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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"

28098 results found.

  1. GRB021211 (=H2493): A Bright, Long GRB Localized by HETE-2 in Near-Real Time
  2. IPN triangulation of GRB021206 (small error box)
  3. IPN triangulation of GRB021205 (large error box)
  4. GRB021201, BVRcIc field photometry
  5. GRB 021201: BOOTES simultaneous optical observations
  6. IPN triangulation of GRB021201 (short/hard burst, small error box)
  7. GRB021004, late time optical observations
  8. GRB021004 Chandra Observation
  9. IPN detection of continued SGR1900+14 activity
  10. Improved IPN error box for GRB021125
  11. IPN BURST POSITION
  12. IPN triangulation of GRB021125 (INTEGRAL BURST)
  13. GRB021125 : A long GRB localized by INTEGRAL
  14. IPN confirmation of the reactivation of SGR1900+14
  15. GRB021113, SPI ACS observation
  16. GRB 021112: Afterglow or Variable Star?
  17. GRB021113: optical observations at Bisei
  18. GRB 021113: Evidence for a Dark Optical Afterglow
  19. GRB021112, BVRI field photometry
  20. GRB 021112: Variable Source in R-band search
  21. GRB021112: Optical Observations
  22. IPN triangulation of GRB021113 (=H2449; annulus)
  23. GRB 021113: Optical observations
  24. GRB 021112: RAPTOR Observations
  25. GRB021113 (=H2449): A Long GRB Localized by HETE
  26. GRB021112 (=H2448): A Long GRB Localized by HETE
  27. GRB 021016: Optical Observations
  28. GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
  29. IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
  30. SGR1900+14 activity, November 2-4, 2002
  31. GRB021104: optical observations
  32. Detection of activity from SGR 1900+14 with the RXTE/PCA
  33. IPN triangulation of GRB021027 (single large error box)
  34. IPN triangulation of GRB021027 (two large error boxes)
  35. GRB 021023: Curious K-band Source(s) Just Outside of IPN Localization
  36. GRB 021004: optical observations
  37. IPN triangulation of GRB021023 (small error boc)
  38. GRB 020813; likely host galaxy.
  39. IPN triangulation of GRB021020 (smaller error box)
  40. IPN triangulation of GRB021020
  41. GRB 021008, optical observations
  42. IPN triangulation of GRB021016 (small error box)
  43. IPN triangulation of GRB021014 (large error box)
  44. IPN triangulation of GRB021013 (single error box)
  45. GRB 021004: optical spectroscopy on Oct 11
  46. IPN triangulation of GRB021013 (two small error boxes)
  47. GRB021004: High-resolution optical spectroscopy
  48. XRF 020903: flattening of the optical light curve.
  49. GRB021004, UBVRcIc field photometry update
  50. IPN triangulation of GRB021008 (single error box)
  51. GRB 021004 submm observations
  52. IPN triangulation of GRB021008 (two small error boxes)
  53. GRB021004 Chandra HETG Observations
  54. GRB 021004: Optical/NIR Observations
  55. GRB 021004: Additional V-band Polarimetric Observations
  56. GRB021004: optical observation
  57. GRB 021004: Host Galaxy Star Formation Rate
  58. GRB 021004 submm observations
  59. GRB 021004: WC wind?
  60. GRB021004: NIR and Optical observations
  61. GRB 021004: Optical observations, AUDE network
  62. GRB 021004 - VLA Radio Observations
  63. GRB 021004 - Unusual Radio-to-Submm Spectrum
  64. GRB 021004: optical spectroscopy
  65. IPN triangulation of GRB021007 (annulus)
  66. GRB021004: optical observations and predicted break time
  67. GRB021004: BVRc photometry
  68. GRB021004 radio observation
  69. HETE fluences for GRB021004
  70. GRB 021004: Optical Photometry at 2.5 Days
  71. GRB 021004: polarimetric observations
  72. GRB 021004: V-band Polarimetric Observations
  73. GRB021004: Update Bisei photometric data
  74. IRAM Millimeter detection of GRB 021004
  75. GRB 021004 radio observation
  76. GRB 021004: Optical Photometry at 1.5 Days
  77. GRB021004, BVRcIc field photometry
  78. GRB021004: Optical Spectroscopy
  79. GRB 021004 radio search
  80. XRF020903, BVRI field photometry
  81. XRF020903: TNG and Asiago photometry
  82. GRB 020903: Optical observations at RIKEN
  83. XRF 020903: Correction to GCN 1560
  84. XRF 020903: VRI observations
  85. XRF 020903: R band observations
  86. XRF 020903: Archival Optical Images
  87. Radio Observations of XRF 020903: The Missing Link
  88. XRF 020903: Supernova
  89. IPN triangulation of GRB020923 (two error boxes)
  90. IPN triangulation of GRB020914B
  91. IPN triangulation of GRB020911 (2 large error boxes)
  92. GRB 020305: HST/STIS observations
  93. Confirmation of IPN error box for GRB020910
  94. IPN triangulation of GRB020910
  95. IPN GCN Circulars now to be issued without restriction
  96. Single IPN error box for GRB020904
  97. XRF 020903: optical observation at Kyoto
  98. GRB020322 : HST/STIS observations
  99. XRF 020903: Optical observations
  100. IPN triangulation of GRB020904

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