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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"

16034 results found.

  1. GRB021016, optical observations
  2. GRB 021008, optical observations
  3. GRB021016(=H2397): A Long GRB Localized by HETE
  4. GRB021004: Optical Observations
  5. GRB 021004: optical spectroscopy on Oct 11
  6. GRB021004: High-resolution optical spectroscopy
  7. XRF 020903: flattening of the optical light curve.
  8. GRB021004: Optical Observations
  9. GRB021004 Chandra HETG Observations
  10. GRB 021004: Optical/NIR Observations
  11. GRB 021004: Additional V-band Polarimetric Observations
  12. GRB021004: optical observation
  13. GRB 021004: WC wind?
  14. GRB021004: NIR and Optical observations
  15. GRB 021004: Optical measurement at OHP
  16. GRB 021004: Optical observations, AUDE network
  17. GRB 021004: optical spectroscopy
  18. XRF 020903 spectrum
  19. GRB021004: optical observations and predicted break time
  20. GRB021004: BVRc photometry
  21. GRB 021004 redshift
  22. GRB021004: restart of optical decay
  23. GRB 021004: Optical Decay
  24. GRB 021004 continued IR fading
  25. HETE fluences for GRB021004
  26. GRB 021004, spectroscopic observations
  27. GRB 021004: Optical Photometry at 2.5 Days
  28. GRB 021004: V-band Polarimetric Observations
  29. GRB 021004: Optical Decay
  30. GRB021004, astrometric position
  31. GRB021004, Optical Observations
  32. GRB 021004: Optical observations at RIKEN
  33. GRB 021004: Optical Observations
  34. GRB 021004: Optical Photometry at 1.5 Days
  35. GRB021004, Optical Observations
  36. GRB 021004: Optical observations
  37. GRB 021004: optical counterpart
  38. GRB 021004, optical observations
  39. GRB021004: Optical Spectroscopy
  40. GRB 021004: Optical Observations
  41. GRB 021004, SPM optical observations
  42. GRB 021004, optical observations
  43. GRB 021004: radio observations
  44. GRB 021004: steepening of the optical decay slope
  45. GRB021004: Upper limits from recent and historical observations
  46. GRB021004: optical observations at Nyrola
  47. GRB021004: Absorption redshift
  48. GRB021004(=H2380): Revised Localization with HETE Soft X-ray
  49. GRB021004: optical observations at Bisei
  50. GRB 021004: Kyoto observation
  51. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  52. GRB021004: Optical Afterglow
  53. GRB 020903: Optical observations at RIKEN
  54. XRF 020903: Archival Optical Images
  55. Radio Observations of XRF 020903: The Missing Link
  56. XRF 020903: Supernova
  57. GRB 020305: HST/STIS observations
  58. XRF 020903: optical observation at Kyoto
  59. GRB020322 : HST/STIS observations
  60. XRF 020903: Optical observations
  61. XRF 020903: Optical observations
  62. XRF 020903, optical observations
  63. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  64. GRB020813: optical observation
  65. GRB020812: optical observation
  66. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  67. SGR1900+14 burst localized by HETE
  68. GRB020813: High-resolution optical spectroscopy
  69. GRB020819: optical observations at Bisei
  70. GRB020812: negative optical observations
  71. GRB 020812: optical observation at Kyoto University
  72. GRB 020813 : HST observations
  73. GRB020819 : Optical observations at KISO
  74. GRB 020812: early time optical observation at Ouda Station
  75. GRB 020819: Optical observations
  76. GRB020819: optical observations
  77. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  78. HETE 2275: Optical observations
  79. GRB020813: optical and NIR observations
  80. GRB020813: Fading X-ray Afterglow Observed with Chandra
  81. GRB020813, UBVRI field calibration
  82. GRB 020813: addendum to GCN 1498
  83. GRB020813: optical observations at Bisei
  84. GRB020813: V-band decay slope
  85. Polarimetry of GRB020813: evidence for variability
  86. GRB020812: optical observations
  87. GRB020813: High-Resolution Optical Observations
  88. GRB020813(=H2262): Revised Localization with HETE SXC
  89. GRB 020812: optical observation at Bisei
  90. GRB020813: optical observations; possible host galaxy
  91. GRB 020813, radio detection
  92. GRB 020812 : optical afterglow candidate
  93. GRB020813, optical observations
  94. GRB020812: optical observations
  95. GRB 020813 : KISO multiband optical observations
  96. GRB020813, optical observations
  97. IPN triangulation of GRB020813
  98. GRB020812: possible afterglow candidate
  99. Early Time Limits for GRB020813
  100. GRB020812: possible afterglow candidate

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