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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"

36001 results found.

  1. GRB 070704: RTT150 optical observations
  2. GRB 070704: Suzaku/WAM observation of the prompt emission
  3. Konus-Wind observation of GRB 070707
  4. GRB 070707: optical afterglow
  5. GRB 070707: object inside XRT error circle
  6. Swift XRT observation of GRB 070707
  7. GRB 070707: VLT observations
  8. INTEGRAL GRB 070707 is a short hard burst
  9. INTEGRAL GRB 070707 is a short hard burst
  10. GRB 070707: A long GRB detected by INTEGRAL
  11. GRB 070707: A long GRB detected by INTEGRAL
  12. GRB 070429B: NIR Observations
  13. GRB070704: FAVOR optical observations
  14. GRB 070704 : Liverpool Telescope Observations
  15. GRB 070611: VLT observations
  16. VLA detection of GRB 070612A in C Band
  17. Konus-Wind observation of GRB 070626
  18. GRB 070704: Swift-XRT refined analysis
  19. Swift/UVOT Observations of GRB070704
  20. GRB 070704, Swift-BAT refined analysis
  21. GRB 070704: Correction to GCN Circ 6594
  22. GRB 070704: Swift detection of a burst
  23. GRB 070626: Suzaku/WAM observation of the prompt emission
  24. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  25. GRB 070628 Swift-UVOT Refined Analysis
  26. GRB 070628: NIR detection of afterglow
  27. GRB 070628, Swift-BAT refined analysis
  28. GRB 070628: TAROT La Silla observatory optical observations
  29. GRB 070628: Swift XRT refined analysis
  30. GRB 070628: Watcher Observations
  31. Swift UVOT Observations of GRB 070628
  32. GRB 070628: Swift detection of a possible burst
  33. GRB 070612A: Allen Telescope Array Observations
  34. IBAS Alert n. 4638: Not a GRB
  35. OT20050728 was not an optical GRB afterglow
  36. GRB 070616 : WIDGET simultaneous optical observations
  37. GRB 070616: Suzaku/WAM observation of the prompt emission
  38. IBAS Alert n.4637: not a GRB
  39. GRB 070612A: Second Epoch WSRT Radio Observations
  40. GRB070621: RTT150 optical observations
  41. GRB 070621: VLT optical observations
  42. GRB 070621: Swift/UVOT Upper Limits
  43. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  44. GRB 070621: Swift-BAT refined analysis
  45. GRB 070621: Gemini South optical imaging
  46. GRB 070621: UVOT-enhanced XRT position
  47. Observations of GRB070612A at Calar Alto
  48. GRB 070621: NOT observations
  49. GRB070621: OPTIMA-Burst optical upper limit
  50. GRB 070621: TAROT Calern observatory optical observations
  51. GRB 070621: Watcher Observations
  52. GRB 070621: ROTSE-III Prompt Optical Limits
  53. GRB 070621: Swift detection of a burst
  54. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  55. GRB 070612A: TNG optical observations
  56. Swift/UVOT detection of GRB070616 optical afterglow.
  57. GRB070612A: Gemini Spectroscopic Redshift
  58. GRB 070612A: NOT observations
  59. GRB 070612B: Optical Observation by MITSuME Akeno
  60. GRB070616: Optical Observation by MITSuME Okayama
  61. GRB 070616, Swift-BAT further refined analysis
  62. GRB 070616: Swift XRT refined circular
  63. GRB 070612A: Possible WSRT Radio Detection
  64. GRB 070616: BTA astrometry and finding chart
  65. GRB 070616: BTA optical observations
  66. GRB 070616: TLS observation
  67. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  68. GRB 070616, Swift-BAT partial refined analysis
  69. GRB 070616: Swift detection of a burst
  70. GRB 070612B: optical observations
  71. VLA upper limit on GRB 070610
  72. GRB 070615
  73. GRB 070615: A long GRB detected by INTEGRAL
  74. SWIFT J195509.6+261406 (GRB 070610): further observations
  75. GRB 070612A: Super-LOTIS observations
  76. GRB 070612A: Rapid Decay
  77. GRB 070612A: Suzaku/WAM observation of the prompt emission
  78. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  79. GRB070612A: MITSuME Okayama Observation
  80. GRB 070612A: continued SARA observations
  81. GRB 070612A: spectral lag
  82. GRB 070611: Watcher Observations
  83. Swift Trigger 282176 is Cygnus X-1
  84. GRB 070612A: MDM Observations
  85. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  86. GRB 070612B: SARA upper limit
  87. GRB 070612B, Swift-BAT refined analysis
  88. GRB 070612A, Swift-BAT refined analysis
  89. GRB 070612B: Swift-XRT refined analysis
  90. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  91. GRB 070612B: Swift/UVOT upper limits
  92. GRB 070612B: FRAM limit
  93. GRB 070612B: KAIT limits
  94. GRB 070612A: SARA detection of possible OT
  95. GRB 070612B: Swift XRT position from downlink data
  96. GRB 070610: TAROT Calern observatory optical observations
  97. GRB 070610: MITSuME OAO optical upper limit
  98. GRB 070612B: Swift detection of a burst
  99. GRB070612 - SDSS Pre-Burst Observations
  100. GRB 070612: Swift detection of a burst

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