GCN Circular 1245
Subject
GRB020127 Optical Observations
Event
Date
2002-02-06T02:00:48Z (24 years ago)
From
Brian Lee at Fermilab <bclee@fnal.gov>
B. C. Lee, D. Q. Lamb, R. J. McMillan, D. G. York and D. E. Vanden Berk,
on behalf of the SDSS GRB team, report:
The field of GRB020127 (= H1902) (Ricker et al., GCN 1229) was
observed by the SDSS in two interlaced runs on 2001 December 18.34 and
19.30 UTC in the normal course of SDSS operations. We have examined
the SDSS u* g* r* i* z* images in the vicinity of the eleven probable
X-ray sources seen in the first Chandra follow-up observation (Fox,
GCN 1241) that lie near or within the joint HETE-IPN localization
(Hurley et al., GCN 1232). The tables below list the properties of
the objects we find that lie closest to the locations of the probable
X-ray sources. The distance to the X-ray source position (col 3) is
listed in arcseconds. SDSS RMS astrometric errors are 0.1 arcsec or
less.
------------------------------------------------------------------------------
Nearest
X-ray Optical RA Dec Distance Photo r* mag Comment
Source Source (deg) (deg) (arcsec) Class
------------------------------------------------------------------------------
cxo01 sdss01 123.67710 36.81988 0.86 star 20.22+/-0.02 Probable QSO
cxo02 sdss02 123.70650 36.72886 29.68 galaxy 22.84+/-0.28 Too faint
cxo03 sdss03 123.82472 36.65235 3.67 galaxy 21.39+/-0.06 QSO colors
cxo04 sdss04 123.85118 36.68411 1.94 galaxy 19.77+/-0.02
cxo05 sdss05 123.86302 36.68097 2.71 galaxy 22.76+/-0.18 Too faint
cxo06 sdss06 123.86641 36.82857 2.36 galaxy 21.44+/-0.06
cxo07 sdss07 123.88969 36.77076 0.65 star 20.33+/-0.03 Probable QSO
cxo08 sdss08 123.91376 36.79532 6.16 ------ 15.06+/-0.01 Saturated star
cxo09 sdss09 123.92058 36.72213 3.35 galaxy 22.71+/-0.18 Too faint
cxo10 sdss10 123.92700 36.75947 2.01 ------ 14.90+/-0.01 Saturated star
cxo11 sdss11 123.93778 36.68775 4.56 galaxy 22.20+/-0.11 Too faint
------------------------------------------------------------------------------
Table notes:
Photo class: the SDSS photometric pipeline's morphological classification.
Star = PSF like, galaxy = extended.
Probable QSO/QSO colors: This object's colors are similar to that of a
QSO.
Too faint: This object is faint enough that classification,
magnitudes, and colors are likely to be unreliable.
Saturated: This object is saturated in one or more filters. Position,
magnitudes, and photo class are unreliable.
------------------------------------------------------------------------------
Photo
sdss Class r* u*-g* g*-r* r*-i* i*-z*
------------------------------------------------------------------------------
01 star 20.22+/-0.02 0.37+/-0.05 0.05+/-0.03 0.02+/-0.04 0.20+/-0.09
02** galaxy 22.84+/-0.28 -0.37+/-0.54 1.26+/-0.40 0.25+/-0.33 -0.01+/-0.47
03 galaxy 21.39+/-0.06 -0.19+/-0.15 0.42+/-0.09 0.14+/-0.09 0.38+/-0.18
04 galaxy 19.77+/-0.02 1.38+/-0.15 0.58+/-0.03 0.47+/-0.03 0.13+/-0.05
05** galaxy 22.76+/-0.18 -0.05+/-0.71 0.45+/-0.27 0.26+/-0.26 0.93+/-0.34
06 galaxy 21.44+/-0.06 0.23+/-0.28 0.80+/-0.11 0.14+/-0.09 0.34+/-0.19
07 star 20.33+/-0.03 0.19+/-0.07 0.10+/-0.04 0.27+/-0.04 -0.01+/-0.09
08** ------ 15.06+/-0.01 -2.08+/-0.03 0.01+/-0.02 0.14+/-0.02 1.87+/-0.02
09** galaxy 22.71+/-0.18 -0.72+/-0.38 0.64+/-0.29 0.71+/-0.22 -0.05+/-0.42
10** ------ 14.90+/-0.01 -0.15+/-0.03 -0.09+/-0.02 0.32+/-0.02 2.46+/-0.02
11** galaxy 22.20+/-0.11 0.95+/-0.69 0.53+/-0.18 0.91+/-0.13 0.62+/-0.16
------------------------------------------------------------------------------
Table note:
** Saturated or faint star: magnitudes, colors, classification and
(for saturated stars) position are unreliable.
--
Brian C. Lee - bclee@fnal.gov - 630-840-6646
Fermilab MS 127 WH7W - PO Box 500 - Batavia IL 60510-0500
---------------- http://home.fnal.gov/~bclee/ ---------------