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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"

32567 results found.

  1. Further refinement to IPN error box for GRB020531
  2. GRB020331: Late-time Optical Light Curve (re-submission)
  3. GRB020331: Late-time Optical Light Curve
  4. GRB 020405: HST observations reveal red bump
  5. IPN triangulation of GRB020714
  6. IPN triangulation of GRB020715 (=GRB150702)
  7. GRB 020410: Discovery of Probable OT by HST
  8. GRB 020124, HST observations of the fading afterglow
  9. IPN triangulation of GRB020708
  10. IPN triangulation of GRB020708
  11. IPN error box for GRB020706
  12. Correction to IPN error box for GRB020706
  13. IPN triangulation of GRB020706
  14. GRB 020625, optical observations
  15. GRB 020531: optical photometry of Chandra sources
  16. GRB020625 (=H2081): A Long Burst Localized by HETE
  17. The Probable Host Galaxy of GRB/XRF 020427
  18. GRB/XRF 020427, detection of an underlying system with the VLT
  19. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  20. AXP 1E2259+586: quasi-simultaneous optical observation
  21. AXP 1E2259+586 optical observations
  22. Fading Optical Source in the Field of GRB020531
  23. GRB 020531, INT+WFC deep optical upper limits
  24. GRB020405: polarimetric observations
  25. GRB 020531, simultaneous optical observations
  26. GRB 020604, optical observations
  27. GRB 020531/Candidate Redshift
  28. GRB020531: Detection of Candidate Host Galaxy
  29. GRB020531: Second epoch Chandra observations
  30. GRB020604, optical observations
  31. GRB020604, BVRcIc field photometry
  32. GRB020603, BVRcIc field observations
  33. GRB020531, BVRcIc field photometry
  34. GRB020531 Optical observations with TAROT
  35. GRB020531 Optical observations with TAROT
  36. GRB 020531, Radio Observations
  37. GRB020531 Optical Observations
  38. GRB 020603: Optical Observations
  39. GRB 020603, R-band observation
  40. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  41. GRB020531: Upper Limit for Detection of Two TAROT Sources
  42. GRB 020603: Optical observations
  43. GRB 020531 optical observations with TAROT
  44. Refined IPN error box for GRB020531
  45. GRB020531, optical observations
  46. GRB020531: optical observations
  47. GRB020531(=H2042): Optical Observations
  48. IPN triangulation of the short, hard GRB020531 (=H2042)
  49. GRB020531(=H2042): Optical Observations
  50. GRB020531: Optical observations
  51. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  52. GRB 020525: Optical Observations
  53. GRB020525, optical observations
  54. IPN detection of possible bursts from SGR1806-20
  55. XRF 020427: Sudden Ionospheric Disturbance (SID)
  56. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  57. GRB/XRF 020427, Radio Observations
  58. HST detection of the likely host galaxy of GRB 020124
  59. GRB020405 field photometry at ESO
  60. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  61. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  62. GRB020321 : Optical observations.
  63. GRB020331: Third Epoch and Revised Second Epoch Optical
  64. GRB 020410, Radio Observations
  65. GRB 020418: Optical observations
  66. GRB 020124: Optical observations
  67. GRB 020418: Optical observations
  68. GRB020405: VLT observations of the OT environment
  69. GRB020410: BeppoSAX NFI observations refined analysis
  70. GRB 020409: Optical Observations
  71. Mars Odyssey joins the IPN
  72. GRB 020409, 2-nd epoch optical observations at Terskol.
  73. GRB020405: predicted break
  74. GRB 020409: Optical observations
  75. GRB 020409, No Optical Detection to R = 22
  76. GRB 020409: No Evidence for an Optical Afterglow
  77. GRB 020409, 2nd epoch optical observations
  78. GRB 020331 Kyoto observation on March 31
  79. GRB 020409, No Optical Detection to R = 20
  80. GRB 020409: Optical observations
  81. GRB 020410, optical observations
  82. GRB 020409, optical observations
  83. GRB 020409: Optical Observations
  84. GRB020406(?), optical observations
  85. X-ray afterglow of GRB020321
  86. GRB020331: Confirmation of Afterglow Candidate with Magellan
  87. GRB020405: VLT optical observations and V band decay slope
  88. GRB020331 optical observations with RIMOTS
  89. GRB020124 optical observations with RIBOTS/RIMOTS
  90. GRB 020321: Candidate X-ray Counterparts
  91. ASM GRB candidate 020406 refined error box
  92. GRB 020405: Moderate-resolution spectroscopy
  93. GRB020331: Optical Observations of Afterglow Candidate
  94. GRB020406(?), optical observations
  95. GRB020405: VLT optical observations
  96. Revised Photometry of the Optical Afterglow of GRB 020405
  97. GRB020405: OT observations
  98. GRB 020331: Candidate Optical Afterglow
  99. GRB 020405: Decay index
  100. GRB020405, Radio Observations

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