We calibrated our observations using standard stars in the SA 107 field (cf. Landolt 1992). We included magnitudes for 11 local standards in our GCN circular. Finding charts are available for the central group of 9 (field of view 1.5 arcminutes) and for all 11 stars (field of view 3.5 arcminutes). North is up and East is at left in these finding charts.
A 4 by 4 arcminute section of the final R and I band images can be obtained in FITS format by anonymous FTP from ftp://gemini.kpno.noao.edu/pub/grb/980329. Note that the instrument's field of view is 36 arcminutes, and so our data cover a much greater area. We can make data covering this full region available to anyone who would like to see them.
If you use this data in a publication, please at least cite our
communication to the GCN (Gamma Ray Burst Coordinate Network).
A standard issue Kitt Peak acknowledgement may also be in order in some
cases, e.g. if you wish to reproduce the image. That acknowledgement
for the optical data is something like:
This work uses data obtained by J. Rhoads on behalf of the KPNO GRB follouwup team using the KPNO 4 meter telescope. Kitt Peak National Observatory, National Optical Astronomy Observatories, is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation.
For the K band data, the acknowledgment would be:
This work uses data obtained by A. Dey, B. Jannuzi, and M. Sosey on behalf of the NOAO Deep Widefield Survey project and the KPNO GRB follouwup team using the KPNO 2.1 meter telescope. Kitt Peak National Observatory, National Optical Astronomy Observatories, is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation.
General comments: The pixel scale is approximately 0.26 arcsec per pixel.
The instrument used for R and I band was the Kitt Peak CCD Mosaic camera.
North is to the left, and East is at the bottom. The stars more than
a few arcseconds north of the GRB location are in a cosmetically poor
region of the chip, and should not be trusted for detailed flux or
astrometric calibrations. There is a world coordinate system in the
The K band image has pixel scale 0.34 arcsec per pixel, and was obtained with the ONIS near-ir camera at the KPNO 2.1 meter telescope.
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