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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"

32717 results found.

  1. GRB 071129, Swift-BAT refined analysis
  2. Konus-Wind and Konus-A observations of GRB 071125
  3. GRB 071112C: Optical/NIR observations
  4. Disregard the "GRB 071126" position
  5. VLA radio detection of GRB 071122
  6. GRB071122: Swift/UVOT Observations
  7. GRB071104: NIR Afterglow Candidate at TNG
  8. GRB 071122: MASTER optical observation
  9. GRB 071122, Swift-BAT refined analysis
  10. GRB 071122 Swift XRT position update sent in error.
  11. GRB 071122 Swift-XRT refined analysis
  12. GRB 071122: Corrected P60 Coordinates
  13. GRB071122: Gemini Absorption redshift
  14. GRB 071122: P60 Optical Afterglow Candidate
  15. GRB 071122: ROTSE-III Optical Limits
  16. GRB 071118: P60 Observations
  17. GRB071118 MITSuME OAO optical observation
  18. GRB 071118: Observations from OSN
  19. GRB 071117: VLT observations and probable redshift
  20. Swift/UVOT observations of GRB071118
  21. GRB 071117: Swift-XRT revised position
  22. Konus-Wind and Konus-A observations of GRB 071117
  23. Swift XRT follow-up observations of GRB071008
  24. Swift/UVOT upper limits for GRB 071117
  25. GRB071118: Swift XRT refined analysis
  26. GRB 071117: Gemini Optical Afterglow Discovery
  27. GRB 071118, Swift-BAT refined analysis
  28. GRB 071112B: Gemini Image Differencing
  29. GRB 071117: Gemini Observations
  30. GRB 071117: Swift-XRT refined analysis
  31. GRB 071117, Swift-BAT refined analysis
  32. VLT FORS2 observations of short hard GRB071112B
  33. GRB 071117: Swift/XRT position
  34. VLA radio upper limit on GRB 071112C
  35. ATCA radio observations of short hard burst GRB 071112B
  36. GRB 071112C: Optical and NIR data observed with KANATA
  37. Correction to the Swift-BAT Transient Identification (trigger=296683)
  38. GRB 071112C: WSRT Radio Observations
  39. GRB071112C: Errata of MITSuME Ic band photometry
  40. GRB 071112C: optical observation
  41. GRB 071112C: optical observation
  42. GRB 071112C: emission lines and refined VLT redshift
  43. GRB 071112C MITSuME Akeno early optical observation
  44. GRB 071112C: Gemini Absorption Redshift
  45. GRB 071112B: 2nd epoch of Magellan i-band imaging
  46. GRB 071112C: SARA upper limit
  47. GRB 071112C : Second Epoch Lulin R-band observations
  48. GRB071112C MITSuME Okayama Optical Observation
  49. GRB 071112C: Swift-BAT refined analysis
  50. GRB 071112C: Swift/UVOT observations
  51. GRB 071112C: Swift XRT refined analysis
  52. GRB 071112C: Optical observations at Crni Vrh
  53. Swift UVOT upper limits of GRB071112B
  54. GRB 071112C: VLT redshift
  55. GRB 071112B: Magellan i-band imaging
  56. GRB 071112B: Gemini Optical Imaging (Correction)
  57. GRB 071112B: Gemini Optical Imaging
  58. GRB 071112B: Swift-XRT preliminary analysis
  59. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  60. GRB071112C: NOT observations
  61. GRB 071112C: Palomar Pre-Imaging
  62. Swift-BAT trigger 296491 is not a GRB
  63. GRB 071112C : Lulin R-band observation
  64. GRB 071112C: RTT150 optical observations
  65. Swift XRT follow-up observations of GRB071028B
  66. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  67. GRB 071112C: Optical and NIR afterglows observed with KANATA
  68. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  69. GRB 071112B: ROTSE-III Rapid Optical Limits
  70. GRB071109: Super-LOTIS observations
  71. VLA IInd observation of INTEGRAL burst GRB 071109
  72. Swift/UVOT initial analysis of GRB071109
  73. GRB 071109: further Swift-XRT analysis
  74. No radio detection at Swift-XRT position
  75. GRB 071109: Swift-XRT possible X-ray counterpart
  76. VLA prompt radio detection of the INTEGRAL burst 071109
  77. GRB 071109: IBIS refined analysis
  78. GRB 071109: BOOTES-2 prompt optical observations
  79. GRB 071104: Swift-XRT Team Refined Analysis
  80. GRB 071104: Possible Swift UVOT Afterglow Candidate
  81. GRB 071104: Swift-XRT position
  82. GRB071010b: optical observation
  83. Swift XRT and UVOT observations of GRB071028B
  84. GRB 071101, Swift-BAT refined analysis
  85. GRB 071101: Swift-XRT Team refined analysis
  86. GRB071101: Optical and NIR upper limits by KANATA
  87. GRB0711101: Two new source from Xinglong TNT observation
  88. GRB 071101: TAROT Calern observatory optical observations
  89. GRB 071101: Swift XRT position
  90. GRB 071101: BOOTES-2 prompt optical observations
  91. GRB 071101: a nearby galaxy
  92. GRB 071031, Swift-BAT refined analysis
  93. GRB 071031: Swift/UVOT detection of afterglow
  94. GRB 071031: Swift-XRT Team refined analysis
  95. GRB 071020: MITSuME Akeno optical observations
  96. GRB 071031: REM NIR and Optical observation
  97. GRB 071031, SMARTS afterglow observations
  98. GRB 071031: VLT high-resolution spectroscopy
  99. GRB071031: Rapid PROMPT Detections
  100. GRB 071028B Swift-BAT detection of a burst

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