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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"

32551 results found.

  1. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  2. XRF020903: TNG and Asiago photometry
  3. GRB 020903: Optical observations at RIKEN
  4. XRF 020903: Correction to GCN 1560
  5. XRF 020903: VRI observations
  6. IPN triangulation of GRB020926 (single large error box)
  7. GRB 020903: correction to GCN 1557
  8. XRF 020903: R band observations
  9. XRF 020903: Archival Optical Images
  10. Radio Observations of XRF 020903: The Missing Link
  11. XRF 020903: Supernova
  12. GRB020924 (ecliptic latitude-only localization)
  13. IPN triangulation of GRB020923 (two error boxes)
  14. IPN triangulation of GRB020914B
  15. Improved IPN position for GRB020918 (two large error boxes)
  16. IPN annulus for GRB020914B
  17. IPN triangulation of GRB020914 - clarification and additional information
  18. IPN triangulation of GRB020914
  19. GRB 020305: HST/STIS observations
  20. Confirmation of IPN error box for GRB020910
  21. IPN GCN Circulars now to be issued without restriction
  22. Single IPN error box for GRB020904
  23. XRF 020903: optical observation at Kyoto
  24. GRB020322 : HST/STIS observations
  25. XRF 020903: Optical observations
  26. IPN triangulation of GRB020904
  27. XRF 020903: Optical observations
  28. XRF 020903, optical observations
  29. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  30. INTEGRAL GRBs added to GCN
  31. GRB020813: optical observation
  32. GRB020812: optical observation
  33. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  34. GRB020813: High-resolution optical spectroscopy
  35. GRB020819: optical observations at Bisei
  36. GRB020812: negative optical observations
  37. GRB 020812: optical observation at Kyoto University
  38. Second epoch K band imaging of GRB 020819
  39. GRB020813, Baade 6.5m data now available
  40. GRB 020813 : HST observations
  41. Confirming no variability for GRB02081
  42. GRB 020812: early time optical observation at Ouda Station
  43. GRB020813: VRI Decay Slopes
  44. GRB 020819 : OT candidate - confirmation of non variability
  45. GRB 020819: Optical observations
  46. K band observation of GRB 020819
  47. GRB020819: optical observations
  48. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  49. HETE 2275: Optical observations
  50. GRB020813: optical and NIR observations
  51. GRB020813, UBVRI field calibration
  52. GRB 020813: addendum to GCN 1498
  53. GRB020813: optical observations at Bisei
  54. GRB020813: V-band decay slope
  55. GRB020812: NIR observations
  56. Polarimetry of GRB020813: evidence for variability
  57. GRB020813 IRAM millimeter observations
  58. GRB020813: High-Resolution Optical Observations
  59. GRB020813(=H2262): Revised Localization with HETE SXC
  60. GRB 020812: optical observation at Bisei
  61. GRB020813: Early Time Magnitude
  62. GRB020813: optical observations; possible host galaxy
  63. GRB 020813, radio detection
  64. GRB020813, optical observations
  65. Millimeter observation of GRB 020813
  66. GRB020812: optical observations
  67. GRB 020813 : KISO multiband optical observations
  68. GRB020813, optical observations
  69. IPN error box for GRB020813
  70. IPN triangulation of GRB020813
  71. GRB020812: possible afterglow candidate
  72. Early Time Limits for GRB020813
  73. GRB020813, astrometric position
  74. Spectropolarimetry of GRB 020813
  75. GRB 020813 Afterglow Observations; Possible break
  76. GRB 020813: Absorption redshift
  77. GRB020813: optical afterglow
  78. GRB020813: Fading of Candidate OT
  79. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  80. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  81. GRB 020715, optical observations
  82. GRB 020714, optical observations
  83. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  84. GRB020801: Candidate OT present in DSS
  85. Further refinement to IPN error box for GRB020531
  86. GRB020331: Late-time Optical Light Curve (re-submission)
  87. GRB020331: Late-time Optical Light Curve
  88. GRB 020405: HST observations reveal red bump
  89. IPN triangulation of GRB020714
  90. IPN triangulation of GRB020715 (=GRB150702)
  91. GRB 020410: Discovery of Probable OT by HST
  92. GRB 020124, HST observations of the fading afterglow
  93. IPN triangulation of GRB020708
  94. IPN triangulation of GRB020708
  95. IPN error box for GRB020706
  96. Correction to IPN error box for GRB020706
  97. IPN triangulation of GRB020706
  98. GRB 020625, optical observations
  99. GRB 020531: optical photometry of Chandra sources
  100. GRB020625 (=H2081): A Long Burst Localized by HETE

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