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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"

42640 results found.

  1. IPN triangulation of GRB020923 (two error boxes)
  2. IPN annulus for GRB020923
  3. IPN triangulation of GRB020914B
  4. Improved IPN position for GRB020918 (two large error boxes)
  5. IPN annulus for GRB020914B
  6. IPN triangulation of GRB020918 (annulus)
  7. IPN triangulation of GRB020911 (2 large error boxes)
  8. IPN triangulation of GRB020914 - clarification and additional information
  9. IPN triangulation of GRB020914
  10. GRB 020305: HST/STIS observations
  11. Confirmation of IPN error box for GRB020910
  12. IPN triangulation of GRB020910
  13. IPN GCN Circulars now to be issued without restriction
  14. Single IPN error box for GRB020904
  15. XRF 020903: optical observation at Kyoto
  16. GRB020322 : HST/STIS observations
  17. XRF 020903: Optical observations
  18. IPN triangulation of GRB020904
  19. XRF 020903: Optical observations
  20. IPN detection of a burst from SGR1900+14
  21. XRF 020903, optical observations
  22. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  23. INTEGRAL GRBs added to GCN
  24. GRB020813: optical observation
  25. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  26. SGR1900+14 burst localized by HETE
  27. GRB020813: High-resolution optical spectroscopy
  28. GRB020819: optical observations at Bisei
  29. GRB020812: negative optical observations
  30. GRB 020812: optical observation at Kyoto University
  31. Second epoch K band imaging of GRB 020819
  32. GRB020813, Baade 6.5m data now available
  33. GRB 020813 : HST observations
  34. Confirming no variability for GRB02081
  35. GRB020819 : Optical observations at KISO
  36. GRB 020812: early time optical observation at Ouda Station
  37. GRB020813: VRI Decay Slopes
  38. GRB020813: Magellan BVRI Photometry
  39. GRB 020819 : OT candidate - confirmation of non variability
  40. GRB 020819: Optical observations
  41. K band observation of GRB 020819
  42. GRB020819: optical observations
  43. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  44. IPN triangulation of GRB020819 (HETE 2275)
  45. HETE 2275: Optical observations
  46. GRB020813: optical and NIR observations
  47. GRB020813: Fading X-ray Afterglow Observed with Chandra
  48. GRB020813, UBVRI field calibration
  49. GRB 020813: addendum to GCN 1498
  50. GRB020813: optical observations at Bisei
  51. GRB020813: V-band decay slope
  52. GRB020812: NIR observations
  53. Polarimetry of GRB020813: evidence for variability
  54. GRB020813 IRAM millimeter observations
  55. GRB020812: optical observations
  56. GRB020813: High-Resolution Optical Observations
  57. GRB020813(=H2262): Revised Localization with HETE SXC
  58. GRB 020812: optical observation at Bisei
  59. GRB020813: Early Time Magnitude
  60. GRB020813: optical observations; possible host galaxy
  61. GRB 020813, radio detection
  62. GRB 020812 : optical afterglow candidate
  63. GRB020813, optical observations
  64. Millimeter observation of GRB 020813
  65. GRB020812: optical observations
  66. GRB 020813 : KISO multiband optical observations
  67. GRB020813, optical observations
  68. IPN error box for GRB020813
  69. IPN triangulation of GRB020813
  70. GRB020812: possible afterglow candidate
  71. Early Time Limits for GRB020813
  72. GRB020812: possible afterglow candidate
  73. GRB020813, astrometric position
  74. Spectropolarimetry of GRB 020813
  75. GRB 020813 Afterglow Observations; Possible break
  76. GRB 020813: Absorption redshift
  77. GRB 020813 multiband optical observations
  78. GRB020813: optical afterglow
  79. GRB020813: Fading of Candidate OT
  80. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  81. GRB020813: Candidate Optical Afterglow
  82. GRB 020812 optical observation
  83. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  84. GRB 020715, optical observations
  85. GRB 020714, optical observations
  86. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  87. GRB020801: Candidate OT present in DSS
  88. HST Imaging of the Host of GRB 011121
  89. GRB020801, optical afterglow candidate
  90. Further refinement to IPN error box for GRB020531
  91. GRB020331: Late-time Optical Light Curve (re-submission)
  92. GRB020331: Late-time Optical Light Curve
  93. GRB 020405: HST observations reveal red bump
  94. IPN triangulation of GRB020715 (=GRB150702)
  95. IPN triangulation of GRB020714
  96. IPN triangulation of GRB150702
  97. GRB 020410: Discovery of Probable OT by HST
  98. GRB 020124, HST observations of the fading afterglow
  99. IPN triangulation of GRB020708
  100. IPN triangulation of GRB020708

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