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GCN Circular 16757

Subject
GRB140818B, the review of the sky area in plate archives
Date
2014-08-30T19:39:14Z (10 years ago)
From
Valentyna Golovnya at Main Astro Obs,Kyiv <golov_v@ukr.ne>
V.V. Golovnya (Main Astro Obs, Kyiv) 
report: 
We have undertaken the review of the sky area in vicinity of 
GRB140818B (Vargas et al., GCN 16709; Beardmore et al., 
GCN 16712) on astronegatives, collected in Ukrainian NAS 
Main astronomical observatory plate archive (1976-1996). 
All the plates with the possible object appearance are 
digitized using Microtek ScanMaker 9800XL TMA and Epson Expression 10000XL flatbed scanners and have been 
placed into Golosiiv Plate Archive database DBGPA with open 
access to them.��The list of plates is given in the table: 
yyyymmdd/TimeUT --Plates--�������������������������� Exp.��LM����USNOA2 0825 
19910613/222704��GUA040C001802A��22.5��15.9���� -11812892 
19910709/205250��GUA040C001826A��23.5��15.7���� -11814106 
19820715/175441��TAS040A000284������ 23.0��17.3�� ��-11812584 
�� No any object has been found in the point with the mentioned 
coordinates of GRB. But the image of some object have��found near GRB position on the two of selected plates. 
Brighness of the object is estimated as V=15.0 and V=16.5: 
�� Plates���������������������������������� ��RA,(J2000.0),Dec��������������������V 
GUA040C001802A 18:04:32.08 -01:22:57.0 15.0 
TAS040A000284���� ��18:04:32.63 -01:22:55.6 16.5 
Plates:�� 
GUA040C���the plates archive identifier of DWA (D/F=400/2000, 
���������������� M=103"/mm) of the Ukrainian NAS Main Astro obs. 
���������������� (Marsden's number - 83) the plate number [1]. 
TAS040A -the plates archive identifier of DAZ (D/F=400/3000, 
���������������� M=68.8"/mm) of the Tashkent Astro obs. 
���������������� (Marsden's number - 186) the plate number [1]. 
Exp.���� - Duration of the maximum exposure (minutes). 
LM - Limited V mag, derived in the 2,5 arcmin area around 
������������ the location given in GCN Circ.16712: 
������������ RA(J2000): 18h 04m 32.53s, Dec(J2000): -01d 23' 10.6" 
USNOA2 - Comparison star. 
�� The preview images of 3 areas together with�� 
the 2,5x2,5 min.of arc area from SkyMap can be found in�� 
http://gua.db.ukr-vo.org/img/grb/140818B/index.html 
The images with full resolution are available via e-mail on 
demand. 
References: 
1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org
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