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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.

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

42956 results found.

  1. TAROT Observations of GRB 040916 (HETE #3558)
  2. GRB040912(=H3557): Candidate Optical Afterglow
  3. XRF040916, optical observations
  4. XRF040916: Optical Transient Candidate by Subaru
  5. GRB040916 optical limits 17 min after GRB
  6. XRF 040912, identification of CXO sources
  7. XRF 040912 (=H3557): Spectral and Temporal Properties
  8. XRF040916, Ic observations
  9. XRF040916: optical follow-up observations
  10. XRF040912, BVRcIc field calibration
  11. XRF040916, BVRcIc field calibration
  12. GRB040916: Archival optical observations
  13. XRF 040916, optical follow-up
  14. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  15. GRB040916: Optical observations
  16. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  17. GRB040916 (= H3558): Improved Localization from HETE WXM
  18. GRB040916 (= H3558): A Long XRF Localized by HETE
  19. GRB040912 (= H3557): Chandra Observations Scheduled
  20. GRB 040912: Optical Observations
  21. GRB 040912, BVRI observations
  22. Optical observations of GRB/XRF 040912 = HETE 3557
  23. An intense burst from SGR1806-20
  24. GRB040912 : Kiso Optical follow-up observation
  25. IBAS GRB Alerts 1978-1980
  26. Optical observations of field of GRB040912
  27. HETE 3557: Optical observations
  28. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  29. GRB040903 - A XRF?
  30. GRB040827: analysis of the XMM-Newton observation
  31. GRB040903, REM near-IR observation
  32. GRB 040903 - INTEGRAL data analysis
  33. IBAS Alert 1974. Not a real GRB
  34. Very bright burst detected from SGR 1806-20
  35. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  36. Possible GRB 040903 - further analysis
  37. Possible GRB 040903 detected with INTEGRAL
  38. GRB 040827 - Radio Observations
  39. XMM-Newton Images of GRB 040827
  40. GRB 040827: optical and NIR observations at the VLT
  41. GRB 040827: UKIRT - 2nd epoch K-band imaging
  42. GRB 040827: 2nd epoch of Magellan K-band imaging
  43. GRB 040827: K imaging - no evidence of variability
  44. GRB 040827: Detection of NIR afterglow
  45. GRB 040827: Possible detection of optical afterglow
  46. GRB 040827: RTT150 optical observations
  47. GRB040827 XMM-Newton observation
  48. GRB040825A: optical limit before GRB
  49. MASTER: GRB040827 possible OT
  50. GRB 040825B: Optical observations
  51. GRB040827 optical observations
  52. GRB 040827 - Refined position
  53. GRB 040827 : peak flux
  54. GRB 040827 - A long GRB detected by INTEGRAL
  55. GRB040825B, BVRcIc field photometry
  56. GRB040825A, BVRcIc field photometry
  57. Increase of SGR 1806-20 activity
  58. GRB040825A: optical observations
  59. GRB040825B: optical observations
  60. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  61. MASTER: GRB040825a optical observation
  62. MASTER: GRB040825b optical observation
  63. GRB 040825: Optical observations
  64. XRF040812: possible afterglow second Chandra observation
  65. GRB 040812: Second epoch CXO Observations
  66. XRF040812: GMRT observations
  67. Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
  68. XRF 040812: optical observation at VLT
  69. GRB 040812: Optical counterparts of CXO sources
  70. XRF040812: possible afterglow
  71. CXO observation of GRB 040812
  72. Bursting activity from SGR 1806-20 detected with IBAS
  73. IPN/HETE localizations of GRB040810 (=H3489)
  74. GRB 040812: Keck and LCO optical observations
  75. GRB 040812: Keck and LCO observations
  76. GRB 040812: radio observations
  77. GRB040812, optical/IR observations
  78. Konus-Wind observation of GRB040810 (=H3489)
  79. GRB 040812: a long GRB detected by INTEGRAL
  80. GRB 040810: Optical observations of a limited region
  81. XRF040701: Optical Observations at ESO
  82. IPN/HETE triangulation of GRB040802 (=H3485)
  83. GRB 040730, infrared observations
  84. GRB 040730: Optical observations
  85. GRB 040730: a long GRB detected with INTEGRAL
  86. Ongoing activity of SGR 1806-20
  87. GRB040624: optical monitoring at TNG
  88. XRF 040701 - optical observations of the decaying Chandra source
  89. XRF040701: Second-Epoch Chandra Observations
  90. Cancellation of IBAS/INTEGRAL GRB alerts
  91. XRF040701: VLA Observations
  92. XRF040701: Magellan Spectroscopy of Chandra Source #2 Associated Galaxy
  93. XRF040701: First-Epoch Chandra Observations
  94. IBAS Alert 1836: NOT a real GRB
  95. GRB040709 J,H-band observations
  96. GRB040624, optical observations
  97. GRB040706:observation at University of Miyazaki
  98. XRF 040701, optical observations
  99. XRF040701 (=U11548): a bright XRF detected by HETE
  100. GRB 040624: optical observations

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