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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"

15389 results found.

  1. GRB 080319B: Potential Jet Break Observed by Swift-XRT and UVOT
  2. GRB 080325: optical upper limit
  3. GRB 080328: GAO 150cm telescope Optical Observation
  4. GRB 080319B: TORTORA light curve (Correction)
  5. GRB080328, RIMOTS optical upper limit
  6. GRB 080330: REM optical observations
  7. GRB 080330 Swift-UVOT refined analysis
  8. GRB 080328: Suzaku WAM observation of the prompt emission
  9. Konus-Wind observation of GRB 080328
  10. GRB 080330: Redshift Confirmation from Hobby-Eberly Telescope Spectroscopy
  11. GRB080330: LOAO R-band Detection
  12. GRB 080330: GROND Observations
  13. GRB 080330: error in reported XRT position
  14. GRB080330 - SDSS Pre-Burst Observations
  15. GRB 080319B: Continued Gemini-South followup and possible host galaxy
  16. GRB 080328: BTA optical imaging and spectroscopy
  17. GRB 080328: Swift XRT refined analysis
  18. Swift/UVOT observations of GRB080328
  19. GRB080325 - I and z-band Imaging
  20. GRB080319B, BVRcIc field calibration
  21. GRB 080325: Subaru detection of NIR afterglow candidate
  22. GRB 080325: GROND Observations
  23. GRB 080325: Early observations from OSN
  24. GRB 080319C: Suzaku WAM observation of the prompt emission
  25. GRB 080319B: Second & Third Epoch WSRT Radio Observations
  26. GRB 080319D: GROND Observations
  27. GRB 080319B: optical upper limit
  28. GRB 080319D: optical upper limit
  29. GRB 080319C: UVOT Observations
  30. GRB 080319B: UVOT Observations
  31. GRB 080319A: UVOT Observations
  32. GRB 080320: optical limit
  33. Konus-Wind observation of GRB 080319C
  34. GRB 080319B optical observations
  35. Konus-Wind observation of GRB 080319B
  36. GRB 080320: SDSS source and Gemini-N observations
  37. GRB 080319C: Early RAPTOR Observations
  38. GRB 080319B: second epoch imaging from Canarias (correction to GCN7469)
  39. GRB 080319C: KAIT OA observations
  40. GRB 080320 - SDSS Pre-Burst Observations
  41. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  42. GRB 080319C - SDSS Pre-Burst Observations
  43. GRB 080319A SDSS Pre-Burst Observations
  44. GRB080319B - SDSS Pre-Burst Observations
  45. GRB 080319A: Swift-XRT Team Refined Analysis
  46. GRB 080319B: Swift-XRT Team Refined Analysis
  47. GRB 080319C: AGILE-MCAL observation of the prompt emission
  48. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  49. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  50. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  51. GRB 080319B: REM early data
  52. GRB 080319C: Early Super-LOTIS Observations
  53. GRB 080319B: Change in power law decay index
  54. GRB 080319A: optical observations at the NOT
  55. GRB 080319B: REM observations
  56. Swift trigger 306323: Swift-BAT/XRT refined analysis
  57. GRB080310 : Lulin Optical observations
  58. GRB080310, unusual slow decay in the optical
  59. GRB 080310: GAO 150cm telescope Optical Observation
  60. GRB080310 : Optical observations by LOAO and Lulin
  61. GRB 080310: ROTSE-III Observations of Optical Counterpart
  62. GRB 080307: GAO 150cm telescope Optical Observation
  63. GRB 080229A: GAO 150cm telescope Optical Observation
  64. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  65. GRB 080310, Swift-BAT refined analysis
  66. GRB 080310: Redshift from Keck/DEIMOS Spectra
  67. GRB 080310 - SDSS Pre-Burst Observations
  68. GRB 080310: VLT/UVES spectroscopy
  69. GRB 080310: REM observations
  70. GRB080307, optical upper limit
  71. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  72. GRB080229, optical upper limit
  73. GRB 080307, Swift-BAT refined analysis
  74. GRB080307 - SDSS Pre-Burst Observations
  75. GRB 080307: BOAO imaging - retraction and new limit
  76. GRB 080307: retraction of UVOT candidate
  77. GRB 080307, Preliminary Swift-BAT refined analysis
  78. Swift UVOT observations of GRB080229B
  79. GRB080229: Possible optical afterglow
  80. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  81. GRB 071010B : Early optical brightening detected by TAOS
  82. Swift-XRT improved positions, and new redshift limits.
  83. GRB 080204: Suzaku WAM observation of the prompt emission
  84. GRB 080212: Mount Abu NIR observations
  85. GRB 080211: Suzaku WAM observation of the prompt emission
  86. GRB 080212: REM refined analysis
  87. Konus-Wind observation of GRB 080211
  88. Swift/UVOT refined analysis of GRB080212
  89. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  90. IPN localization of GRB 080211
  91. GRB 080210: Swift/UVOT Refined Analysis
  92. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  93. GRB 080210: Super-LOTIS observations
  94. GRB 080210: VLT redshift
  95. GRB 080210: GOND detection in all bands and redshift upper limit
  96. GRB080210 - SDSS Pre-Burst Observations
  97. GRB 080207: GROND upper limits
  98. GRB 080205: GAO 150cm telescope Optical limit
  99. GRB 080207, Swift-BAT refined analysis
  100. GRB 080207, Swift-BAT refined analysis

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