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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

15985 results found.

  1. GRB 070809: Optical Pre-imaging from Palomar
  2. GRB 070809: ROTSE-III Optical Limits
  3. GRB 070809: Swift detection of a short burst
  4. GRB 070808: OPTIMA-Burst optical upper limit
  5. GRB 070808: Xinglong TNT optical Upper Limit
  6. GRB070808: Optical observations with KANATA
  7. GRB 070808: ROTSE-III Optical Limits
  8. GRB070612A: Radio upper limit from GMRT
  9. GRB 070802: REM optical observations
  10. GRB 070802: Swift-XRT refined analysis
  11. GRB 070802: Confirmation of the optical afterglow
  12. GRB 070802: LCO optical observations
  13. GRB 070729: LCO optical imaging
  14. GRB 070721A: optical observations
  15. GRB 070724: optical observations
  16. GRB 070721B: further observations and analysis
  17. GRB 070721B: optical observations and proposed redshift
  18. Swift/UVOT observations of GRB070721B optical afterglow.
  19. GRB 070721B : Faulkes Telescope South observations
  20. GRB 070721A : Faulkes Telescope South optical limit
  21. GRB 070714B: confirmation of optical afterglow
  22. GRB070714B: Swift-XRT refined analysis
  23. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  24. GRB 070714 ("Bastille"): Optical Pre-Imaging
  25. GRB 070714 : Liverpool Telescope optical counterpart ?
  26. GRB 070704: RTT150 optical observations
  27. GRB 070707: optical afterglow
  28. GRB070704: FAVOR optical observations
  29. GRB 070611: VLT observations
  30. VLA detection of GRB 070612A in C Band
  31. GRB 070628: NIR detection of afterglow
  32. GRB 070628: TAROT La Silla observatory optical observations
  33. GRB 070612A: Allen Telescope Array Observations
  34. OT20050728 was not an optical GRB afterglow
  35. GRB 070616 : WIDGET simultaneous optical observations
  36. GRB 070612A: Second Epoch WSRT Radio Observations
  37. GRB070621: RTT150 optical observations
  38. GRB 070621: VLT optical observations
  39. GRB 070621: Gemini South optical imaging
  40. GRB070621: OPTIMA-Burst optical upper limit
  41. GRB 070621: TAROT Calern observatory optical observations
  42. GRB 070621: ROTSE-III Prompt Optical Limits
  43. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  44. GRB 070612A: TNG optical observations
  45. Swift/UVOT detection of GRB070616 optical afterglow.
  46. GRB070616: Optical Observation by MITSuME Akeno
  47. GRB 070612B: Optical Observation by MITSuME Akeno
  48. GRB070616: Optical Observation by MITSuME Okayama
  49. GRB 070616: Swift XRT refined circular
  50. GRB 070612A: Possible WSRT Radio Detection
  51. GRB 070616: BTA astrometry and finding chart
  52. GRB 070616: BTA optical observations
  53. Swift/UVOT observations of GRB070616
  54. GRB 070612B: optical observations
  55. VLA upper limit on GRB 070610
  56. GRB 070612A: Rapid Decay
  57. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  58. GRB070612A: MITSuME Okayama Observation
  59. GRB 070612A: MDM Observations
  60. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  61. GRB 070610: TAROT Calern observatory optical observations
  62. GRB 070610: MITSuME OAO optical upper limit
  63. GRB 070610: SARA upper limit
  64. GRB 070610: Swift-XRT refined analysis
  65. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  66. GRB 070611: Swift-XRT refined analysis
  67. GRB 070610: Optical observations from OSN
  68. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  69. GRB 070611: ROTSE-III Optical Limits
  70. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  71. GRB 070412: TAROT Calern observatory optical observations
  72. GRB 070411: TAROT Calern observatory optical observations
  73. GRB070520B: optical observations
  74. GRB070520: optical observation
  75. GRB070518: optical observation
  76. GRB070521: optical observation
  77. Swift/UVOT refined analysis of GRB070531
  78. GRB 070531: Liverpool Telescope Optical Observations
  79. Swift/UVOT refined analysis of GRB070529
  80. GRB 070529: Optical aterglow from MIRO
  81. GRB 070529: Xinglong TNT Optical Upper Limit
  82. GRB 070529: Swift detection of a burst with an optical aterglow
  83. GRB 070518: MARGE Observations
  84. GRB 070518: optical observation
  85. GRB070521: NIR observations
  86. GRB070520B: NIR observations
  87. GRB 070521, optical observation
  88. GRB070518: Optical/NIR observation
  89. GRB 070521: optical limit by Pi of the Sky
  90. GRB 070521: TAROT La Silla observatory optical observations
  91. GRB 070520A: MITSuME Akeno optical upper limits
  92. GRB 070518: TNG observations
  93. GRB 070520: Xinglong EST optical Upper Limit
  94. GRB 070517: Gemini optical imaging
  95. GRB070518: OSN observation
  96. GRB 070518: Swift detection of a burst with optical afterglow
  97. GRB 070517: Optical search
  98. GRB070419A: optical observations
  99. GRB 070508: OA fading and tentative redshift
  100. GRB 070509: REM observations

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