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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"

41907 results found.

  1. IPN triangulation of a burst from SGR1900+14 on October 29 2002
  2. IPN triangulation of GRB021025 (portion of annulus)
  3. IPN triangulation of GRB021027 (single large error box)
  4. GRB021004, late-time optical observations
  5. IPN triangulation of GRB021027 (two large error boxes)
  6. GRB 021023: Infrared Imaging
  7. GRB 021023: Curious K-band Source(s) Just Outside of IPN Localization
  8. IPN triangulation of SGR1900+14, October 22 2002
  9. GRB 021004: optical observations
  10. GRB021004: Optical Observations
  11. GRB 020813; likely host galaxy.
  12. IPN triangulation of GRB021020 (smaller error box)
  13. GRB021021(=XRF 021021): An X-ray Flash Localized by HETE
  14. GRB 021008, radio observations
  15. GRB 021016, optical observations
  16. GRB 021004: VRI observations at TNG: possible break
  17. GRB021016, optical observations
  18. SGR1900+14: burst on October 10 2002
  19. GRB 021008, optical observations
  20. GRB021016(=H2397): A Long GRB Localized by HETE
  21. IPN triangulation of GRB021016 (area corrected)
  22. IPN triangulation of GRB021016 (small error box)
  23. GRB021004: Optical Observations
  24. IPN triangulation of GRB021013 (single error box)
  25. GRB 021004: optical spectroscopy on Oct 11
  26. IPN triangulation of GRB021013 (two small error boxes)
  27. GRB021004: High-resolution optical spectroscopy
  28. IPN triangulation of GRB021013 (annulus)
  29. XRF 020903: flattening of the optical light curve.
  30. GRB021004, UBVRcIc field photometry update
  31. IPN triangulation of GRB021008 (single error box)
  32. GRB021004: Optical Observations
  33. GRB 021004 submm observations
  34. IPN triangulation of GRB021008B (annulus)
  35. IPN triangulation of GRB021008 (two small error boxes)
  36. GRB021004 Chandra HETG Observations
  37. GRB 021004: Optical/NIR Observations
  38. GRB 021004: Additional V-band Polarimetric Observations
  39. GRB021004: optical observation
  40. GRB 021004: Host Galaxy Star Formation Rate
  41. GRB 021004 submm observations
  42. GRB 021004: WC wind?
  43. GRB021004: NIR and Optical observations
  44. GRB 021004: Optical measurement at OHP
  45. GRB 021004: Optical observations, AUDE network
  46. GRB 021004 - VLA Radio Observations
  47. GRB 021004 - Unusual Radio-to-Submm Spectrum
  48. GRB 021004: optical spectroscopy
  49. XRF 020903 spectrum
  50. GRB 021004: HST/STIS spectroscopic observations
  51. GRB021004: optical observations and predicted break time
  52. GRB021004: BVRc photometry
  53. GRB 021004 redshift
  54. GRB021004: restart of optical decay
  55. GRB 021004: Optical Decay
  56. GRB 021004 continued IR fading
  57. HETE fluences for GRB021004
  58. GRB 021004, spectroscopic observations
  59. GRB021004: not fading anymore?
  60. GRB 021004: Optical Photometry at 2.5 Days
  61. GRB 021004: polarimetric observations
  62. GRB 021004: V-band Polarimetric Observations
  63. GRB021004: Update Bisei photometric data
  64. GRB 021004: Optical Decay
  65. GRB021004, astrometric position
  66. GRB021004, Optical Observations
  67. IRAM Millimeter detection of GRB 021004
  68. GRB 021004: Optical observations at RIKEN
  69. GRB 021004 radio observation
  70. GRB 021004: Optical Observations
  71. GRB021004: continued fading
  72. GRB 021004: Optical Photometry at 1.5 Days
  73. GRB021004, Optical Observations
  74. GRB021004, BVRcIc field photometry
  75. GRB 021004: Optical observations
  76. GRB 021004: optical counterpart
  77. GRB 021004, optical observations
  78. GRB021004: Optical Spectroscopy
  79. GRB 021004: Optical Observations
  80. GRB 021004, SPM optical observations
  81. GRB 021004, optical observations
  82. GRB 021004 radio search
  83. GRB 021004: radio observations
  84. GRB 021004: steepening of the optical decay slope
  85. GRB021004: Upper limits from recent and historical observations
  86. XRF020903, BVRI field photometry
  87. GRB021004: optical observations at Nyrola
  88. GRB021004: Absorption redshift
  89. GRB021004(=H2380): Revised Localization with HETE Soft X-ray
  90. GRB021004: optical observations at Bisei
  91. GRB 021004: Kyoto observation
  92. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  93. GRB021004: Optical Afterglow
  94. XRF020903: TNG and Asiago photometry
  95. GRB 020903: Optical observations at RIKEN
  96. XRF 020903: Correction to GCN 1560
  97. XRF 020903: VRI observations
  98. IPN triangulation of GRB020926 (single large error box)
  99. GRB 020903: correction to GCN 1557
  100. XRF 020903: R band observations

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