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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"

38647 results found.

  1. GRB 080325: Swift detection of a burst
  2. IBAS Alert n. 5245: NOT a GRB
  3. GRB 080319B: Spitzer Mid-infrared Observations
  4. GRB 080319C: Suzaku WAM observation of the prompt emission
  5. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  6. Radio Detection of GRB 080319B
  7. GRB 080319D: GROND Observations
  8. GRB 080319B: TORTORA light curve
  9. GRB 080319B: optical upper limit
  10. GRB 080319D: optical upper limit
  11. GRB 080319C: UVOT Observations
  12. GRB 080319B: UVOT Observations
  13. GRB 080319A: UVOT Observations
  14. GRB 080320: Swift XRT refined analysis
  15. GRB 080319B - CARMA mm Observations
  16. GRB 080320: Early Super-LOTIS Observations
  17. GRB 080319D: Swift XRT refined analysis
  18. GRB 080320: optical limit
  19. GRB 080320: Gemini-N optical afterglow
  20. Konus-Wind observation of GRB 080319C
  21. GRB 080319B: Gemini-South photometry
  22. GRB 080319B: Allen Telescope Array Observations
  23. GRB 080319B optical observations
  24. GRB 080319C, Swift-BAT refined analysis
  25. Konus-Wind observation of GRB 080319B
  26. GRB 080319B: WSRT Radio Observations
  27. GRB 080320: Enhanced Swift-XRT position
  28. GRB 080320: optical limit from IAC80
  29. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  30. GRB 080319C: KAIT OA observations
  31. GRB 080320 - SDSS Pre-Burst Observations
  32. GRB 080320: Swift detection of a burst
  33. GRB 080320: ROTSE-III Optical Limits
  34. GRB 080319B : Lulin observation of temporal break at 0.2 days
  35. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  36. GRB 080319B: optical observations
  37. GRB 080319C - SDSS Pre-Burst Observations
  38. GRB 080319A SDSS Pre-Burst Observations
  39. Swift-BAT trigger 306829 is IGR J16479-4514
  40. GRB080319B - SDSS Pre-Burst Observations
  41. GRB 080319A: Swift-XRT Team Refined Analysis
  42. GRB 080319B, Swift-BAT refined analysis
  43. GRB 080319C: Swift-XRT Team Refined Analysis
  44. GRB 080319B: Swift-XRT Team Refined Analysis
  45. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  46. GRB 080319C: AGILE-MCAL observation of the prompt emission
  47. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  48. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  49. GRB 080319B: TORTORA synchronous observation
  50. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  51. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  52. GRB 080319B: Enhanced Swift-XRT position
  53. GRB 080319A: Enhanced Swift-XRT position
  54. GRB 080319A, Swift-BAT refined analysis
  55. GRB 080319B: REM early data
  56. GRB 080319b light curve by Pi-of-the-Sky
  57. VLT/UVES redshift of GRB 080319B
  58. GRB 080319C: Early Super-LOTIS Observations
  59. GRB 080319C: Swift detection of a burst with an optical afterglow
  60. GRB 080319C: KAIT OA candidate
  61. GRB 080319A: REM observations
  62. GRB 080319b prompt optical observation by Pi-of-the-Sky
  63. GRB 080319B: Change in power law decay index
  64. GRB 080319B: Gemini-South Spectroscopy
  65. GRB 080319A: optical observations at the NOT
  66. GRB0 080319B : LOAO optical observation
  67. GRB 080319b: Early IR Imaging from PAIRITEL
  68. GRB 080319B: Super-LOTIS Detection of a Bright OT
  69. GRB 080319B: REM observations
  70. GRB 080319B: KAIT OA
  71. GRB080319A: P60 Optical Afterglow Observations
  72. GRB 080319B: UVOT Position
  73. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  74. GRB 080319A: Swift detection of a burst
  75. Swift Trigger 306745 is not a GRB
  76. Swift Trigger 306616 is not a GRB
  77. GRB080310, LBT and MDM photometry
  78. GRB080315: Bok Optical Observations
  79. Swift/UVOT observations of GRB 080315
  80. SAX J1818.6-1703: Swift detection (trigger 306379)
  81. GRB 080315: Optical observations
  82. GRB 080315: Swift detection of a possible burst
  83. GRB080310 : Lulin Optical observations
  84. GRB080310, unusual slow decay in the optical
  85. GRB080310 : Optical observations by LOAO and Lulin
  86. GRB 080310: ROTSE-III Observations of Optical Counterpart
  87. GRB080310: Optical observation by MITSuME telescope
  88. GRB080310, optical observations with the LBT
  89. GRB 080307: NIR upper limit
  90. GRB 080229: NIR upper limit
  91. GRB 080310, Swift-BAT refined analysis
  92. GRB080210: optical observations
  93. GRB080307: optical upper limit
  94. GRB 080310: Swift-XRT refined analysis
  95. GRB 080310: Swift/UVOT Refined Analysis
  96. GRB 080310: Redshift from Keck/DEIMOS Spectra
  97. GRB 080310 - SDSS Pre-Burst Observations
  98. GRB080310 : Lulin optical observation
  99. GRB 080310: Enhanced Swift-XRT position
  100. GRB 080310: RRM optical photometry with the VLT

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