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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"

36187 results found.

  1. GRB 070611: VLT observations
  2. VLA detection of GRB 070612A in C Band
  3. Konus-Wind observation of GRB 070626
  4. GRB 070704: Swift-XRT refined analysis
  5. Swift/UVOT Observations of GRB070704
  6. GRB 070704, Swift-BAT refined analysis
  7. GRB 070704: Correction to GCN Circ 6594
  8. GRB 070704: Swift detection of a burst
  9. GRB 070626: Suzaku/WAM observation of the prompt emission
  10. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  11. GRB 070628 Swift-UVOT Refined Analysis
  12. GRB 070628: NIR detection of afterglow
  13. GRB 070628, Swift-BAT refined analysis
  14. GRB 070628: TAROT La Silla observatory optical observations
  15. GRB 070628: Swift XRT refined analysis
  16. GRB 070628: Watcher Observations
  17. Swift UVOT Observations of GRB 070628
  18. GRB 070628: Swift detection of a possible burst
  19. GRB 070612A: Allen Telescope Array Observations
  20. IBAS Alert n. 4638: Not a GRB
  21. OT20050728 was not an optical GRB afterglow
  22. GRB 070616 : WIDGET simultaneous optical observations
  23. GRB 070616: Suzaku/WAM observation of the prompt emission
  24. IBAS Alert n.4637: not a GRB
  25. GRB 070612A: Second Epoch WSRT Radio Observations
  26. GRB070621: RTT150 optical observations
  27. GRB 070621: VLT optical observations
  28. GRB 070621: Swift/UVOT Upper Limits
  29. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  30. GRB 070621: Swift-BAT refined analysis
  31. GRB 070621: Gemini South optical imaging
  32. GRB 070621: UVOT-enhanced XRT position
  33. Observations of GRB070612A at Calar Alto
  34. GRB 070621: NOT observations
  35. GRB070621: OPTIMA-Burst optical upper limit
  36. GRB 070621: TAROT Calern observatory optical observations
  37. GRB 070621: Watcher Observations
  38. GRB 070621: ROTSE-III Prompt Optical Limits
  39. GRB 070621: Swift detection of a burst
  40. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  41. GRB 070612A: TNG optical observations
  42. Swift/UVOT detection of GRB070616 optical afterglow.
  43. GRB070612A: Gemini Spectroscopic Redshift
  44. GRB 070612A: NOT observations
  45. GRB 070612B: Optical Observation by MITSuME Akeno
  46. GRB070616: Optical Observation by MITSuME Okayama
  47. GRB 070616, Swift-BAT further refined analysis
  48. GRB 070616: Swift XRT refined circular
  49. GRB 070612A: Possible WSRT Radio Detection
  50. GRB 070616: BTA astrometry and finding chart
  51. GRB 070616: BTA optical observations
  52. GRB 070616: TLS observation
  53. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  54. GRB 070616, Swift-BAT partial refined analysis
  55. GRB 070616: Swift detection of a burst
  56. GRB 070612B: optical observations
  57. VLA upper limit on GRB 070610
  58. GRB 070615
  59. GRB 070615: A long GRB detected by INTEGRAL
  60. SWIFT J195509.6+261406 (GRB 070610): further observations
  61. GRB 070612A: Super-LOTIS observations
  62. GRB 070612A: Rapid Decay
  63. GRB 070612A: Suzaku/WAM observation of the prompt emission
  64. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  65. GRB070612A: MITSuME Okayama Observation
  66. GRB 070612A: continued SARA observations
  67. GRB 070612A: spectral lag
  68. GRB 070611: Watcher Observations
  69. Swift Trigger 282176 is Cygnus X-1
  70. GRB 070612A: MDM Observations
  71. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  72. GRB 070612B: SARA upper limit
  73. GRB 070612B, Swift-BAT refined analysis
  74. GRB 070612A, Swift-BAT refined analysis
  75. GRB 070612B: Swift-XRT refined analysis
  76. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  77. GRB 070612B: Swift/UVOT upper limits
  78. GRB 070612B: FRAM limit
  79. GRB 070612B: KAIT limits
  80. GRB 070612A: SARA detection of possible OT
  81. GRB 070612B: Swift XRT position from downlink data
  82. GRB 070610: TAROT Calern observatory optical observations
  83. GRB 070610: MITSuME OAO optical upper limit
  84. GRB 070612B: Swift detection of a burst
  85. GRB070612 - SDSS Pre-Burst Observations
  86. GRB 070612: Swift detection of a burst
  87. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  88. GRB 070610: SARA upper limit
  89. GRB 070610: Swift-XRT refined analysis
  90. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  91. GRB 070611: Swift/UVOT Observations
  92. GRB 070611: Swift-XRT refined analysis
  93. GRB 070611, Swift-BAT refined analysis
  94. GRB 070610: Optical observations from OSN
  95. GRB 070610: Watcher Observations
  96. GRB 070611: VLT redshift
  97. GRB 060121 : pseudo-z = 1.9 ('intermediate-duration' burst)
  98. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  99. GRB 070611; Swift-XRT position
  100. GRB 070611: ROTSE-III Optical Limits

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