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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"

42435 results found.

  1. GRB040924 : Optical candidate observations at Lulin observatory
  2. GRB 040924: Subaru NIR observation
  3. GRB040924: Optical afterglow properties
  4. GRB 040924: RTT150 optical observations
  5. GRB 040924, optical follow-up
  6. GRB040924: MASTER: OT decay
  7. GRB040924: MASTER Optical observations
  8. IPN triangulation of GRB040924 (H3564)
  9. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  10. GRB040924 (H3564): Optical afterglow candidate
  11. XRF 040912: Radio Observations
  12. XRF 040916: Radio Observations
  13. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  14. XRF040916: continuing decay of OT
  15. GRB040912(=H3557): Candidate Optical Afterglow
  16. XRF040916, optical observations
  17. XRF040916: Optical Transient Candidate by Subaru
  18. GRB040916 optical limits 17 min after GRB
  19. XRF 040912, identification of CXO sources
  20. XRF 040912 (=H3557): Spectral and Temporal Properties
  21. XRF040916: optical follow-up observations
  22. XRF040912, BVRcIc field calibration
  23. XRF040916, BVRcIc field calibration
  24. GRB040916: Archival optical observations
  25. XRF 040916, optical follow-up
  26. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  27. GRB040916: Optical observations
  28. GRB040916 (= H3558): Improved Localization from HETE WXM
  29. GRB040916 (= H3558): A Long XRF Localized by HETE
  30. GRB040912 (= H3557): Chandra Observations Scheduled
  31. GRB 040912: Optical Observations
  32. GRB/XRF040912,optical observations
  33. GRB 040912, BVRI observations
  34. Optical observations of GRB/XRF 040912 = HETE 3557
  35. An intense burst from SGR1806-20
  36. GRB040912 : Kiso Optical follow-up observation
  37. IBAS GRB Alerts 1978-1980
  38. Optical observations of field of GRB040912
  39. HETE 3557: Optical observations
  40. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  41. GRB 040827: XMM-Newton data
  42. GRB040903 - A XRF?
  43. GRB040827: analysis of the XMM-Newton observation
  44. GRB040903, REM near-IR observation
  45. GRB 040903 - INTEGRAL data analysis
  46. Very bright burst detected from SGR 1806-20
  47. Possible GRB 040903 detected with INTEGRAL
  48. GRB 040827 - Radio Observations
  49. GRB040825A: Optical observations
  50. GRB040825A: Optical observations
  51. GRB 040827: optical and NIR observations at the VLT
  52. GRB 040827: UKIRT - 2nd epoch K-band imaging
  53. GRB 040827: 2nd epoch of Magellan K-band imaging
  54. GRB 040827: K imaging - no evidence of variability
  55. GRB 040827: Detection of NIR afterglow
  56. GRB 040827: Possible detection of optical afterglow
  57. GRB 040827: RTT150 optical observations
  58. GRB040827 XMM-Newton observation
  59. GRB040825A: optical limit before GRB
  60. MASTER: GRB040827 possible OT
  61. GRB 040825B: Optical observations
  62. GRB040827 optical observations
  63. GRB 040827 : Planned XMM-Newton observation
  64. GRB 040827 - Refined position
  65. GRB 040827 - A long GRB detected by INTEGRAL
  66. GRB040825B, BVRcIc field photometry
  67. GRB040825A, BVRcIc field photometry
  68. GCN GRB OBSERBATION REPORT
  69. GRB 040825A,optical observations
  70. GRB040825A: optical observations
  71. GRB040825B: optical observations
  72. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  73. GRB 040825A: Optical observations.
  74. MASTER: GRB040825a optical observation
  75. MASTER: GRB040825b optical observation
  76. GRB 040825: Optical observations
  77. XRF040812: possible afterglow second Chandra observation
  78. GRB 040812: Second epoch CXO Observations
  79. GRB040823,optical observation
  80. XRF040812: GMRT observations
  81. Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
  82. XRF 040812: optical observation at VLT
  83. GRB 040812: Optical counterparts of CXO sources
  84. XRF040812: possible afterglow
  85. CXO observation of GRB 040812
  86. Bursting activity from SGR 1806-20 detected with IBAS
  87. IPN/HETE localizations of GRB040810 (=H3489)
  88. GRB 040812: Keck and LCO optical observations
  89. GRB 040812: Keck and LCO observations
  90. GRB 040812: radio observations
  91. GRB040812, optical/IR observations
  92. GRB 040812: a long GRB detected by INTEGRAL
  93. GRB 040810: Optical observations of a limited region
  94. XRF040701: Optical Observations at ESO
  95. IPN/HETE triangulation of GRB040802 (=H3485)
  96. GRB 040730, infrared observations
  97. GRB 040730: Optical observations
  98. GRB 040730: a long GRB detected with INTEGRAL
  99. Ongoing activity of SGR 1806-20
  100. GRB040624: optical monitoring at TNG

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