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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.

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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"

10966 results found.

  1. GRB041006: break in the light curve
  2. GRB041006 (= H3570): Chandra Observations In Progress
  3. GRB 041006: Optical decay
  4. GRB 041006 (=H3570): An X-Ray Rich GRB Localized in Real Time by HETE
  5. GRB 041006: Finding chart
  6. GRB 041006: Optical afterglow candidate
  7. GRB040924, RTT150 optical observation
  8. GRB 040924: detection of possible host galaxy by Subaru
  9. GRB040924, RTT150 optical observation
  10. GRB 040924: NIR finding chart
  11. GRB 040924: RTT150 optical observations
  12. IPN triangulation of GRB040924 (H3564)
  13. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  14. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  15. XRF040916: continuing decay of OT
  16. GRB040912(=H3557): Candidate Optical Afterglow
  17. XRF040916: Optical Transient Candidate by Subaru
  18. XRF 040912 (=H3557): Spectral and Temporal Properties
  19. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  20. GRB040916: Optical observations
  21. GRB040916 (= H3558): Improved Localization from HETE WXM
  22. GRB040916 (= H3558): A Long XRF Localized by HETE
  23. GRB040912 (= H3557): Chandra Observations Scheduled
  24. Optical observations of field of GRB040912
  25. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  26. GRB 040903 - INTEGRAL data analysis
  27. Very bright burst detected from SGR 1806-20
  28. Possible GRB 040903 detected with INTEGRAL
  29. GRB 040827: UKIRT - 2nd epoch K-band imaging
  30. GRB 040827: K imaging - no evidence of variability
  31. GRB 040827: RTT150 optical observations
  32. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  33. GRB 040812: Second epoch CXO Observations
  34. CXO observation of GRB 040812
  35. Bursting activity from SGR 1806-20 detected with IBAS
  36. IPN/HETE localizations of GRB040810 (=H3489)
  37. GRB 040812: a long GRB detected by INTEGRAL
  38. XRF040701: Optical Observations at ESO
  39. IPN/HETE triangulation of GRB040802 (=H3485)
  40. GRB 040730: a long GRB detected with INTEGRAL
  41. GRB040624: optical monitoring at TNG
  42. XRF040701: VLA Observations
  43. XRF040701 (=U11548): a bright XRF detected by HETE
  44. GRB 040624: optical observations
  45. GRB 040624: optical observations at TNG and VLT
  46. IPN Summary of SGR1806-20 Activity in 2004
  47. SGR 1806-20: no IR variability of the proposed counterparts
  48. GRB 040511: NIR observations with REM
  49. IBAS GRB Alerts n.1785 to 1791
  50. GRB 040511: Second Epoch Optical Observations
  51. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  52. IPN triangulation of GRB040425 (=H3183)
  53. On Line Availability of Archival HETE Fregate Data and Lightcurves
  54. GRB 040423 (=H3175): A Long GRB Localized by HETE
  55. IBAS GRB alerts 1739, 1740, 1741
  56. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  57. GRB 040403: Optical Observations
  58. GRB 040403: optical observations
  59. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  60. IBAS GRB Alert 1694
  61. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  62. GRB 040323: a long GRB detected with INTEGRAL
  63. IBAS GRB alerts 1679, 1680, 1681
  64. IBAS Alert 1678: not a GRB
  65. MASTER: RXTE GRB040308 optical observation
  66. IBAS results on a burst from SGR1806-20
  67. INTEGRAL detection of activity from SGR1806-20
  68. RXTE GRB040229 optical observation: no candidate
  69. IPN triangulation of GRB040228 (H3066, H3067)
  70. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  71. GRB 040223: Deep NIR NTT observations
  72. GRB 040223: REM IJK Observations
  73. GRB 040223: a long GRB detected with INTEGRAL
  74. Follow-up on IBAS GRB Alert 1379
  75. GRB040106: optical observations with REM+ROSS
  76. GRB 040106: Optical observations
  77. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  78. GRB 031220: Subaru observation
  79. GRB 031220: Optical observation at Tokyo Tech
  80. GRB031203, improved XMM position
  81. GRB 031203: Optical/IR Astrometry
  82. IPN/HETE localization of GRB031203B (=H2949; large error box)
  83. XMM-Newton Observation of GRB031203
  84. GRB031203: K' Photometry of the likely GRB host
  85. XMM-Newton Observation of GRB031203
  86. GRB 031203: IR NTTobservations do not confirm REM detection
  87. GRB 031203: IR REM Observations
  88. GRB 031203: A long GRB detected with INTEGRAL
  89. IPN triangulation of GRB031130 (large error box)
  90. IPN triangulation of GRB031120 (two large error boxes)
  91. GRB 031111B (= H2925) : Kyoto Optical Observation
  92. IPN/HETE localization of GRB031109 (=H2917; large error box)
  93. GRB 031111: Optical observations
  94. SN 2003jd (SN/GRB?) -- X-ray Observations
  95. HETE Prompt GRB Spectral Analyses
  96. IPN triangulation of GRB031111 (=H2924): small error box
  97. XRF031109 (=H2919): A very long XRF localized by HETE
  98. GRB030929/SN2003jd association unlikely based on IPN localiztion
  99. IPN triangulation of GRB031027 (small error box)
  100. Lulin optical follow-up observations of GRB031026

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