Older GCN Circulars Archive

To learn more about the GCN Circulars and how to subscribe.

(Listed in reverse serial number order -- newest first: 299 - 199)

• 299 GRB990506, Observation plan
  
• 298 Refined IPN error box for GRB990506
  
• 297 GRB990506: Limits on the possible optical transient
  
• 296 GRB990506, Armchair astronomy
  
• 295 GRB990506, Optical observations from +1 to +3 hours
  
• 294 GRB990506, Optical observations
  
• 293 GRB990506, Optical observations
  
• 292 GRB990506, Observation plan
  
• 291 New IPN/RXTE error box for GRB990506
  
• 290 IPN localization for GRB990506
  
• 289 GRB970228: Redshift and properties of the host galaxy
  
• 288 IPN localization of GRB990427
  
• 287 GRB981220, VLBA observations
  
• 286 GRB980425, Optical observations of exponential decline at late time
  
• 285 GRB990321, Refined IPN annulus
  
• 284 GRB990323, Precise IPN position
  
• 283 GRB990321, IPN triangulation
  
• 282 GRB990316, Optical observations
  
• 281 GRB990316, Radio observations
  
• 280 GRB990316, Optical observations
  
• 279 GRB990316, Optical observations
  
• 278 GRB990316, Optical observations
  
• 277 GRB990316: Simultaneous optical observation
  
• 276 GRB990316 - Optical null results
  
• 275 ASM/IPN error box for GRB 990308 (BATSE #7457)
  
• 274 GRB990308 not a new SGR
  
• 273 GRB 990308a and GRB 990308b
  
• 272 GRB990308 (Trig. 7457), optical observations
  
• 271 GRB990308, Possible new SGR~0209+70
  
• 270 GRB981220, IPN localization
  
• 269 GRB981220, Radio observations
  
• 268 GRB990123, Field Photometry
  
• 267 GRB990217, Optical Observations
  
• 266 GRB990217, Radio observations
  
• 265 BATSE Resumes Normal Operations
  
• 264 BATSE Flight Anomaly
  
• 263 GRB990217: BeppoSAX/GRBM data
  
• 262 GRB990217, Optical Observations of
  
• 261 GRB990123: Caltech STIS Photometry and Images
  
• 260 GRB990123, Observations
  
• 259 GRB990217, Optical observation
  
• 258 GRB990217, SAX-WFC position
  
• 257 GRB990123, Optical Observation
  
• 256 GRB990123: Discovery of the Probable Host Galaxy
  
• 255 GRB990123: Reduced HST Images
  
• 254 GRB990123, HST Data is Available
  
• 253 GRB990123, Observations
  
• 252 GRB990123: BVRI standards in the field
  
• 251 GRB990123: Updated Keck Spectroscopy Results
  
• 250 GRB981220, Field photometry
  
• 249 GRB990123, NOT Spectrum Update
  
• 248 GRB990123, Optical observation
  
• 247 GRB990123, Is the "radio flare" due to an inhomogeneous medium?
  
• 246 GRB990123, Publicly available reduced HST images
  
• 245 GRB990123, Upcoming HST Service Observations
  
• 244 GRB990123, 15-GHz limits
  
• 243 GRB990123, New Constraints on Possible Foreground Galaxies
  
• 242 GRB990123, Optical Observations
  
• 241 GRB990123, Probability of gravitational lensing
  
• 240 GRB990123, Detection of the IR Transient, and the Light Curve Fits
  
• 239 GRB990123, Continued Radio Observations
  
• 238 GRB990123, Preliminary Lens Search Results
  
• 237 GRB990123, Correction to GCN 230 - C.A. Young added to author list
  
• 236 On the Lensing Interpretation of GRB 990123
  
• 235 Search for Potential Images of GRB 990123
  
• 234 Search for Potential Images of GRB 990123
  
• 233 GRB990123, Optical BVRI Observations
  
• 232 GRB990123, Near-infrared observations
  
• 231 GRB990123, OSSE observations
  
• 230 GRB990123, Strong MeV CGRO-COMPTEL detection now posted on WWW
  
• 229 GRB990123, NIR Observation
  
• 228 GRB990123, ASCA X-ray observation of afterglow
  
• 227 GRB990123, New BV Observations
  
• 226 GRB990123, Optical Follow-Up
  
• 225 GRB990123, Addendum to GCN 223
  
• 224 GRB990123, BATSE Observations
  
• 223 GRB990123, Keck Spectrum update
  
• 222 GRB990123, IPN annulus
  
• 221 GRB990123, Multiple and Distorted Images of the Host Galaxy?
  
• 220 GRB990123, Optical Observations
  
• 219 GRB990123, Spectroscopic Redshifts
  
• 218 GRB990123, New Optical Observations, Decay Measure
  
• 217 GRB990123, Optical Follow-Up
  
• 216 GRB990123, Possible Gravitationally Lensed Burst?
  
• 215 GRB990123, Optical observation
  
• 214 GRB990123, Optical observations
  
• 213 GRB990123, Pre-Burst Detection of an Apparent Host Galaxy
  
• 212 GRB990123, Radio observations
  
• 211 GRB990123, New radio source
  
• 210 GRB990123, Optical observations
  
• 209 GRB990123, Optical observation
  
• 208 GRB990123, Optical Decay Slope
  
• 207 GRB990123, r-band photometry
  
• 206 GRB990123, Optical Follow-up
  
• 205 GRB990123, Early optical counterpart detection
  
• 204 GRB990123, Optical Observation
  
• 203 GRB990123, BeppoSAX-NFI X-ray afterglow detection
  
• 202 GRB990123, Refined SAX-WFC position
  
• 201 GRB990123, Bright New Source, Possible Optical Transient
  
• 200 GRB990123, Radio observations
  
• 199 GRB990123, BeppoSAX WFC detection and NFI planned follow-up
  

Even older entries are in the following tables.

Circulars 100-198   98-06-13 to 99-01-22
Circulars neg4-099   97-02-?? to 98-06-13