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GCN Circular 2549

GRB040223: Deep NIR NTT data re-analysis
2004-03-18T14:48:32Z (20 years ago)
Gianpiero Tagliaferri at OAB-INAF <>
A. Simoncelli, P. D'Avanzo, S. Campana, S. Covino, D. Fugazza,
A. Cucchiara, S. Kalogerakos, G. Tagliaferri, F.M. Zerbi (INAF-OAB);
G. Chincarini  (UNIMIB & INAF-OAB); G.L. Israel, L. Stella (INAF-OAR); 
D. Malesani (SISSA); A. De Luca (IASF, Milan) on behalf of a larger 
collaboration report: 

Following the improved position for the likely afterglow of GRB 
040223 (GCN 2525) provided by De Luca et al. (GCN 2547), we 
re-analysed our NTT + SofI data (JHKs filters, Tagliaferri et 
al. GCN 2535).

Inside the new error circle (99% confidence, 4.5'' radius) 
we found 13 objects: no one of these presents a typical afterglow 
behaviour (i.e. a monotonic decay).

For a list of these objects please refer to the table at the
following URL
Objects within the error circle are identified with ID 1, 10, 12, 14, 
16, 19, 20, 21, 23, 24, 25, 30, 32.
Limiting Ks magnitude is found to be ~ 20 (referred to the 2MASS catalog).

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