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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"

43043 results found.

  1. GRB 110709B: GROND Detection of an Afterglow Candidate
  2. GRB 110709B: Gemini-South optical observations
  3. GRB 110709A: Swift-BAT refined analysis
  4. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  5. GRB 110709A: Enhanced Swift-XRT position
  6. GRB 110709B: Swift detection of a burst
  7. GRB 110708A: Swift/UVOT Observations
  8. GRB 110709A: MASTER-NET optical observations
  9. GRB 110709A: Prompt enhanced Swift-XRT position
  10. GRB 110709A: Swift detection of a burst
  11. GRB 110708A: Lick observations
  12. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  13. GRB 110705A: Suzaku WAM observation of the prompt emission
  14. GRB 110625A, the review of the sky area in plate archives
  15. GRB 110708A: a long GRB detected by INTEGRAL
  16. Konus-Wind observation of GRB 110705A
  17. IPN triangulation of short hard GRB 110705A
  18. Swift trigger 456780 is not a burst
  19. GRB 110705A: Fermi GBM detection
  20. Swift Trigger 456659 is probably not astrophysical
  21. Swift-BAT trigger 456532 is not astrophysical
  22. SGR 1E 1841-045: early optical limit by "Pi of the Sky"
  23. SGR 1E 1841-045: Swift-BAT refined analysis
  24. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  25. GRB 110625A: Suzaku WAM observation of the prompt emission
  26. Swift J185003.2-005627: 1.23m CAHA and BOOTES-3 observations
  27. GRB 110625A: Fermi GBM and LAT observations
  28. GRB 110625A: Swift/UVOT Upper Limits
  29. GRB 110625A: 1.23m CAHA I-band observations
  30. GRB 110625A: Fermi LAT detection
  31. GRB 110625A: GROND detection of a source inside the XRT error circle
  32. GRB 110625A: NIR Source
  33. Konus-Wind observation of GRB 110625A
  34. GRB 110625A: Swift-XRT refined Analysis
  35. GRB 110625A: Swift-BAT refined analysis
  36. Swift J185003.2-005627: NIR Observation
  37. GRB 110625A: ROTSE-III Optical Limits
  38. GRB 110625A: Swift detection of a burst
  39. Swift J185003.2-005627: Swift-XRT/UVOT refined analysis
  40. Swift J185003.2-005627: Swift-BAT refined analysis
  41. Swift J185003.2-005627: TAROT La Silla observatory optical observations
  42. Swift J185003.2-005627: TAROT Calern observatory optical observations
  43. Swift J185003.2-005627: Swift detection of a burst from a new Galactic transient
  44. SGR 1E 1841-045: Swift-BAT refined analysis
  45. GRB 110604A: final update on Swift-XRT observations
  46. SGR 1E 1841-045: Swift detection of a soft gamma repeater burst
  47. Konus-Wind observation of GRB 110618A
  48. IPN triangulation of GRB110618A (long duration, extremely intense)
  49. GRB 110604A: Suzaku WAM observation of the prompt emission
  50. GRB 110610A: Suzaku WAM observation of the prompt emission
  51. GRB 110610A: Fermi GBM detection
  52. GRB 110610A: 1.23m CAHA optical observations
  53. GRB 110610A: Swift-XRT refined Analysis
  54. GRB 110610A: Enhanced Swift-XRT position
  55. GRB 110610A: Swift-BAT refined analysis
  56. Swift detection of the X-ray afterglow of GRB 110604A
  57. GRB 110610A: MASTER-NET optical observations
  58. GRB 110610A: Swift detection of a burst
  59. Konus-Wind observation of GRB 110604A
  60. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  61. GRB 110530A: optical observations in Mondy observatory
  62. GRB 110529A: Suzaku WAM observation of the prompt emission
  63. GMRT detection of GRB 110328A
  64. GRB 110530A: optical observations at Mt. Terskol, second epoch
  65. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  66. GRB 110530A: Enhanced Swift-XRT position
  67. GRB 110530A: NOT optical observations
  68. GRB110530A: MITSuME Okayama Optical Observation
  69. GRB 110530A: optical observations at Mt. Terskol
  70. GRB 110530A: MASTER OT observations
  71. GRB 110530A: Swift-BAT refined analysis
  72. GRB 110530A: MITSuME Akeno Optical Observation
  73. GRB 110529A: Fermi GBM detection
  74. GRB 110530A: Swift detection of a burst with an optical afterglow
  75. Konus-Wind observation of GRB 110529A
  76. LAT Observations of GRB110529A
  77. EVLA afterglow limits on the high z GRB090429B
  78. Swift J1644+57/GRB 110328A, Additional HST Observations
  79. GRB 110521A: MASTER prompt optical limit
  80. GRB 110521A: Swift/UVOT Upper Limits
  81. GRB 110521A: Swift-XRT refined analysis
  82. GRB 110520A: NOT optical follow-ups
  83. GRB 110521A - NOT optical observation
  84. GRB 110521A: Swift-BAT refined analysis
  85. GRB 110521A: Enhanced Swift-XRT position
  86. GRB 110521A: MASTER synchronous and early optical observations limit
  87. Swift/UVOT observations of GRB110520A
  88. GRB 110521A: Swift detection of a burst
  89. GRB 110520A: Swift-BAT refined analysis
  90. GRB 110520A: IAC80 I-band observations
  91. GRB 110520A: Swift-XRT refined Analysis
  92. GRB 110520A: Enhanced Swift-XRT position
  93. GRB 110520A: WHT IR observations
  94. GRB 110520A - NOT optical observation
  95. GRB 110520A: Skynet/DAO optical observations
  96. GRB 110520A: Liverpool Telescope Observations
  97. GRB 110520A: TAROT Calern observatory optical observations
  98. GRB 110520A: MASTER-NET optical observations
  99. GRB 110520A: Swift detection of a burst
  100. Konus-Wind observation of GRB 110518A

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