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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"

21920 results found.

  1. GRB 130603B: AMI-LA 15GHz observations
  2. GRB 130604A: Swift/UVOT Upper Limits
  3. Swift Trigger 557466 is probably not real.
  4. GRB 130604A: Swift-XRT refined Analysis
  5. GRB 130603B: RATIR Optical and NIR Observations
  6. GRB 130604A: Enhanced Swift-XRT position
  7. GRB 130603B: P60 Observations
  8. GRB 130604A: MITSuME Okayama upper limits
  9. GRB130603B: Swift/UVOT detection
  10. GRB 130604A: ISON-NM optical upper limit
  11. GRB 130603A: MITSuME Akeno Optical observation
  12. GRB 130604A: Swift detection of a burst
  13. GRB 130603A: SON optical observations
  14. GRB 130603B: Gemini Observations
  15. GRB 130603B: Magellan redshift confirmation
  16. GRB 130603B: Afterglow detection from NOT
  17. GRB 130603B: WHT optical afterglow candidate
  18. GRB 130603B: Enhanced Swift-XRT position
  19. Swift/UVOT observations of GRB130603A
  20. GRB 130603A: Enhanced Swift-XRT position
  21. GRB 130603B: Swift detection of a bright short burst
  22. GRB 130603A: MITSuME Okayama Optical Observation
  23. GRB 130603A: Swift-XRT observations
  24. GRB 130603A: Swift-XRT and Swift-UVOT detections
  25. GRB 130529A: GROND upper limits
  26. GRB 130529A: Swift/UVOT Upper Limits
  27. GRB 130527A: Suzaku WAM observation of the prompt emission
  28. GRB 130518A: Suzaku WAM observation of the prompt emission
  29. GRB 130529A: Enhanced Swift-XRT position
  30. Konus-Wind observation of GRB 130528A
  31. GRB 130528A: Swift/UVOT Upper Limits
  32. Konus-Wind observation of GRB 130527A
  33. GRB 130529A: Swift detection of a burst
  34. GRB 130527A: Swift/UVOT Upper Limits
  35. GRB 130528A: Enhanced Swift-XRT position
  36. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  37. GRB 130528A: optical upper limit
  38. GRB 130528A: Swift detection of a burst
  39. GRB 130527A: NOT optical counterpart
  40. GRB 130527A: RATIR Optical and NIR Observations
  41. GRB 130527A: Swift-BAT refined analysis
  42. GRB 130527A: Enhanced Swift-XRT position
  43. GRB 130527A: Swift detection of a bright burst
  44. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  45. Swift Trigger 556533 is not an astrophysical event
  46. GRB 130521B: Suzaku WAM observation of the prompt emission
  47. Swift Trigger 556533 is probably not an astrophysical event
  48. Konus-Wind observation of GRB 130521B
  49. GRB 130521A: Skynet/PROMPT observations
  50. GRB 130521A, Swift-BAT refined analysis
  51. GRB 130521A: TAROT La Silla observatory optical observations
  52. GRB 130515A: Suzaku WAM observation of the prompt emission
  53. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  54. GRB 130518A: Continued RATIR Optical Observations - Fading
  55. GRB 130518A: RATIR Optical and NIR Observations
  56. GRB 130518A: Swift XRT and UVOT possible afterglow
  57. Konus-Wind observation of GRB 130518A
  58. GRB 130518A Swift-BAT position from ground analysis
  59. GRB 130518A: Fermi GBM detection
  60. VLT observations of GRB 130427A
  61. GRB 130427A: Konkoly optical observations
  62. GRB 130515A: IRSF NIR Observation
  63. GRB 130515A: Further Gemini Observations
  64. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  65. Konus-Wind observation of GRB 130515A
  66. GRB 130514B: RATIR Optical and NIR Observations
  67. GRB 130427A: Skynet detections of a possible supernova
  68. GRB 130515A: Swift/UVOT Upper Limits
  69. GRB 130514B: GROND observations
  70. GRB 130515A: Gemini/GMOS Observations
  71. GRB 130515A: GROND Observations
  72. GRB 130515A: Enhanced Swift-XRT position
  73. GRB 130515A: VLT acquisition observation
  74. GRB 130511A: SSO 2.3m observation
  75. GRB 130514B: Swift-XRT Observations
  76. GRB 130515A: Swift detection of a short burst
  77. GRB 130514A: Skynet/PROMPT/DSO Detections
  78. GRB 130513A: Bassano Bresciano optical upper limit
  79. GRB130514B: MASTER-Net optical observations.
  80. GRB 130514A: RATIR Optical and NIR Observations
  81. GRB 130513A: RATIR Optical and NIR Observations
  82. GRB 130513A: Swift/UVOT Upper Limits
  83. GRB 130514A: Swift/UVOT Upper Limits
  84. GRB 130513A: GROND observations
  85. GRB 130514A: Enhanced Swift-XRT position
  86. GRB 130513A: Swift-XRT detection of the afterglow.
  87. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  88. GRB 130514A: P60 Observations
  89. GRB 130514A: Swift detection of a burst
  90. GRB130508A: MASTER-Net optical observations
  91. GRB 130511A: MITSuME Okayama upper limits
  92. GRB 130511A, Swift-BAT refined analysis
  93. GRB 130511A: Upper limit by Xinglong TNT optical observation
  94. GRB 130511A: Enhanced Swift-XRT position
  95. GRB 130511A: Swift detection of a burst with an optical counterpart
  96. GRB 130508A: Swift/UVOT Upper Limits
  97. GRB 130508A: MITSuME Akeno upper limits
  98. GRB 130508A: RATIR Optical and NIR Observations
  99. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  100. GRB 130508A: MITSuME Okayama upper limits

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