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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"

26482 results found.

  1. GRB020813: Magellan BVRI Photometry
  2. GRB 020819 : OT candidate - confirmation of non variability
  3. GRB020819: optical observations
  4. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  5. IPN triangulation of GRB020819 (HETE 2275)
  6. GRB020813: Fading X-ray Afterglow Observed with Chandra
  7. GRB 020813: addendum to GCN 1498
  8. GRB020813: V-band decay slope
  9. GRB020812: NIR observations
  10. Polarimetry of GRB020813: evidence for variability
  11. GRB020813 IRAM millimeter observations
  12. GRB020813: High-Resolution Optical Observations
  13. GRB 020812: optical observation at Bisei
  14. GRB020813: Early Time Magnitude
  15. GRB020813: optical observations; possible host galaxy
  16. GRB 020813, radio detection
  17. GRB 020812 : optical afterglow candidate
  18. GRB020813, optical observations
  19. Millimeter observation of GRB 020813
  20. GRB020812: optical observations
  21. GRB020813, optical observations
  22. IPN error box for GRB020813
  23. IPN triangulation of GRB020813
  24. Early Time Limits for GRB020813
  25. GRB020813, astrometric position
  26. GRB 020813 Afterglow Observations; Possible break
  27. GRB 020813 multiband optical observations
  28. GRB020813: optical afterglow
  29. GRB020813: Fading of Candidate OT
  30. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  31. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  32. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  33. GRB020801: Candidate OT present in DSS
  34. GRB020331: Late-time Optical Light Curve (re-submission)
  35. GRB020331: Late-time Optical Light Curve
  36. GRB 020405: HST observations reveal red bump
  37. IPN triangulation of GRB020715 (=GRB150702)
  38. IPN triangulation of GRB020714
  39. IPN triangulation of GRB150702
  40. GRB 020410: Discovery of Probable OT by HST
  41. IPN triangulation of GRB020708
  42. IPN triangulation of GRB020708
  43. IPN triangulation of GRB020706
  44. GRB 020625, optical observations
  45. GRB 020531: optical photometry of Chandra sources
  46. GRB020625 (=H2081): A Long Burst Localized by HETE
  47. The Probable Host Galaxy of GRB/XRF 020427
  48. GRB/XRF 020427, detection of an underlying system with the VLT
  49. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  50. AXP 1E2259+586: quasi-simultaneous optical observation
  51. AXP 1E2259+586 optical observations
  52. Fading Optical Source in the Field of GRB020531
  53. GRB 020531, INT+WFC deep optical upper limits
  54. GRB 020531, simultaneous optical observations
  55. GRB020531: Second epoch Chandra observations
  56. GRB020531 Optical observations with TAROT
  57. GRB020531 Optical observations with TAROT
  58. GRB 020531, Radio Observations
  59. IPN triangulation of GRB020604
  60. GRB020531: Observations with the Chandra X-ray Observatory
  61. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  62. GRB020531: Upper Limit for Detection of Two TAROT Sources
  63. IPN triangulation of GRB020603 (possible short/hard GRB)
  64. IPN triangulation of the short, hard GRB020531 (=H2042)
  65. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  66. IPN detection of possible bursts from SGR1806-20
  67. IPN triangulation of GRB020525
  68. XRF 020427: Sudden Ionospheric Disturbance (SID)
  69. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  70. GRB/XRF 020427, Radio Observations
  71. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  72. GRB020321 : Optical observations.
  73. GRB020331: Third Epoch and Revised Second Epoch Optical
  74. The end of BSAX GRB activities
  75. GRB 020410, Radio Observations
  76. GRB 020124: Optical observations
  77. IPN triangulation of GRB020418
  78. GRB020405: VLT observations of the OT environment
  79. Mars Odyssey joins the IPN
  80. IPN triangulation of GRB020413
  81. GRB 020409, 2-nd epoch optical observations at Terskol.
  82. GRB020405: predicted break
  83. GRB 020409, No Optical Detection to R = 22
  84. GRB 020409, 2nd epoch optical observations
  85. GRB 020331 Kyoto observation on March 31
  86. GRB 020409, No Optical Detection to R = 20
  87. X-ray afterglow of GRB020321
  88. GRB020331: Confirmation of Afterglow Candidate with Magellan
  89. GRB020405: VLT optical observations and V band decay slope
  90. GRB020331 optical observations with RIMOTS
  91. GRB020124 optical observations with RIBOTS/RIMOTS
  92. ASM GRB candidate 020406 refined error box
  93. GRB020331: Optical Observations of Afterglow Candidate
  94. GRB020405: VLT optical observations
  95. GRB020405: OT observations
  96. GRB 020331: Candidate Optical Afterglow
  97. GRB 020405: Decay index
  98. GRB020405, Radio Observations
  99. V band observations of GRB020405
  100. GRB 020405, U-band observations

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