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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"

36186 results found.

  1. GRB 110719A: GRT Optical Observation
  2. GRB 110719A: optical limit by "Pi of the Sky"
  3. GRB 110719A: z-band upper limit
  4. Swift/UVOT observations of GRB110719A
  5. GRB 110719A: Swift-XRT refined Analysis
  6. GRB 110719A: optical upper limit
  7. GRB 110719A: Enhanced Swift-XRT position
  8. GRB 110719A: Swift-BAT refined analysis
  9. GRB 110715A optical observations
  10. GRB 110719A: Swift detection of a burst
  11. GRB 110709B : Suzaku WAM observation of the prompt emission
  12. GRB 110715A: ATCA detection of the radio counterpart
  13. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  14. GRB 110715A: APEX detection of the submm counterpart
  15. Konus-Wind observation of GRB 110715A
  16. GRB 110715A: Swift-XRT refined Analysis
  17. GRB110715A: VLT redshift
  18. GRB 110715A: Swift/UVOT Detection
  19. GRB 110715A: Enhanced Swift-XRT position
  20. GRB 110715A: Swift-BAT refined analysis
  21. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  22. GRB 110709B: Swift/UVOT Observations
  23. GRB 110709A / EVLA upper limits
  24. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  25. Swift trigger 457076 is not a GRB
  26. Konus-Wind observation of GRB 110708B
  27. GRB 110709A: Suzaku WAM observation of the prompt emission
  28. GRB 110709B: Submm observations from APEX
  29. IPN triangulation of GRB 110708B (long duration, extremely intense)
  30. Swift Trigger 457076: a possible GRB
  31. GRB 110709A: Swift/UVOT Upper Limits
  32. Fermi Gamma-ray Burst Monitor trigger 332078586 is not a GRB
  33. GRB 110709A: Konkoly observations
  34. GRB 110708A: Konkoly observations
  35. GRB 110709B BAT refined analysis
  36. GRB 110709B: burst detection from Swift-BAT slew data
  37. GRB 110709B: Swift-XRT refined Analysis
  38. GRB 110709A: Swift-XRT refined Analysis
  39. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  40. GRB110709A: MITSuME Ishigakijima Optical upper limits
  41. Konus-Wind observation of GRB 110709A
  42. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  43. GRB 110709B: Enhanced Swift-XRT position
  44. Konus-Wind observation of GRB 110709B
  45. GRB 110709A: Fermi GBM observation
  46. GRB 110709B: Gemini-South additional analysis and photometry
  47. GRB 110709B : A possible source in USNO B 1.0
  48. GRB 110709B: Preliminary Swift-BAT refined analysis
  49. GRB 110709B: GROND Detection of an Afterglow Candidate
  50. GRB 110709B: Gemini-South optical observations
  51. GRB 110709A: Swift-BAT refined analysis
  52. GRB 110709B: possible quiescent source in DSS
  53. GRB 110709A : Xinglong TNT upper limit
  54. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  55. GRB 110709A: Enhanced Swift-XRT position
  56. GRB 110709B: Swift detection of a burst
  57. GRB 110708A: Swift/UVOT Observations
  58. GRB 110709A: MASTER-NET optical observations
  59. GRB 110709A: Prompt enhanced Swift-XRT position
  60. GRB 110709A: Swift detection of a burst
  61. GRB 110708A: Liverpool Telescope observations
  62. GRB 110708A: Lick observations
  63. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  64. GRB 110705A: Suzaku WAM observation of the prompt emission
  65. GRB 110625A, the review of the sky area in plate archives
  66. GRB 110708A: a long GRB detected by INTEGRAL
  67. Konus-Wind observation of GRB 110705A
  68. IPN triangulation of short hard GRB 110705A
  69. GRB 110705A: Fermi GBM detection
  70. GRB 110625A: Suzaku WAM observation of the prompt emission
  71. GRB 110625A: Fermi GBM and LAT observations
  72. GRB 110625A: Swift/UVOT Upper Limits
  73. GRB 110625A: 1.23m CAHA I-band observations
  74. GRB 110625A: Fermi LAT detection
  75. GRB 110625A: GROND detection of a source inside the XRT error circle
  76. GRB 110625A: NIR Source
  77. GRB 110625A: Konkoly observations
  78. Konus-Wind observation of GRB 110625A
  79. GRB 110625A: Swift-XRT refined Analysis
  80. GRB 110625A: Swift-BAT refined analysis
  81. GRB 110625A: ROTSE-III Optical Limits
  82. GRB 110625A: Swift detection of a burst
  83. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  84. Swift J185003.2-005627: TAROT Calern observatory optical observations
  85. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  86. GRB 110618A: SMARTS optical observations
  87. GRB 110604A: final update on Swift-XRT observations
  88. Konus-Wind observation of GRB 110618A
  89. IPN triangulation of GRB110618A (long duration, extremely intense)
  90. Fermi Gamma-ray Burst Monitor trigger 110621949 is not a GRB
  91. GRB 110604A: Suzaku WAM observation of the prompt emission
  92. GRB 110610A: Suzaku WAM observation of the prompt emission
  93. GRB 110610A: Fermi GBM detection
  94. GRB 110610A: 1.23m CAHA optical observations
  95. GRB 110610A: Swift-XRT refined Analysis
  96. GRB 110610A: Swift/UVOT Upper Limits
  97. GRB 110610A: Enhanced Swift-XRT position
  98. GRB 110610A: Swift-BAT refined analysis
  99. Swift detection of the X-ray afterglow of GRB 110604A
  100. GRB 110610A: MASTER-NET optical observations

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