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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"

28261 results found.

  1. GRB041006: Optical photometry and spectroscopy at TNG
  2. GRB 041006: presice astrometry
  3. GRB041006, optical I observation
  4. GRB041006 (=HETE3570): optical observations
  5. ROTSE-IIIa Observations of GRB 041006
  6. GRB041006: MASTER optical observations
  7. GRB041006,optical observation
  8. Konus-Wind observation of a series SGR 1806-20 bursts on 041005
  9. GRB041006: Fading of optical afterglow candidate
  10. GRB 041006: Optical afterglow candidate
  11. Bursts from SGR 1806-20: Preliminary INTEGRAL results
  12. XRF 020903: Observations of the Host Galaxy
  13. radio observations, GRB 040924
  14. GRB040929,optical observation
  15. GRB040924,optical observation
  16. GRB040924,optical observation
  17. GRB 040924: detection of possible host galaxy by Subaru
  18. GRB040924: KAIT observations
  19. GRB040924 : Optical candidate observations at Lulin observatory
  20. GRB040924 : Optical candidate observations at Lulin observatory
  21. GRB 040924: Subaru NIR observation
  22. XRF 040912: Radio Observations
  23. XRF 040916: Radio Observations
  24. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  25. XRF040916: continuing decay of OT
  26. TAROT Observations of GRB 040916 (HETE #3558)
  27. GRB040912(=H3557): Candidate Optical Afterglow
  28. XRF040916, optical observations
  29. XRF 040912, identification of CXO sources
  30. XRF040912, BVRcIc field calibration
  31. XRF040916, BVRcIc field calibration
  32. GRB040916: Archival optical observations
  33. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  34. GRB040916: Optical observations
  35. GRB040912 (= H3557): Chandra Observations Scheduled
  36. GRB 040912: Optical Observations
  37. GRB/XRF040912,optical observations
  38. GRB 040912, BVRI observations
  39. Optical observations of field of GRB040912
  40. HETE 3557: Optical observations
  41. GRB040903 - A XRF?
  42. GRB040827: analysis of the XMM-Newton observation
  43. GRB040903, REM near-IR observation
  44. Very bright burst detected from SGR 1806-20
  45. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  46. Possible GRB 040903 - further analysis
  47. GRB 040827 - Radio Observations
  48. XMM-Newton Images of GRB 040827
  49. GRB 040827: optical and NIR observations at the VLT
  50. GRB 040827: UKIRT - 2nd epoch K-band imaging
  51. GRB 040827: 2nd epoch of Magellan K-band imaging
  52. GRB 040827: K imaging - no evidence of variability
  53. GRB 040827: Detection of NIR afterglow
  54. GRB040827 XMM-Newton observation
  55. GRB040825A: optical limit before GRB
  56. GRB 040825B: Optical observations
  57. GRB 040827 : Planned XMM-Newton observation
  58. GRB040825B, BVRcIc field photometry
  59. GRB040825A, BVRcIc field photometry
  60. GCN GRB OBSERBATION REPORT
  61. GRB 040825A,optical observations
  62. GRB040825A: optical observations
  63. GRB040825B: optical observations
  64. MASTER: GRB040825b optical observation
  65. GRB 040825: Optical observations
  66. XRF040812: possible afterglow second Chandra observation
  67. GRB 040812: Second epoch CXO Observations
  68. GRB040823,optical observation
  69. XRF040812: GMRT observations
  70. XRF 040812: optical observation at VLT
  71. GRB 040812: Optical counterparts of CXO sources
  72. XRF040812: possible afterglow
  73. CXO observation of GRB 040812
  74. GRB 040812: radio observations
  75. GRB040812, optical/IR observations
  76. GRB 040812: a long GRB detected by INTEGRAL
  77. XRF040701: Optical Observations at ESO
  78. GRB 040730, infrared observations
  79. GRB 040730: a long GRB detected with INTEGRAL
  80. Ongoing activity of SGR 1806-20
  81. GRB040624: optical monitoring at TNG
  82. XRF 040701 - optical observations of the decaying Chandra source
  83. XRF040701: Second-Epoch Chandra Observations
  84. XRF040701: VLA Observations
  85. XRF040701: First-Epoch Chandra Observations
  86. GRB040624, optical observations
  87. GRB040706:observation at University of Miyazaki
  88. Optical Observations of GRB040624
  89. GRB 040624: optical observations at TNG and VLT
  90. MASTER: GRB 040624 optical observation after 0,48d
  91. GRB 040624, optical observations
  92. GRB 040624 - A long GRB detected with INTEGRAL
  93. GRB 030329: Rebrightening of hyperluminal ejecta.
  94. IPN Summary of SGR1806-20 Activity in 2004
  95. SGR 1806-20: no IR variability of the proposed counterparts
  96. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  97. SGR 1806-20, potential NIR counterpart
  98. GRB 040606: Optical observations
  99. MASTER: HETE Alert 3274 optical observation
  100. Activivty of SGR 1806-20

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