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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"

28108 results found.

  1. GRB 070707: VLT observations
  2. GRB070704: FAVOR optical observations
  3. GRB 070704 : Liverpool Telescope Observations
  4. GRB 070611: VLT observations
  5. VLA detection of GRB 070612A in C Band
  6. GRB 070704: Swift-XRT refined analysis
  7. Swift/UVOT Observations of GRB070704
  8. GRB 070704, Swift-BAT refined analysis
  9. GRB 070704: Correction to GCN Circ 6594
  10. GRB 070704: Swift detection of a burst
  11. GRB 070626: Suzaku/WAM observation of the prompt emission
  12. GRB 070628 Swift-UVOT Refined Analysis
  13. GRB 070628: NIR detection of afterglow
  14. GRB 070628, Swift-BAT refined analysis
  15. GRB 070628: TAROT La Silla observatory optical observations
  16. Swift UVOT Observations of GRB 070628
  17. OT20050728 was not an optical GRB afterglow
  18. GRB 070616 : WIDGET simultaneous optical observations
  19. GRB 070616: Suzaku/WAM observation of the prompt emission
  20. GRB070621: RTT150 optical observations
  21. GRB 070621: VLT optical observations
  22. GRB 070621: Swift/UVOT Upper Limits
  23. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  24. GRB 070621: Swift-BAT refined analysis
  25. GRB070621: Swift XRT refined analysis
  26. GRB 070621: Gemini South optical imaging
  27. GRB 070621: UVOT-enhanced XRT position
  28. Observations of GRB070612A at Calar Alto
  29. GRB 070621: NOT observations
  30. GRB070621: OPTIMA-Burst optical upper limit
  31. GRB 070621: TAROT Calern observatory optical observations
  32. GRB 070621: Watcher Observations
  33. GRB 070621: Swift detection of a burst
  34. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  35. Swift/UVOT detection of GRB070616 optical afterglow.
  36. GRB 070612A: NOT observations
  37. GRB070616: Optical Observation by MITSuME Okayama
  38. GRB 070616, Swift-BAT further refined analysis
  39. GRB 070616: BTA optical observations
  40. GRB 070616: TLS observation
  41. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  42. GRB 070616: Swift detection of a burst
  43. GRB 070612B: optical observations
  44. UVOT Observations of INTEGRAL burst GRB070615
  45. VLA upper limit on GRB 070610
  46. GRB 070615
  47. SWIFT J195509.6+261406 (GRB 070610): further observations
  48. GRB 070612A: Super-LOTIS observations
  49. GRB 070612A: Rapid Decay
  50. GRB 070612A: Suzaku/WAM observation of the prompt emission
  51. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  52. GRB070612A: MITSuME Okayama Observation
  53. GRB 070612A: continued SARA observations
  54. GRB 070611: Watcher Observations
  55. Swift Trigger 282176 is Cygnus X-1
  56. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  57. GRB 070612B: SARA upper limit
  58. GRB 070612B, Swift-BAT refined analysis
  59. GRB 070612A, Swift-BAT refined analysis
  60. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  61. GRB 070612B: Swift/UVOT upper limits
  62. GRB 070612B: FRAM limit
  63. GRB070612B: P60 Observations
  64. GRB 070612A: SARA detection of possible OT
  65. GRB 070610: TAROT Calern observatory optical observations
  66. GRB 070610: MITSuME OAO optical upper limit
  67. GRB070612 - SDSS Pre-Burst Observations
  68. GRB 070612: Swift detection of a burst
  69. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  70. GRB 070610: SARA upper limit
  71. GRB 070610: Swift-XRT refined analysis
  72. GRB 070611: Swift/UVOT Observations
  73. GRB 070611: Swift-XRT refined analysis
  74. GRB 070611, Swift-BAT refined analysis
  75. GRB 070610: Optical observations from OSN
  76. GRB 070610: Watcher Observations
  77. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  78. GRB 070611: ROTSE-III Optical Limits
  79. GRB 070610: Swift-UVOT Upper Limits
  80. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  81. GRB 070610, Swift-BAT refined analysis
  82. GRB 070412: TAROT Calern observatory optical observations
  83. GRB 070411: TAROT Calern observatory optical observations
  84. GRB070520B: optical observations
  85. GRB070520: optical observation
  86. GRB070518: optical observation
  87. GRB070521: optical observation
  88. GRB 070531: NOT nIR observations
  89. GRB 070531: Swift-BAT refined analysis
  90. GRB 070531: I-band observations from IAC80
  91. GRB 070531: Liverpool Telescope Optical Observations
  92. GRB 070529: SARA upper limit
  93. Swift/UVOT refined analysis of GRB070529
  94. GRB 070529: Optical aterglow from MIRO
  95. GRB 070529: Swift-XRT refined analysis
  96. GRB 070529, Swift-BAT refined analysis
  97. GRB 070529: Xinglong TNT Optical Upper Limit
  98. GRB 070529: Swift detection of a burst with an optical aterglow
  99. GRB 070412: Deep Keck imaging
  100. Swift trigger 280447 is probably a Galactic transient

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