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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"

15366 results found.

  1. GRB 071018: SARA observations
  2. GRB 071017 - Swift XRT observations
  3. GRB 071010B: Light Curve Break Confirmed
  4. GRB 071018, Swift-BAT refined analysis
  5. GRB 071010B: Suzaku WAM observation of the prompt emission
  6. GRB 071013: TNT optical data refined analysis
  7. GRB 071010B: Keck/DEIMOS emission-line redshift
  8. GRB 071010B: Optical observations of EST
  9. GRB 071011: MITSuME Optical Observations
  10. GRB 071010B: Photometry after 1.6 days
  11. GRB 071010B: Keck/LRIS Photometry
  12. GRB071010B, BVRcIc field calibration
  13. GRB 071011: Optical Limit after 13.95hrs
  14. GRB 071011: Xinglong TNT Optical afterglow observations
  15. GRB 071010B correction to GCN 6892 optical observations
  16. GRB 071011: Swift-XRT refined analysis
  17. GRB 071011: NAYUTA Optical Observation, correction to GCN6886
  18. GRB 071011, Optical afterglow
  19. GRB 071011: Confirmation of P60 optical afterglow
  20. GRB 071010B: Optical Detection
  21. GRB 071011: Kanazawa Optical limits
  22. GRB 071011: P60 Optical Afterglow Candidate
  23. GRB 071010B optical photometry
  24. GRB 071011: XRT afterglow detection
  25. GRB 071010B: Gemini Spectroscopic Observations
  26. GRB 071011: Early Super-LOTIS Observations
  27. GRB 071011: NAYUTA Optical Observation
  28. GRB 071010B: Bright OT confirmed with TLS
  29. Optical Observation: GRB 071010
  30. Optical observations: GRB 071010A
  31. Konus-Wind observation of GRB 071010B
  32. GRB071010B: Swift/XRT detection
  33. GRB 071010A: bright NIR afterglow
  34. GRB 071010B possible optical transient
  35. GRB 071010A: Keck/LRIS Photometry
  36. Konus-Wind observation of GRB 071006
  37. GRB 071010 REM NIR observations
  38. Konus-Wind observation of GRB 071003
  39. GRB 071003: Possible rebrightening
  40. GRB 071003: Swift XRT position
  41. GRB 071003: OA power-law decay indices from KAIT
  42. GRB 071003: Keck HIRES spectroscopy
  43. GRB 071003 Optical observations
  44. GRB 071003: P60 Confirmation of Optical Afterglow
  45. GRB 070714B: host galaxy spectroscopic redshift
  46. GRB 070925: a long GRB detected by INTEGRAL
  47. GRB 070917: Suzaku/WAM observation of the prompt emission
  48. GRB 070920B: TAROT La Silla observatory optical observations
  49. INTEGRAL ToO observations of SGR1806-20
  50. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  51. GRB 070920B: NOT optical observations
  52. SGR1806-20: Swift-BAT detection of enhanced activity
  53. GRB070917: Confirmation of optical afterglow
  54. Konus-Wind observation of GRB 070917
  55. GRB 070911: Suzaku WAM observation of the prompt emission
  56. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  57. GRB 070809: Confirmation of optical transient
  58. Observations of possible TAROT GRB transient near IC 4779
  59. GRB 070810b: Image Subtraction of Multiple Keck Observations
  60. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  61. Konus-Wind observation of GRB 070824
  62. Konus-Wind observation of very bright GRB 070821
  63. GRB 070810A: ROTSE-III Refined Analysis
  64. GRB 061110A: redshift confirmed
  65. GRB 070810B : Faulkes Telescope South Observations
  66. GRB 070810A: Continued Keck Imaging
  67. GRB 070810B: Keck spectroscopy of possible host galaxies
  68. GRB 070809: Swift/UVOT Corrected Photometry
  69. A giant outburst from Cygnus X-1 detected by Konus-Wind and Suzaku-WAM
  70. GRB 070809: Keck Imaging
  71. GRB 070809: Swift-XRT refined analysis
  72. GRB 070810: Swift/UVOT Optical Counterpart
  73. GRB070808 - SDSS Pre-Burst Observations
  74. GRB 070721B: correct afterglow position
  75. Swift detection of a outburst from SAX J1810.8-2609
  76. GRB 070802: REM optical observations
  77. GRB 070802: Confirmation of the optical afterglow
  78. GRB 070802: V-band detection of the candidate afterglow
  79. Konus-A observation of GRB 070729
  80. Swift/UVOT detection of GRB070714B
  81. GRB 070721A: optical observations
  82. GRB 070724A: further VLT observations
  83. GRB 070724B: Suzaku WAM observation of the prompt emission
  84. Konus-Wind observation of GRB 070724B
  85. GRB 070724B: Analysis of AGILE gamma-ray data
  86. GRB 070724b: First Gamma Ray Burst Localization by SuperAGILE onboard
  87. GRB 070724: optical observations
  88. GRB 060814 - Keck host detection and redshift
  89. GRB 070721B: further observations and analysis
  90. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  91. GRB 070714B: Keck observations
  92. GRB 070721B, Further Swift-BAT refined analysis
  93. GRB 070721B : Faulkes Telescope South observations
  94. GRB 070721B: Swift-XRT refined analysis
  95. GRB 070721A: Swift/XRT refined analysis
  96. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  97. GRB 070714B : Suzaku WAM observation of the prompt emission
  98. GRB070714B: TNG NIR observations
  99. GRB 070707: Swift-XRT follow-up observations
  100. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)

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