apr 30-May 8h
75_0003 FORCAST Spectroscopy - G063, G111 4 hrs Mar 19-28; Apr 30-May 8

Observations of SN 2014J were obtained using FLITECAM on flights 146, 147, 148 and 149 and using FORCAST on flight 154. They were obtained as part of the following programs -

02_0100, PI: P. Garnavich, FLITECAM grism spectroscopy.
75_0001, PI: R. Hamilton, FLITECAM grism spectroscopy.
75_0002, PI: R. Gehrz, FLITECAM and FORCAST imaging.
75_0003, PI: W. Vacca, FORCAST grism spectroscopy.

The data obtained as part of these programs have no proprietary period, and available to the public upon ingestion into the archive.

No Program ID ; PI: J. Spyromilio (ESO)
DDT proposal to observe Supernova 2014J (J09554214+6940260) in M82 with SOFIA

Program ID: 02_0100 ; P. Garnavich (University of Notre Dame)
Mind the Gap: Filling in the Holes in IR Spectra of Type Ia Supernovae

The data from this program were obtained as part of the Cycle 2 time allocation.

The data files in the archive at this time include raw science instrument frames listed as LEVEL_0 or LEVEL_1 (for this release the two may be considered identical) for all the FLITECAM and FORCAST data obtained on SN 2014J. The artefact-corrrected images are archived as LEVEL_2 data, and the final results after calibration appear as LEVEL_3 data. 

Note also that HIPO data were obtained along with the FLITECAM data, since both instruments were observing simultaneously. Because HIPO is a Special Purpose Principal Investigator Instrument, calibrated data are not available on the SOFIA archive, but the Level 1 data may be obtained via the search page by querying on "HIPO" under the Instrument Name pull-down menu.

Download the Data

  • Visit the SOFIA Data Archive at IPAC 
  • Under "Spatial Constraints", select "All-Sky" 
  • Under “Proposal Constraints”, enter the into PlanID field (see below for details)
  • Under “Data Product Constraints”, ensure that all desired levels are checked
  • Select Search
  • Use the menu bars to view and download the data for specific instruments.

Use the following to enter the into the "Proposal Constraints" field:

FLITECAM Spectra: 02_0100 and 75_0001
FLITECAM Imaging: 75_0002
FORCAST Grism Spectra: 75_0003
FORCAST Imaging: 75_0002

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