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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"

19304 results found.

  1. GRB 070224, Swift-BAT refined analysis
  2. GRB 070223, Swift-BAT refined analysis
  3. GRB070223: MASTER-VWF-Kislovodsk observations
  4. GRB 070223: Swift-XRT Refined Analysis
  5. GRB070223 - SDSS Pre-Burst Observations
  6. GRB 070223: MDM Observations
  7. GRB 070220: MITSuME Okayama Optical Observation
  8. GRB 070220 Swift-BAT Refined Analysis
  9. GRB 070209: Swift XRT refined analysis
  10. GRB 070220: Swift-XRT Refined Analysis
  11. GRB 070220: Observation with the KANATA 1.5m telescope
  12. GRB 070219, Swift-BAT refined analysis
  13. GRB 070219: Swift detection of a burst
  14. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  15. GRB 070125: Break in Optical Decay
  16. GRB 070209: Swift XRT analysis
  17. GRB 070201: clarification on localization and Konus-Wind spectra
  18. IPN localization of very bright long hard GRB 070207
  19. GRB 070209, Swift-BAT refined analysis of the short hard burst
  20. GRB 070208: Swift XRT refined analysis
  21. GRB 070208, Swift-BAT refined analysis
  22. GRB070208 - SDSS Pre-Burst Observations
  23. GRB 070208: Early IR detection and afterglow astrometry
  24. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  25. GRB 070125: optical observation
  26. GRB 070129, Swift-BAT refined analysis of a particularly long
  27. GRB 070129: Swift-XRT Refined Analysis
  28. GRB 070125: MITSuME Okayama optical observation
  29. GRB 070126: VLT observations
  30. GRB 070124: Suzaku WAM observation of the prompt emissions
  31. GRB 070125: UVOT Detection in Ultraviolet Filters
  32. GRB 070126, Swift-BAT refined analysis of a very faint burst
  33. GRB070124: Swift-XRT Observation
  34. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  35. GRB 070125: Lick 3m Spectroscopy
  36. GRB070125: Swift-XRT Refined Analysis
  37. IPN localization of GRB070124 (short duration, hard spectrum)
  38. GRB 070110: Continued Detection and Request for Ground Followup
  39. GRB 070110: Ep,i - Eiso correlation
  40. GRB 070107: Suzaku WAM observation of the prompt emission
  41. GRB 070110: UVOT Observations of a Candidate Afterglow
  42. GRB070110: Swift XRT Team refined analysis
  43. GRB 070110, Swift-BAT refined analysis
  44. GRB 070110: Swift detection of a burst with a possible optical afterglow
  45. GRB 070107: Possible UVOT Afterglow
  46. GRB 070107, Swift-BAT refined analysis
  47. GRB070103: KPNO 4m+FLAMINGOS J limit
  48. GRB070103: Swift XRT refined analysis
  49. GRB 070103, Swift-BAT refined analysis
  50. Retractions of previous Swift-BAT triggers
  51. GRB 050826: MDM Redshift
  52. GRB 061222B, Swift-BAT refined analysis
  53. GRB 061222A: Observation with the KANATA 1.5m telescope
  54. GRB 061217: Magellan host galaxy redshift
  55. GRB 061222A, Swift-BAT refined analysis
  56. GRB 061222b: optical afterglow
  57. GRB 061218, Swift-BAT refined analysis
  58. Swift triggers (#251863) on a possible burst
  59. GRB 061217: optical observations at Calar Alto
  60. GRB061217 - Swift/XRT refined analysis
  61. GRB 061217, Further Swift-BAT refined analysis of the short hard burst
  62. GRB 061217, Swift-BAT refined analysis
  63. GRB061210: Swift/UVOT observations
  64. GRB 061202: Suzaku WAM observation of the prompt emission
  65. GRB 061210, Swift-BAT refined analysis of the SHB
  66. GRB 060926: MASTER: discovery of the optical flare
  67. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  68. GRB 061202: TORTOREM optical upper limits
  69. GRB061202 optical limit by "Pi of the Sky"
  70. GRB 061202, Swift-BAT refined analysis
  71. GRB 061201: Initial UVOT Observations
  72. GRB 061201, Swift-BAT refined analysis of the SHB
  73. GRB 061201: Swift detection of a short hard burst
  74. GRB 061121: Second Epoch ATCA Radio Observations
  75. Swift XRT on-board boresight update
  76. GRB 061126: optical observation
  77. GRB 061126: Tautenburg afterglow observations
  78. GRB 061126: Swift-XRT refined analysis
  79. GRB 061126, Swift-BAT refined analysis
  80. GRB 061126: Swift/UVOT Afterglow Detection
  81. GRB 061122: Confirmation of X-ray/Optical Afterglow
  82. GRB 061122: Candidate Optical Afterglow
  83. GRB 061121: Ep,i - Eiso correlation
  84. GRB061122: Swift/UVOT Optical Observations
  85. Konus-Wind observation of GRB 061122
  86. INTEGRAL results on GRB 061122
  87. GRB 061121: Swift-XRT Team Refined Analysis
  88. GRB 061121, Swift-BAT refined analysis
  89. GRB 061121: ROTSE-III Confirmation of Optical Counterpart
  90. GRB 061121: Swift detection of a bright burst with an optical counterpart
  91. GRB 050915B: optical afterglow
  92. Swift-BAT triggers 238544 and 238546 are not GRBs
  93. GRB 061110B, Swift-BAT refined analysis
  94. GRB 061110A: Swift XRT refined analysis
  95. GRB 061110A, Swift-BAT refined analysis
  96. GRB 061110 : Optical afterglow candidate
  97. GRB 061109: optical observation
  98. GRB 061027: TAROT La Silla observatory optical observations
  99. GRB 061028: Swift/XRT Astrometry Correction
  100. GRB 061102, XRT refined analysis

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