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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36275 results found.

  1. GRB 990123: New Optical Observations, Decay Measure
  2. GRB 990123 Optical Follow-Up
  3. GRB 990123: Possible Gravitationally Lensed Burst?
  4. GRB 990123 optical observations
  5. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  6. GRB 990123 radio observations
  7. GRB 990123, new radio source
  8. GRB990123, Optical observation
  9. GRB 990123: Optical Decay Slope
  10. GRB 990123 r-band photometry
  11. GRB 990123 Optical Follow-up
  12. GRB990123, early optical counterpart detection
  13. GRB990123 Optical Observation
  14. GRB 990123: Bright New Source, Possible Optical Transient
  15. GRB 990123, Radio observations
  16. SN 1999E & GRB 980919
  17. Possible identification of SN1999E with GRB980910
  18. Optical Observations of GRB 981220
  19. GRB 981226: radio variable
  20. GRB981220
  21. GRB981220, Optical Observations
  22. GRB 981220 Optical observations
  23. GRB 981226 Optical Observations
  24. GRB 980613: Spectroscopy of the host galaxy
  25. GRB981226, sub-millimeter observations
  26. GRB981220, sub-millimeter observations
  27. GRB 981220 and GRB 981226, optical observations
  28. GRB 981226 radio observations
  29. GRB 981226
  30. GRB 981226 optical observations
  31. radio observations of GRB 981226
  32. GRB981220 B, R and I band observations
  33. GRB 981220:Optical Observations
  34. GRB 981220 optical R and I observations
  35. GRB981226, BeppoSAX Christmas GRB
  36. GRB 981226 - Infrared Observations
  37. GRB 981226 optical observations
  38. GRB 981220
  39. GRB 981220, radio observations
  40. GRB981226 Optical Observation
  41. GRB 981220, radio observations
  42. GRB 981220: BeppoSAX/GRBM results
  43. GRB981220 I-band Observations
  44. GRB 981220
  45. GRB 981220 Optical Observations
  46. GRB 981220, optical observations
  47. GRB 980326/Host Galaxy
  48. GRB981220 IPN error box
  49. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  50. GRB980329 R,I flux calibration and R,I,K upper limits
  51. GRB980425: X-ray revised positions
  52. GRB 980923 BATSE Observations
  53. GRB980703 Very Long Baseline Interferometry
  54. GRB970508 optical observations
  55. GRB971214, association with a Galactic star?
  56. Optical Observations of the Host Galaxy of GRB 980519
  57. GRB980519, Optical Observations
  58. GRB980703, Host galaxy multicolor photometry
  59. GRB980703 - BeppoSAX/GRBM detection
  60. GRB 980703 (NFI observations)
  61. GRB980703 optical photometry
  62. GRB 980703: BATSE Observations
  63. GRB980703: Radio transient
  64. GRB980703 H-band Observations
  65. GRB 980703: Spectrum of the proposed optical counterpart
  66. RXTE Observation of GRB 980706
  67. GRB980703: Spectrum of the proposed optical counterpart
  68. GRB980703 Transient Optical Follow-Up
  69. GRB980703: LOTIS observation at early times
  70. GRB980613 Optical Observations
  71. GRB 980703
  72. GRB 980703 H-band Observations
  73. GRB980703 (optical R observations)
  74. GRB980706
  75. GRB980703: radio source/optical transient
  76. BeppoSAX NFI observations of GRB 980703
  77. GRB 980703: ASM Position & Intensity
  78. GRB980703
  79. GRB980703 optical followup
  80. GRB 980613 Near-IR observations
  81. GRB980613, optical observations
  82. GRB 980613: Optical transient and its host galaxy
  83. GRB 980613: Detection of the probable host galaxy
  84. GRB 980613: BATSE Observations
  85. GRB 980613 Optical Observations
  86. GRB 980613 optical observations
  87. GRB980613 Optical Observations
  88. GRB980613 observations from Palomar
  89. GRB980613 BeppoSAX-NFI follow up
  90. GRB 980613 new optical/IR observations
  91. GRB 980613 optical/IR obs.
  92. GRB980613 Near Infra-Red Observations
  93. GRB980611
  94. GRB980613, BeppoSAX WFC positions
  95. GRB971214 Secondary Standards
  96. GRB980519 Secondary Standards
  97. BATSE on-board GRB trigger change
  98. GRB 980519 Optical Observations
  99. GRB980519 optical observations
  100. GRB 980519

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