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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"

32552 results found.

  1. GRB 021004: Kyoto observation
  2. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  3. XRF020903: TNG and Asiago photometry
  4. GRB 020903: Optical observations at RIKEN
  5. XRF 020903: Correction to GCN 1560
  6. XRF 020903: VRI observations
  7. IPN triangulation of GRB020926 (single large error box)
  8. GRB 020903: correction to GCN 1557
  9. XRF 020903: R band observations
  10. XRF 020903: Archival Optical Images
  11. Radio Observations of XRF 020903: The Missing Link
  12. XRF 020903: Supernova
  13. GRB020924 (ecliptic latitude-only localization)
  14. IPN triangulation of GRB020923 (two error boxes)
  15. IPN triangulation of GRB020914B
  16. Improved IPN position for GRB020918 (two large error boxes)
  17. IPN annulus for GRB020914B
  18. IPN triangulation of GRB020914 - clarification and additional information
  19. IPN triangulation of GRB020914
  20. GRB 020305: HST/STIS observations
  21. Confirmation of IPN error box for GRB020910
  22. IPN GCN Circulars now to be issued without restriction
  23. Single IPN error box for GRB020904
  24. XRF 020903: optical observation at Kyoto
  25. GRB020322 : HST/STIS observations
  26. XRF 020903: Optical observations
  27. IPN triangulation of GRB020904
  28. XRF 020903: Optical observations
  29. XRF 020903, optical observations
  30. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  31. INTEGRAL GRBs added to GCN
  32. GRB020813: optical observation
  33. GRB020812: optical observation
  34. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  35. GRB020813: High-resolution optical spectroscopy
  36. GRB020819: optical observations at Bisei
  37. GRB020812: negative optical observations
  38. GRB 020812: optical observation at Kyoto University
  39. Second epoch K band imaging of GRB 020819
  40. GRB020813, Baade 6.5m data now available
  41. GRB 020813 : HST observations
  42. Confirming no variability for GRB02081
  43. GRB 020812: early time optical observation at Ouda Station
  44. GRB020813: VRI Decay Slopes
  45. GRB 020819 : OT candidate - confirmation of non variability
  46. GRB 020819: Optical observations
  47. K band observation of GRB 020819
  48. GRB020819: optical observations
  49. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  50. HETE 2275: Optical observations
  51. GRB020813: optical and NIR observations
  52. GRB020813, UBVRI field calibration
  53. GRB 020813: addendum to GCN 1498
  54. GRB020813: optical observations at Bisei
  55. GRB020813: V-band decay slope
  56. GRB020812: NIR observations
  57. Polarimetry of GRB020813: evidence for variability
  58. GRB020813 IRAM millimeter observations
  59. GRB020813: High-Resolution Optical Observations
  60. GRB020813(=H2262): Revised Localization with HETE SXC
  61. GRB 020812: optical observation at Bisei
  62. GRB020813: Early Time Magnitude
  63. GRB020813: optical observations; possible host galaxy
  64. GRB 020813, radio detection
  65. GRB020813, optical observations
  66. Millimeter observation of GRB 020813
  67. GRB020812: optical observations
  68. GRB 020813 : KISO multiband optical observations
  69. GRB020813, optical observations
  70. IPN error box for GRB020813
  71. IPN triangulation of GRB020813
  72. GRB020812: possible afterglow candidate
  73. Early Time Limits for GRB020813
  74. GRB020813, astrometric position
  75. Spectropolarimetry of GRB 020813
  76. GRB 020813 Afterglow Observations; Possible break
  77. GRB 020813: Absorption redshift
  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. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  82. GRB 020715, optical observations
  83. GRB 020714, optical observations
  84. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  85. GRB020801: Candidate OT present in DSS
  86. Further refinement to IPN error box for GRB020531
  87. GRB020331: Late-time Optical Light Curve (re-submission)
  88. GRB020331: Late-time Optical Light Curve
  89. GRB 020405: HST observations reveal red bump
  90. IPN triangulation of GRB020714
  91. IPN triangulation of GRB020715 (=GRB150702)
  92. GRB 020410: Discovery of Probable OT by HST
  93. GRB 020124, HST observations of the fading afterglow
  94. IPN triangulation of GRB020708
  95. IPN triangulation of GRB020708
  96. IPN error box for GRB020706
  97. Correction to IPN error box for GRB020706
  98. IPN triangulation of GRB020706
  99. GRB 020625, optical observations
  100. GRB 020531: optical photometry of Chandra sources

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