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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"

28250 results found.

  1. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  2. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  3. GRB 130605A: GROND afterglow candidate
  4. GRB 130605A: Swift detection of a burst
  5. GRB 130603B: AMI-LA 15GHz observations
  6. GRB 130604A: Swift/UVOT Upper Limits
  7. Swift Trigger 557466 is probably not real.
  8. GRB 130604A: Swift-XRT refined Analysis
  9. GRB 130604B: Fermi GBM detection
  10. GRB 130603B: RATIR Optical and NIR Observations
  11. GRB 130604A: Enhanced Swift-XRT position
  12. GRB 130603B: P60 Observations
  13. GRB 130604A: MITSuME Okayama upper limits
  14. GRB130603B: Swift/UVOT detection
  15. GRB 130604A: ISON-NM optical upper limit
  16. GRB 130603A: MITSuME Akeno Optical observation
  17. GRB 130604A: Swift detection of a burst
  18. GRB 130603B: 5.8 GHz VLA detection
  19. GRB 130603A: SON optical observations
  20. GRB 130603B: Swift-XRT refined Analysis
  21. GRB 130603B: Gemini Observations
  22. GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
  23. GRB 130603B: Magellan redshift confirmation
  24. GRB 130603B: Afterglow detection from NOT
  25. GRB 130603B: WHT optical afterglow candidate
  26. GRB 130603B: Swift-BAT refined analysis
  27. GRB 130603A: Swift-XRT refined Analysis
  28. GRB 130603B: Enhanced Swift-XRT position
  29. Swift/UVOT observations of GRB130603A
  30. GRB 130603A: Enhanced Swift-XRT position
  31. GRB 130603A: Swift-BAT refined analysis
  32. GRB 130603B: Swift detection of a bright short burst
  33. GRB 130603A: MITSuME Okayama Optical Observation
  34. GRB 130603A: Swift-XRT observations
  35. GRB 130603A: Swift-XRT and Swift-UVOT detections
  36. GRB 130603A: Swift detection of a burst
  37. GRB 130529A: GROND upper limits
  38. GRB 130529A: Swift/UVOT Upper Limits
  39. GRB 130527A: Suzaku WAM observation of the prompt emission
  40. GRB 130529A: Swift-BAT refined analysis
  41. GRB 130518A: Suzaku WAM observation of the prompt emission
  42. GRB 130529A: Swift-XRT refined Analysis
  43. GRB 130529A: Enhanced Swift-XRT position
  44. GRB 130528A: Swift/UVOT Upper Limits
  45. GRB 130528A: Swift-BAT refined analysis
  46. GRB 130529A: Swift detection of a burst
  47. GRB 130528A: Swift-XRT refined Analysis
  48. GRB 130527A: Swift/UVOT Upper Limits
  49. GRB 130528A: Enhanced Swift-XRT position
  50. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  51. GRB 130528A: optical upper limit
  52. GRB 130528A: Swift detection of a burst
  53. GRB 130527A: NOT optical counterpart
  54. GRB 130527A: RATIR Optical and NIR Observations
  55. GRB 130527A: Swift-BAT refined analysis
  56. GRB 130527A: Swift-XRT refined Analysis
  57. GRB 130527A: Enhanced Swift-XRT position
  58. GRB 130527A: Swift detection of a bright burst
  59. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  60. Swift Trigger 556533 is not an astrophysical event
  61. GRB 130521B: Suzaku WAM observation of the prompt emission
  62. Swift Trigger 556533 is probably not an astrophysical event
  63. GRB 130521A: Skynet/PROMPT observations
  64. GRB 130521A, Swift-BAT refined analysis
  65. GRB 130521A: TAROT La Silla observatory optical observations
  66. GRB 130515A: Suzaku WAM observation of the prompt emission
  67. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  68. GRB 130518A: Continued RATIR Optical Observations - Fading
  69. GRB 130518A: Confirmation of the X-ray afterglow.
  70. GRB 130518A: RATIR Optical and NIR Observations
  71. GRB 130518A: Swift XRT and UVOT possible afterglow
  72. GRB 130518A: Fermi GBM detection
  73. VLT observations of GRB 130427A
  74. GRB 130427A: Konkoly optical observations
  75. GRB 130515A: IRSF NIR Observation
  76. GRB 130515A: Further Gemini Observations
  77. Konus-Wind observation of GRB 130515A
  78. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  79. GRB 130514B: RATIR Optical and NIR Observations
  80. GRB 130427A: Skynet detections of a possible supernova
  81. GRB 130515A: Swift-XRT refined Analysis
  82. GRB 130515A: Swift/UVOT Upper Limits
  83. GRB 130514B Swift-BAT observations
  84. GRB 130515A: Swift-BAT refined analysis
  85. GRB 130514B: GROND observations
  86. GRB 130515A: Gemini/GMOS Observations
  87. GRB 130515A: GROND Observations
  88. GRB 130515A: Enhanced Swift-XRT position
  89. GRB 130515A: VLT acquisition observation
  90. GRB 130511A: SSO 2.3m observation
  91. GRB 130514B: Swift-XRT Observations
  92. GRB 130515A: Swift detection of a short burst
  93. GRB 130514A: Swift-XRT refined Analysis
  94. GRB 130514A: Skynet/PROMPT/DSO Detections
  95. GRB 130513A: Bassano Bresciano optical upper limit
  96. GRB 130514A: RATIR Optical and NIR Observations
  97. GRB 130513A: RATIR Optical and NIR Observations
  98. GRB 130513A: Swift/UVOT Upper Limits
  99. GRB 130514A: Swift/UVOT Upper Limits
  100. GRB 130513A: GROND observations

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