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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

23604 results found.

  1. IPN triangulation of GRB020706
  2. GRB 020625, optical observations
  3. GRB 020625: Optical observations
  4. GRB020625 (=H2081): A Long Burst Localized by HETE
  5. GRB/XRF 020427, detection of an underlying system with the VLT
  6. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  7. SGR-like X-ray Bursts from AXP 1E 2259+586: follow-up
  8. AXP 1E2259+586: quasi-simultaneous optical observation
  9. AXP 1E2259+586 optical observations
  10. SGR-like Bursts from the AXP 1E 2259+586
  11. GRB020405: polarimetric observations
  12. GRB 020531, simultaneous optical observations
  13. GRB 020604, optical observations
  14. GRB 020531/Candidate Redshift
  15. GRB020531: Second epoch Chandra observations
  16. GRB020604, optical observations
  17. GRB020604, BVRcIc field photometry
  18. GRB020603, BVRcIc field observations
  19. GRB020531, BVRcIc field photometry
  20. GRB020531 Optical observations with TAROT
  21. GRB020531 Optical observations with TAROT
  22. GRB 020418, optical/near-IR observations
  23. IPN triangulation of GRB020604
  24. GRB020531 Optical Observations
  25. GRB020531: Observations with the Chandra X-ray Observatory
  26. GRB 020603: Optical Observations
  27. GRB 020603, R-band observation
  28. Correction to IPN triangulation of GRB020603 (possible short/hard burst)
  29. IPN triangulation of GRB020603 (possible short/hard GRB)
  30. GRB 020531 optical observations with TAROT
  31. Refined IPN error box for GRB020531
  32. GRB020531: optical observations
  33. GRB020531(=H2042): Optical Observations
  34. IPN triangulation of the short, hard GRB020531 (=H2042)
  35. GRB020531(=H2042): Optical Observations
  36. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  37. GRB 020525: Optical Observations
  38. IPN triangulation of GRB020525
  39. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  40. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  41. GRB/XRF 020427, Radio Observations
  42. GRB020405 field photometry at ESO
  43. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  44. GRB 020410, Radio Observations
  45. IPN triangulation of GRB020418
  46. GRB020410: BeppoSAX NFI observations refined analysis
  47. GRB 020409: Optical Observations
  48. Mars Odyssey joins the IPN
  49. IPN triangulation of GRB020413
  50. GRB 020409: No Evidence for an Optical Afterglow
  51. GRB 020409, 2nd epoch optical observations
  52. GRB 020331 Kyoto observation on March 31
  53. GRB 020409 SARA Observations
  54. GRB "020411"
  55. GRB 020410, optical observations
  56. GRB 020409, optical observations
  57. X-ray afterglow of GRB020321
  58. GRB020405: VLT optical observations and V band decay slope
  59. GRB020331 optical observations with RIMOTS
  60. GRB020124 optical observations with RIBOTS/RIMOTS
  61. GRB 020321: Candidate X-ray Counterparts
  62. GRB 020405: Moderate-resolution spectroscopy
  63. GRB020405: VLT optical observations
  64. GRB 020331: Candidate Optical Afterglow
  65. Short RXTE/ASM transient 020406; may be a GRB
  66. Fading Optical Afterglow and Possible Host Galaxy of GRB 020405
  67. V band observations of GRB020405
  68. GRB 020405, U-band observations
  69. IPN localization of GRB020405
  70. GRB011212: Optical Observations
  71. GRB 020331: NIR Observations
  72. GRB020331 NIR observation at KPNO (re-submission)
  73. GRB02033 NIR observation at KPNO
  74. GRB020331 field photometry
  75. GRB 020331, NIR observations
  76. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  77. GRB 020322: BeppoSAX observations of the X-ray afterglow
  78. GRB 020321, Radio Observations
  79. GRB 020321: Optical observations
  80. GRB020317 BVRI field photometry
  81. GRB011211 revised BVRI field photometry
  82. GRB020305 BVRI field photometry
  83. GRB020322 BVRI field photometry
  84. GRB 020322 optical observations
  85. GRB 020322 optical observation
  86. GRB020317 : Near IR Observations from Mt Abu Observatory
  87. GRB020322, optical observations
  88. XMM-Newton observation of GRB020322
  89. GRB020317: optical observations
  90. GRB020321: BeppoSAX/NFI Observations
  91. GRB 020317 : KISO Optical Observations
  92. GRB020317 (=H1959): Localization by HETE of a Low Fluence GRB
  93. GRB 020305: Optical Observations
  94. GRB 020317: Optical observations
  95. GRB020305: Properties of the Candidate Optical Afterglow
  96. GRB011121, possible supernova association
  97. GRB020305: Subaru Optical Observations
  98. GRB 020305: Candidate optical afterglow
  99. GRB020305, optical observations
  100. GRB020305: Optical Observations

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