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GCN Circular 8325

Subject
AXP 1E 1547.0-5408: Swift/UVOT Upper Limits
Date
2008-10-04T20:26:11Z (16 years ago)
From
Stephen Holland at USRA/NASA/GSFC/SSC <sholland@milkyway.gsfc.nasa.gov>
S. T. Holland (CRESST/GSFC/USRA) and H. Krimm (CRESST/USRA/GSFC)
report on the behalf of the Swift UVOT team:

       The Swift/UVOT observed the field of the anomalous X-ray pulsar
1E 1547.0-5408 starting 63 s after the first BAT trigger (Krimm et
al. 2008, GCN Circ. 8311).  We do not find any new source, relative to
the DSS, at the location of the XRT source.  The 3-sigma upper limits
for detecting a source are:

Filter     T_start     T_stop     Exp(s)     Mag
------------------------------------------------
    v           188        588        373   >19.8
    v           188       6183        982   >20.4
    b           668       7003        412   >20.7
    u           643       6798        432   >20.3
  uvw1          619       6593        252   >20.2
  uvm2          594       6388        255   >20.0
  uvw2          699       7222        243   >20.2
  white          82        182         98   >20.7
  white          82       7208        609   >21.7
------------------------------------------------

The quoted upper limits have not been corrected for the expected, and
highly uncertain, Galactic extinction along the line of sight
corresponding to a reddening of E_{B-V} = 16.7 mag (Schlegel, et al.,
1998, ApJS, 500, 525).  All photometry is on the UVOT flight system
described in Poole et al. (2008, MNRAS, 383, 627).
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