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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"

45744 results found.

  1. GRB 130528A: Swift detection of a burst
  2. GRB 130527A: NOT optical counterpart
  3. GRB 130527A: RATIR Optical and NIR Observations
  4. GRB 130527A: Swift-BAT refined analysis
  5. GRB 130527A: Swift-XRT refined Analysis
  6. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  7. GRB 130527A: Enhanced Swift-XRT position
  8. GRB 130527A: Prompt enhanced Swift-XRT position
  9. GRB 130527A: Swift detection of a bright burst
  10. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  11. Swift Trigger 556533 is not an astrophysical event
  12. GRB 130521B: Suzaku WAM observation of the prompt emission
  13. Swift Trigger 556533 is probably not an astrophysical event
  14. Konus-Wind observation of GRB 130521B
  15. GRB 130521A: Skynet/PROMPT observations
  16. IPN Triangulation of GRB 130521B
  17. GRB 130514B: Further Swift-XRT Observations
  18. GRB 130518B, Swift-BAT refined analysis
  19. GRB 130521A, Swift-BAT refined analysis
  20. GRB 130521A: TAROT La Silla observatory optical observations
  21. GRB 130521A: Swift detection of a burst
  22. Swift XRT observation of GRB 130518B
  23. GRB 130518A: mm detection at PdBI
  24. GRB 130515A: Suzaku WAM observation of the prompt emission
  25. GRB 130518A: Gemini Redshift confirmation
  26. GRB 130427A / SN 2013cq: Hubble Space Telescope Observations
  27. GRB 130518A: 10.4m GTC/OSIRIS redshift
  28. GRB 130518A: Continued RATIR Optical Observations - Fading
  29. Correction to GCN Circular 14682 (GRB 130518B)
  30. GRB 130518B found in ground analysis of Swift-BAT data
  31. GRB 130518A: Confirmation of the X-ray afterglow.
  32. GRB 130518A: P60 Afterglow Observations
  33. GRB 130518A: RATIR Optical and NIR Observations
  34. GRB 130518A: Swift XRT and UVOT possible afterglow
  35. Konus-Wind observation of GRB 130518A
  36. GRB 130518A Swift-BAT position from ground analysis
  37. GRB 130518A: Fermi LAT detection
  38. GRB 130518A: Fermi GBM detection
  39. VLT observations of GRB 130427A
  40. GRB 130427A: Konkoly optical observations
  41. GRB 130515A: IRSF NIR Observation
  42. GRB 130515A: Further Gemini Observations
  43. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  44. Konus-Wind observation of GRB 130515A
  45. GRB 130515A: FORS2 spectroscopy of candidate counterpart
  46. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  47. GRB 130514B: RATIR Optical and NIR Observations
  48. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  49. GRB 130515A: Fermi GBM detection
  50. GRB 130427A: Skynet detections of a possible supernova
  51. GRB 130515A: Swift-XRT refined Analysis
  52. GRB 130515A: Swift/UVOT Upper Limits
  53. GRB 130514B Swift-BAT observations
  54. GRB 130515A: Swift-BAT refined analysis
  55. GRB 130514B: GROND observations
  56. GRB 130515A: Gemini/GMOS Observations
  57. GRB 130515A: GROND Observations
  58. GRB 130515A: Enhanced Swift-XRT position
  59. GRB 130515A: VLT acquisition observation
  60. GRB 130511A: SSO 2.3m observation
  61. GRB 130514B: Swift-XRT Observations
  62. GRB 130515A: Swift detection of a short burst
  63. GRB 130514A: Swift-XRT refined Analysis
  64. GRB 130514A: Skynet/PROMPT/DSO Detections
  65. GRB 130513A: Bassano Bresciano optical upper limit
  66. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  67. GRB 130427A: optical observations
  68. GRB130514B: MASTER-Net optical observations.
  69. GRB 130514A: RATIR Optical and NIR Observations
  70. GRB 130513A: RATIR Optical and NIR Observations
  71. GRB 130513A: Swift/UVOT Upper Limits
  72. GRB 130514A: Swift/UVOT Upper Limits
  73. GRB 130513A: GROND observations
  74. GRB 130514B: a long GRB detected by INTEGRAL
  75. GRB 130514A: Enhanced Swift-XRT position
  76. GRB 130514A: Swift-BAT refined analysis
  77. GRB 130513A: Swift-XRT detection of the afterglow.
  78. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  79. GRB 130514A: P60 Observations
  80. GRB 130514A: Swift detection of a burst
  81. GRB 130427A: Tautenburg 2nd epoch: No break, no clear SN
  82. GRB 130513A: a long GRB detected by INTEGRAL
  83. GRB130508A: MASTER-Net optical observations
  84. GRB130511A: SOAO Optical Observation
  85. GRB 130511A: Swift-XRT refined Analysis
  86. GRB 130511A: Kanata/HOWPol optical observation
  87. GRB 130511A: MITSuME Okayama upper limits
  88. GRB 130511A, Swift-BAT refined analysis
  89. GRB 130511A: Upper limit by Xinglong TNT optical observation
  90. GRB 130511A: Enhanced Swift-XRT position
  91. GRB 130511A: Gemini-North Redshift
  92. GRB 130511A: Swift detection of a burst with an optical counterpart
  93. GRB 130508A: Swift/UVOT Upper Limits
  94. GRB 130508A: MITSuME Akeno upper limits
  95. GRB 130427A: host galaxy observations
  96. GRB 130508A: RATIR Optical and NIR Observations
  97. GRB 130427A: Keck/LRIS Observations
  98. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  99. GRB 130508A, Swift-BAT refined analysis
  100. GRB 130508A: MITSuME Okayama upper limits

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