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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"

38418 results found.

  1. GRB 990123: near-infrared observations.
  2. GRB990123, OSSE observations
  3. GRB 990123: Strong MeV CGRO-COMPTEL detection now posted on WWW
  4. GRB990123: NIR Observation
  5. "GRB 990123: New BV Observations"
  6. GRB 990123 Optical Follow-Up
  7. GRB 990123: BATSE Observations
  8. GRB 990123 Keck Spectrum update
  9. GRB990123 IPN annulus
  10. GRB 990123 : Multiple and Distorted Images of the Host Galaxy?
  11. GRB 990123 Spectroscopic Redshifts
  12. GRB 990123: New Optical Observations, Decay Measure
  13. GRB 990123 Optical Follow-Up
  14. GRB 990123: Possible Gravitationally Lensed Burst?
  15. GRB990123, optical observation
  16. GRB 990123 optical observations
  17. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  18. GRB 990123 radio observations
  19. GRB 990123, new radio source
  20. GRB990123 optical observations
  21. GRB990123, Optical observation
  22. GRB 990123: Optical Decay Slope
  23. GRB 990123 r-band photometry
  24. GRB 990123 Optical Follow-up
  25. GRB990123, early optical counterpart detection
  26. GRB990123 Optical Observation
  27. GRB990123, BeppoSAX-NFI X-ray afterglow detection
  28. GRB990123, refined SAX-WFC position
  29. GRB 990123: Bright New Source, Possible Optical Transient
  30. GRB 990123, Radio observations
  31. GRB990123, BeppoSAX WFC detection and NFI planned follow-up
  32. Possible identification of SN1999E with GRB980910
  33. Optical Observations of GRB 981220
  34. GRB 981226: radio variable
  35. GRB981220
  36. GRB981220, Optical Observations
  37. GRB 981220 Optical observations
  38. GRB 981226 Optical Observations
  39. GRB 980613: Spectroscopy of the host galaxy
  40. GRB981226, sub-millimeter observations
  41. GRB981220, sub-millimeter observations
  42. GRB 981220 and GRB 981226, optical observations
  43. GRB981226 Optical Observations
  44. GRB981226 BeppoSAX follow up
  45. GRB 981226 radio observations
  46. GRB 981226
  47. GRB 981226 optical observations
  48. radio observations of GRB 981226
  49. GRB981220 B, R and I band observations
  50. GRB981226, BeppoSAX-NFI follow-up
  51. Optical Observations of GRB981226
  52. GRB 981220:Optical Observations
  53. GRB981226, BeppoSAX Christmas GRB
  54. GRB 981226 - Infrared Observations
  55. GRB 981220
  56. GRB 981220, radio observations
  57. GRB981226 Optical Observation
  58. GRB 981220, radio observations
  59. GRB 981220: BeppoSAX/GRBM results
  60. GRB981220 I-band Observations
  61. GRB981220 Optical Observations
  62. GRB 981220
  63. GRB 981220 Optical Observations
  64. GRB 981220, optical observations
  65. GRB 980326/Host Galaxy
  66. GRB981220 IPN error box
  67. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  68. BeppoSAX NFI Observation of GRB980425
  69. GRB980329 R,I flux calibration and R,I,K upper limits
  70. GRB980425 Optical Follow-up
  71. GRB 980923 BATSE Observations
  72. SGR1900+14, BeppoSAX-GRBM observations
  73. GRB980703 Very Long Baseline Interferometry
  74. GRB970508 optical observations
  75. Optical Observations of the Host Galaxy of GRB 980519
  76. GRB980519, Optical Observations
  77. GRB980703, Host galaxy multicolor photometry
  78. GRB980703 - BeppoSAX/GRBM detection
  79. GRB 980703 (NFI observations)
  80. GRB980703 optical photometry
  81. GRB 980703: BATSE Observations
  82. GRB980703 optical observations
  83. GRB980703: Radio transient
  84. GRB980703 H-band Observations
  85. GRB 980703: Spectrum of the proposed optical counterpart
  86. RXTE Observation of GRB 980706
  87. GRB980703: Spectrum of the proposed optical counterpart
  88. GRB980703 Transient Optical Follow-Up
  89. GRB980703: LOTIS observation at early times
  90. GRB980613 Optical Observations
  91. GRB 980703
  92. GRB980703 (I band observations)
  93. GRB 980703 H-band Observations
  94. GRB980703 (optical R observations)
  95. GRB980706
  96. GRB980703: radio source/optical transient
  97. BeppoSAX NFI observations of GRB 980703
  98. GRB 980703: ASM Position & Intensity
  99. GRB980703
  100. GRB980519 observation report

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