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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"

28105 results found.

  1. GRB 070714 : Liverpool Telescope optical counterpart ?
  2. GRB 070714: Swift detection of a bright burst, possibly short
  3. Swift detection of a possible burst (Trigger 284850)
  4. GRB 070704: RTT150 optical observations
  5. GRB 070707: optical afterglow
  6. GRB 070707: object inside XRT error circle
  7. Swift/UVOT Observations of GRB070707
  8. Swift XRT observation of GRB 070707
  9. GRB 070707: VLT observations
  10. GRB 070429B: NIR Observations
  11. GRB070704: FAVOR optical observations
  12. GRB 070704 : Liverpool Telescope Observations
  13. GRB 070611: VLT observations
  14. VLA detection of GRB 070612A in C Band
  15. GRB 070704: Swift-XRT refined analysis
  16. Swift/UVOT Observations of GRB070704
  17. GRB 070704: Correction to GCN Circ 6594
  18. GRB 070704: Swift detection of a burst
  19. GRB 070628 Swift-UVOT Refined Analysis
  20. GRB 070628: NIR detection of afterglow
  21. GRB 070628: Swift XRT refined analysis
  22. Swift UVOT Observations of GRB 070628
  23. GRB 070628: Swift detection of a possible burst
  24. GRB 070612A: Allen Telescope Array Observations
  25. OT20050728 was not an optical GRB afterglow
  26. INTEGRAL burst GRB070615: X-ray continued observations
  27. GRB 070616 : WIDGET simultaneous optical observations
  28. GRB 070612A: Second Epoch WSRT Radio Observations
  29. GRB070621: RTT150 optical observations
  30. GRB 070621: VLT optical observations
  31. GRB 070621: Swift/UVOT Upper Limits
  32. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  33. WHT observations of GRB070621
  34. GRB070621: Swift XRT refined analysis
  35. GRB 070621: Gemini South optical imaging
  36. GRB 070621: UVOT-enhanced XRT position
  37. Observations of GRB070612A at Calar Alto
  38. GRB 070621: NOT observations
  39. GRB070621: OPTIMA-Burst optical upper limit
  40. GRB 070621: TAROT Calern observatory optical observations
  41. GRB 070621: Watcher Observations
  42. GRB 070621: ROTSE-III Prompt Optical Limits
  43. GRB 070621: Swift detection of a burst
  44. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  45. GRB 070612A: TNG optical observations
  46. Swift/UVOT detection of GRB070616 optical afterglow.
  47. GRB070612A: Gemini Spectroscopic Redshift
  48. GRB 070612A: NOT observations
  49. GRB070616: Optical Observation by MITSuME Akeno
  50. GRB 070612B: Optical Observation by MITSuME Akeno
  51. GRB070616: Optical Observation by MITSuME Okayama
  52. GRB 070616, Swift-BAT further refined analysis
  53. GRB 070616: Swift XRT refined circular
  54. GRB 070612A: Possible WSRT Radio Detection
  55. GRB 070616: BTA astrometry and finding chart
  56. GRB 070616: BTA optical observations
  57. Swift/UVOT observations of GRB070616
  58. GRB 070616: TLS observation
  59. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  60. GRB 070616: Swift detection of a burst
  61. GRB 070612B: optical observations
  62. UVOT Observations of INTEGRAL burst GRB070615
  63. VLA upper limit on GRB 070610
  64. GRB 070612A: Super-LOTIS observations
  65. GRB 070612A: Rapid Decay
  66. GRB070612A: MITSuME Okayama Observation
  67. GRB 070612A: continued SARA observations
  68. GRB 070611: Watcher Observations
  69. GRB 070612A: MDM Observations
  70. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  71. GRB 070612B: SARA upper limit
  72. GRB 070612B: Swift-XRT refined analysis
  73. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  74. GRB 070612B: Swift/UVOT upper limits
  75. GRB 070612B: FRAM limit
  76. GRB070612B: P60 Observations
  77. GRB 070612B: KAIT limits
  78. GRB 070612A: SARA detection of possible OT
  79. GRB 070612B: Swift XRT position from downlink data
  80. GRB 070610: TAROT Calern observatory optical observations
  81. GRB 070610: MITSuME OAO optical upper limit
  82. GRB 070612B: Swift detection of a burst
  83. GRB 070612: Swift detection of a burst
  84. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  85. GRB 070610: Swift-XRT refined analysis
  86. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  87. GRB 070611: Swift/UVOT Observations
  88. GRB 070611: Swift-XRT refined analysis
  89. GRB 070610: Optical observations from OSN
  90. GRB 070610: Watcher Observations
  91. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  92. GRB 070611; Swift-XRT position
  93. GRB 070611: Swift detection of a burst
  94. GRB 070610: Swift-UVOT Upper Limits
  95. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  96. GRB 070610; Swift-XRT position
  97. GRB 070610: Swift detection of a burst
  98. GRB 070412: TAROT Calern observatory optical observations
  99. GRB 070419A, deep LBT photometry and possible supernova detection
  100. GRB070520B: optical observations

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