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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"

28273 results found.

  1. GRB 080121: Swift/UVOT upper limits
  2. SNe 2008D and 2007uy: Chandra Detections
  3. GRB 080121: Enhanced Swift-XRT position
  4. Transient 080109/SN 2008D: Spectroscopic Evolution and Re-Classification
  5. IPN triangulation of GRB080122
  6. GRB 080121: Nearby SDSS galaxies
  7. GRB 080123: Swift-XRT refined analysis
  8. GRB 080123: Swift/UVOT refined analysis
  9. GRB 080123, Swift-BAT refined analysis
  10. GRB 080123: Enhanced Swift-XRT position
  11. GRB 080123: Swift detection of a short burst
  12. GRB 080120: GROND confirmation of the optical afterglow
  13. VLA radio upper limit on GRB 080120
  14. GRB 080120: Swift-XRT refined analysis
  15. GRB 080120: GROND detection
  16. GRB080120: Swift XRT position
  17. GRB 080120: a long GRB detected by INTEGRAL
  18. Transient in NGC2770 / SN2008D: Metallicity of nearby HII regions
  19. Transient XRF 080109 / SN 2008D: Mount Abu NIR observations
  20. XRF 080109 / SN 2008D: UKIRT JHK imaging
  21. optical observations, XRT in NGC 2770
  22. XRF 080109/SN 2008D: PROMPT Optical Imaging
  23. Gemini-South observations of XRF 080109 / SN 2008D
  24. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  25. Discovery of Radio Emission from Transient in NGC 2770
  26. XRF 080109 in NGC2770: NIR observations at TNG
  27. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  28. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  29. XRF 080109 in NGC2770: Detectable Superluminal Motion
  30. Refined Swift-XRT analysis of the transient in NGC 2770
  31. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  32. GRB 071227: Suzaku WAM observation of the prompt emission
  33. GRB 071227: optical afterglow
  34. Further Swift-BAT analysis of GRB 071227
  35. Konus-Wind observation of GRB 071227
  36. GRB 071227: Swift-XRT refined analysis
  37. GRB 071227: VLT probable redshift of the candidate host galaxy
  38. GRB071227: Swift/UVOT refined analysis
  39. GRB 071227: REM NIR and Optical observations
  40. Swift-BAT refined analysis of short GRB 071227
  41. GRB 071227: Swift detection of a burst
  42. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  43. GRB 071125: Suzaku WAM observation of the prompt emission
  44. GRB 070429B: Probable host galaxy and redshift
  45. GRB 071129, Swift-BAT refined analysis
  46. GRB 071126: Enhanced Swift-XRT position
  47. GRB071122: Swift/UVOT Observations
  48. GRB071104: NIR Afterglow Candidate at TNG
  49. GRB 071122, Swift-BAT refined analysis
  50. GRB 071122 Swift-XRT refined analysis
  51. GRB 071122: P60 Optical Afterglow Candidate
  52. GRB 071122: Swift detection of a burst
  53. GRB 071118: P60 Observations
  54. GRB071118 MITSuME OAO optical observation
  55. GRB 071118: Observations from OSN
  56. GRB 071117: VLT observations and probable redshift
  57. Swift/UVOT observations of GRB071118
  58. Konus-Wind and Konus-A observations of GRB 071117
  59. Swift XRT follow-up observations of GRB071008
  60. Swift/UVOT upper limits for GRB 071117
  61. GRB071118: Swift XRT refined analysis
  62. GRB 071117: Gemini Optical Afterglow Discovery
  63. GRB 071118, Swift-BAT refined analysis
  64. GRB 071117: TAROT La Silla observatory optical observations
  65. GRB 071118: Swift detection of a burst
  66. GRB 071117: Gemini Observations
  67. GRB 071117: Swift-XRT refined analysis
  68. GRB 071117, Swift-BAT refined analysis
  69. Swift detection of MXB 0656-072
  70. GRB 071112C: Optical and NIR data observed with KANATA
  71. GRB 071112C MITSuME Akeno early optical observation
  72. GRB 071112C: SARA upper limit
  73. GRB 071112C : Second Epoch Lulin R-band observations
  74. GRB071112C MITSuME Okayama Optical Observation
  75. GRB 071112C: Swift-BAT refined analysis
  76. GRB 071112C: Swift XRT refined analysis
  77. Swift UVOT upper limits of GRB071112B
  78. GRB 071112B: Gemini Optical Imaging
  79. GRB 071112B: Swift-XRT preliminary analysis
  80. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  81. GRB 071112C : Lulin R-band observation
  82. GRB 071112C: TAROT Calern observatory optical observations
  83. Swift XRT follow-up observations of GRB071028B
  84. GRB071112C Xinglong_TNT_and_EST_afterglow observations
  85. GRB 071112C: Optical and NIR afterglows observed with KANATA
  86. GRB 071112C: Swift detection of a burst with an optical counterpart
  87. GRB 071112B: Swift detection of a short hard burst
  88. GRB 071112: Swift detection of a possible burst
  89. Swift/UVOT initial analysis of GRB071109
  90. GRB 071109: further Swift-XRT analysis
  91. GRB 071109: TAROT Calern observatory optical observations
  92. GRB 071109: Swift-XRT possible X-ray counterpart
  93. GRB 071109: IBIS refined analysis
  94. GRB 071104: Swift-XRT Team Refined Analysis
  95. GRB 071104: Possible Swift UVOT Afterglow Candidate
  96. GRB 071104: Swift-XRT position
  97. GRB 071104: Gamma Ray Burst Localization by SuperAGILE
  98. Swift XRT and UVOT observations of GRB071028B
  99. GRB 071101, Swift-BAT refined analysis
  100. GRB 071101: Swift-XRT Team refined analysis

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