TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3449
SUBJECT: XRF050522: Optical Observations
DATE:    05/05/22 15:17:07 GMT
FROM:    Aaron Price at AAVSO  <aaronp@aavso.org>

B. L. Gary (Hereford Arizona Observatory [G95]) and A. Price (AAVSO) report
on behalf of the AAVSO International High Energy Network on early optical
observations of XRF 050522 (GCN 3446; Gotz et al.):

No afterglow candidate is found in the field compared to DSS to a limiting
unfiltered magnitude of 18.7. Observation midpoint time was 06:38 UT (38
minutes after burst) on May 22, 2005. Details of the observation are below
along with a link to the FITS image.

The AAVSO thanks the Curry Foundation for their continued support of the 
AAVSO International High Energy Network.

 Observer: Bruce Gary (GBL)
 Site: Hereford Arizona Observatory (G95)
 Location: Sierra Vista, AZ; USA
 LatitudeLongitude: +31.45, -110.24
 Elevation: 1420 m
 Scope: Celestron CGE-1400, 0.35 m SCT
 ScopeFocalRatio: f/1.86, 661 mm (prime focus)
 CCDVendor: SBIG ST-8XE
 CCDDetector: KAF1602E
 CCDSize: 1530 x 1020
 CCDPixelScale: 2.80 "arc/pixel
 CCDFOV: 72 x 48 'arc
 Object: GRB050522
 ObsDate: 2005.05.22
 ObsMidPointTime: 06:38 UT
 TimePerFrame: 120 sec
 NumberOfFrames: 16
 Filters: Clear
 Processing: dark/flat/mediancombine
 Seeing: 3 "arc FHWM
 LimitingMag: 19.0 (SNR=3)
 Sky: Clear, calm
 afterglowmag: <18.7
 afterglowerr:
 compstars: All-sky
 Report: No new objects present when blinking with DSS image having similar 
limiting magnitude, for 20 'arc square FOV centered on GCN 3446 center 
coordinates; all stars brighter than 18.7 were accounted for in DSS. Image 
made 38 minutes after burst.
 comments:

A FITS image has been uploaded to 
ftp://ftp.aavso.org/grb/BruceGary_GRB050522_2453512.81830_.fits