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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"

24875 results found.

  1. GRB 020813 : KISO multiband optical observations
  2. GRB020813, optical observations
  3. IPN error box for GRB020813
  4. GRB020813, astrometric position
  5. Spectropolarimetry of GRB 020813
  6. GRB 020812 optical observation
  7. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  8. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  9. HST Imaging of the Host of GRB 011121
  10. GRB020801, optical afterglow candidate
  11. GRB020331: Late-time Optical Light Curve (re-submission)
  12. GRB020331: Late-time Optical Light Curve
  13. IPN triangulation of GRB020714
  14. IPN triangulation of GRB020715 (=GRB150702)
  15. IPN triangulation of GRB020714
  16. IPN triangulation of GRB150702
  17. GRB 020410: Discovery of Probable OT by HST
  18. GRB 020124, HST observations of the fading afterglow
  19. IPN triangulation of GRB020708
  20. IPN triangulation of GRB020708
  21. Correction to IPN error box for GRB020706
  22. IPN triangulation of GRB020706
  23. GRB 020705: Optical observations
  24. GRB 020625, optical observations
  25. GRB 020625: Optical observations
  26. GRB 020531: optical photometry of Chandra sources
  27. GRB020625 (=H2081): A Long Burst Localized by HETE
  28. The Probable Host Galaxy of GRB/XRF 020427
  29. GRB/XRF 020427, detection of an underlying system with the VLT
  30. Gemini IR Detection of AXP 1E 2259+586 Post-Burst
  31. AXP 1E2259+586 optical observations
  32. Fading Optical Source in the Field of GRB020531
  33. GRB 020531, INT+WFC deep optical upper limits
  34. SGR-like Bursts from the AXP 1E 2259+586
  35. GRB020405: polarimetric observations
  36. GRB 020531, simultaneous optical observations
  37. GRB 020531/Candidate Redshift
  38. GRB020531: Detection of Candidate Host Galaxy
  39. GRB020531: Second epoch Chandra observations
  40. GRB020604, optical observations
  41. GRB020604, BVRcIc field photometry
  42. GRB020603, BVRcIc field observations
  43. GRB020531, BVRcIc field photometry
  44. GRB020531 Optical Observations
  45. GRB020531: Observations with the Chandra X-ray Observatory
  46. GRB020531, optical observations
  47. GRB020531: optical observations
  48. GRB020531(=H2042): Optical Observations
  49. GRB020531(=H2042): Optical Observations
  50. GRB020531: Optical observations
  51. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  52. GRB020525, optical observations
  53. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow
  54. XRF020427: Chandra Identification of a Likely X-ray Counterpart
  55. HST detection of the likely host galaxy of GRB 020124
  56. GRB020405 field photometry at ESO
  57. XRF020427: Chandra Observations and Candidate X-ray Counterparts
  58. GRB(XRF) 020427: X-ray afterglow with BeppoSAX
  59. GRB020321 : Optical observations.
  60. XRF 020427
  61. GRB 020124: Optical observations
  62. IPN triangulation of GRB020418
  63. GRB020405: VLT observations of the OT environment
  64. IPN triangulation of GRB020413
  65. GRB020405: predicted break
  66. GRB 020409: No Evidence for an Optical Afterglow
  67. GRB 020331 Kyoto observation on March 31
  68. GRB020410: BeppoSAX NFI observation
  69. X-ray afterglow of GRB020321
  70. GRB020331 optical observations with RIMOTS
  71. GRB020124 optical observations with RIBOTS/RIMOTS
  72. GRB 020321: Candidate X-ray Counterparts
  73. GRB020406(?), optical observations
  74. GRB 020405: Decay index
  75. Short RXTE/ASM transient 020406; may be a GRB
  76. GRB020405, Radio Observations
  77. GRB 020405, U-band observations
  78. GRB011212: Optical Observations
  79. GRB 020331: NIR Observations
  80. GRB020331 NIR observation at KPNO (re-submission)
  81. GRB02033 NIR observation at KPNO
  82. GRB020331 field photometry
  83. GRB 020331, NIR observations
  84. GRB020331(=H1963): The "Easter" Burst Detected by HETE
  85. GRB 020322: BeppoSAX observations of the X-ray afterglow
  86. GRB011211: HST Observations of Optical Afterglow and Host Galaxy
  87. Near-Infrared Observations of GRB020322 at TIRGO
  88. GRB 020321, Radio Observations
  89. GRB 020322: Optical Observations
  90. GRB020127: Proposed Host Galaxy Detection and Identification of Afterglow
  91. GRB 020321: Optical observations
  92. GRB020317 BVRI field photometry
  93. GRB011211 revised BVRI field photometry
  94. GRB020305 BVRI field photometry
  95. GRB020322 BVRI field photometry
  96. GRB 020322: Optical Sources and Improved Astrometry
  97. GRB020317: optical observations
  98. GRB020321 optical observations
  99. GRB020321: a faint BeppoSAX detection
  100. GRB 020317 : KISO Optical Observations

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