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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"

42908 results found.

  1. GRB 130604A: Swift detection of a burst
  2. GRB 130603B: 5.8 GHz VLA detection
  3. GRB 130603A: SON optical observations
  4. GRB 130603B: Swift-XRT refined Analysis
  5. GRB 130603B: Gemini Observations
  6. GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
  7. GRB 130603B: Magellan redshift confirmation
  8. GRB 130603B: Short GRB afterglow spectrum from GTC
  9. GRB 130603B: Afterglow detection from NOT
  10. GRB 130603B: WHT optical afterglow candidate
  11. GRB 130603B: Swift-BAT refined analysis
  12. GRB 130603A: Swift-XRT refined Analysis
  13. GRB 130603B: Enhanced Swift-XRT position
  14. Swift/UVOT observations of GRB130603A
  15. GRB 130603A: Enhanced Swift-XRT position
  16. GRB 130603A: Swift-BAT refined analysis
  17. GRB 130603B: Swift detection of a bright short burst
  18. GRB 130603A: Swift-XRT observations
  19. GRB 130603A: Swift-XRT and Swift-UVOT detections
  20. GRB 130603A: Swift detection of a burst
  21. GRB 130529A: GROND upper limits
  22. GRB 130528A: Fermi GBM detection
  23. GRB 130527A: Suzaku WAM observation of the prompt emission
  24. GRB 130529A: Swift-BAT refined analysis
  25. GRB 130518A: Suzaku WAM observation of the prompt emission
  26. GRB 130529A: Swift-XRT refined Analysis
  27. GRB 130529A: Enhanced Swift-XRT position
  28. Konus-Wind observation of GRB 130528A
  29. Konus-Wind observation of GRB 130527A
  30. GRB 130529A: Prompt enhanced Swift-XRT position
  31. GRB 130528A: Swift-BAT refined analysis
  32. GRB 130529A: Swift detection of a burst
  33. GRB 130528A: Swift-XRT refined Analysis
  34. GRB 130528A: Enhanced Swift-XRT position
  35. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  36. GRB 130528A: optical upper limit
  37. GRB 130528A: Swift detection of a burst
  38. GRB 130527A: NOT optical counterpart
  39. GRB 130527A: RATIR Optical and NIR Observations
  40. GRB 130527A: Swift-BAT refined analysis
  41. GRB 130527A: Swift-XRT refined Analysis
  42. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  43. GRB 130527A: Enhanced Swift-XRT position
  44. GRB 130527A: Prompt enhanced Swift-XRT position
  45. GRB 130527A: Swift detection of a bright burst
  46. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  47. Swift Trigger 556533 is not an astrophysical event
  48. GRB 130521B: Suzaku WAM observation of the prompt emission
  49. Swift Trigger 556533 is probably not an astrophysical event
  50. Konus-Wind observation of GRB 130521B
  51. GRB 130521A: Skynet/PROMPT observations
  52. IPN Triangulation of GRB 130521B
  53. GRB 130514B: Further Swift-XRT Observations
  54. GRB 130518B, Swift-BAT refined analysis
  55. GRB 130521A, Swift-BAT refined analysis
  56. GRB 130521A: TAROT La Silla observatory optical observations
  57. GRB 130521A: Swift detection of a burst
  58. Swift XRT observation of GRB 130518B
  59. GRB 130518A: mm detection at PdBI
  60. GRB 130515A: Suzaku WAM observation of the prompt emission
  61. GRB 130518A: Gemini Redshift confirmation
  62. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  63. GRB 130518A: 10.4m GTC/OSIRIS redshift
  64. GRB 130518A: Continued RATIR Optical Observations - Fading
  65. Correction to GCN Circular 14682 (GRB 130518B)
  66. GRB 130518B found in ground analysis of Swift-BAT data
  67. GRB 130518A: Confirmation of the X-ray afterglow.
  68. GRB 130518A: P60 Afterglow Observations
  69. GRB 130518A: RATIR Optical and NIR Observations
  70. GRB 130518A: Swift XRT and UVOT possible afterglow
  71. Konus-Wind observation of GRB 130518A
  72. GRB 130518A Swift-BAT position from ground analysis
  73. GRB 130518A: Fermi LAT detection
  74. GRB 130518A: Fermi GBM detection
  75. VLT observations of GRB 130427A
  76. GRB 130427A: Konkoly optical observations
  77. GRB 130515A: Further Gemini Observations
  78. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  79. Konus-Wind observation of GRB 130515A
  80. GRB 130515A: FORS2 spectroscopy of candidate counterpart
  81. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  82. GRB 130514B: RATIR Optical and NIR Observations
  83. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  84. GRB 130515A: Fermi GBM detection
  85. GRB 130427A: Skynet detections of a possible supernova
  86. GRB 130515A: Swift-XRT refined Analysis
  87. GRB 130515A: Swift/UVOT Upper Limits
  88. GRB 130514B Swift-BAT observations
  89. GRB 130515A: Swift-BAT refined analysis
  90. GRB 130514B: GROND observations
  91. GRB 130515A: Gemini/GMOS Observations
  92. GRB 130515A: GROND Observations
  93. GRB 130515A: Enhanced Swift-XRT position
  94. GRB 130515A: VLT acquisition observation
  95. GRB 130511A: SSO 2.3m observation
  96. GRB 130514B: Swift-XRT Observations
  97. GRB 130515A: Swift detection of a short burst
  98. GRB 130514A: Swift-XRT refined Analysis
  99. GRB 130514A: Skynet/PROMPT/DSO Detections
  100. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC

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