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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"

37752 results found.

  1. GRB 110731A: Swift-BAT refined analysis
  2. GRB 110731A: FTN+FTS afterglow observations
  3. GRB 110731A: Swift detection of a burst with an optical counterpart
  4. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  5. GRB 110721A: Swift observations of afterglow candidate
  6. GRB 110726A: optical upper limit in CrAO
  7. GRB 110726A: EVLA observations
  8. GRB 110726A: IAC80 R-band observations
  9. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  10. GRB110726A: MITSuME Ishigakijima Optical Observation
  11. GRB 110726A: Further Swift/UVOT Observations
  12. GRB110726A: Gemini-N tentative redshift
  13. GRB 110726A: Swift-BAT refined analysis
  14. GRB 110726A: Enhanced Swift-XRT position
  15. GRB 110726A: Swift/UVOT Detection
  16. GRB 110726A: Liverpool Telescope observations
  17. GRB 110726: ROTSE-III Detection of Optical Counterpart
  18. GRB 110726A: Swift detection of a burst
  19. IPN triangulation of GRB 110721A
  20. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  21. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  22. GRB 110721A: potential counterpart candidate
  23. Konus-Wind observation of GRB 110721A
  24. GRB 110709B / EVLA detection of radio counterpart
  25. GRB 110719A / SMA 345 GHz upper limits
  26. GRB 110721A: Fermi-LAT detection
  27. GRB 110721A: Fermi GBM detection
  28. GRB110715A: spectral lag analysis
  29. GRB 110715A : Suzaku WAM observation of the prompt emission
  30. GRB 110719A: GRT Optical Observation
  31. GRB 110719A: optical limit by "Pi of the Sky"
  32. GRB 110719A: z-band upper limit
  33. Swift/UVOT observations of GRB110719A
  34. Swift J1822.3-1606 : Fermi GBM observation
  35. GRB 110719A: Swift-XRT refined Analysis
  36. GRB 110719A: optical upper limit
  37. GRB 110719A: Enhanced Swift-XRT position
  38. GRB 110719A: Swift-BAT refined analysis
  39. GRB 110715A optical observations
  40. GRB 110719A: Swift detection of a burst
  41. GRB 110709B : Suzaku WAM observation of the prompt emission
  42. GRB 110715A: ATCA detection of the radio counterpart
  43. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  44. GRB 110715A: APEX detection of the submm counterpart
  45. Konus-Wind observation of GRB 110715A
  46. GRB 110715A: Swift-XRT refined Analysis
  47. GRB110715A: VLT redshift
  48. GRB 110715A: Swift/UVOT Detection
  49. GRB 110715A: Enhanced Swift-XRT position
  50. GRB 110715A: Swift-BAT refined analysis
  51. Swift J1822.3-1606: A Probable New SGR in Ground Analysis of BAT Data
  52. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  53. GRB 110709B: Swift/UVOT Observations
  54. GRB 110709A / EVLA upper limits
  55. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  56. Swift trigger 457076 is not a GRB
  57. Konus-Wind observation of GRB 110708B
  58. GRB 110709A: Suzaku WAM observation of the prompt emission
  59. GRB 110709B: Submm observations from APEX
  60. IPN triangulation of GRB 110708B (long duration, extremely intense)
  61. Swift Trigger 457076: a possible GRB
  62. GRB 110709A: Swift/UVOT Upper Limits
  63. Fermi Gamma-ray Burst Monitor trigger 332078586 is not a GRB
  64. GRB 110709A: Konkoly observations
  65. GRB 110708A: Konkoly observations
  66. GRB 110709B BAT refined analysis
  67. GRB 110709B: burst detection from Swift-BAT slew data
  68. GRB 110709B: Swift-XRT refined Analysis
  69. GRB 110709A: Swift-XRT refined Analysis
  70. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  71. GRB110709A: MITSuME Ishigakijima Optical upper limits
  72. Konus-Wind observation of GRB 110709A
  73. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  74. GRB 110709B: Enhanced Swift-XRT position
  75. Konus-Wind observation of GRB 110709B
  76. GRB 110709A: Fermi GBM observation
  77. GRB 110709B: Gemini-South additional analysis and photometry
  78. GRB 110709B : A possible source in USNO B 1.0
  79. GRB 110709B: Preliminary Swift-BAT refined analysis
  80. GRB 110709B: GROND Detection of an Afterglow Candidate
  81. GRB 110709B: Gemini-South optical observations
  82. GRB 110709A: Swift-BAT refined analysis
  83. GRB 110709B: possible quiescent source in DSS
  84. GRB 110709A : Xinglong TNT upper limit
  85. GRB 110709B: Swift detection of renewed activity at T+11 minutes.
  86. GRB 110709A: Enhanced Swift-XRT position
  87. GRB 110709B: Swift detection of a burst
  88. GRB 110708A: Swift/UVOT Observations
  89. GRB 110709A: MASTER-NET optical observations
  90. GRB 110709A: Prompt enhanced Swift-XRT position
  91. GRB 110709A: Swift detection of a burst
  92. GRB 110708A: Liverpool Telescope observations
  93. GRB 110708A: Lick observations
  94. GRB 110708A: Swift/XRT afterglow candidate for the INTEGRAL burst
  95. GRB 110705A: Suzaku WAM observation of the prompt emission
  96. GRB 110625A, the review of the sky area in plate archives
  97. GRB 110708A: a long GRB detected by INTEGRAL
  98. Konus-Wind observation of GRB 110705A
  99. IPN triangulation of short hard GRB 110705A
  100. GRB 110705A: Fermi GBM detection

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