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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"

32701 results found.

  1. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  2. GRB040903 - A XRF?
  3. GRB040827: analysis of the XMM-Newton observation
  4. GRB040903, REM near-IR observation
  5. GRB 040903 - INTEGRAL data analysis
  6. Very bright burst detected from SGR 1806-20
  7. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  8. Possible GRB 040903 - further analysis
  9. GRB 040827 - Radio Observations
  10. XMM-Newton Images of GRB 040827
  11. GRB040825A: Optical observations
  12. GRB040825A: Optical observations
  13. GRB 040827: optical and NIR observations at the VLT
  14. GRB 040827: UKIRT - 2nd epoch K-band imaging
  15. GRB 040827: 2nd epoch of Magellan K-band imaging
  16. GRB 040827: K imaging - no evidence of variability
  17. GRB 040827: Detection of NIR afterglow
  18. GRB 040827: Possible detection of optical afterglow
  19. GRB 040827: RTT150 optical observations
  20. MASTER: GRB040827 possible OT
  21. GRB 040825B: Optical observations
  22. GRB040827 optical observations
  23. GRB 040827 - Refined position
  24. GRB040825B, BVRcIc field photometry
  25. GCN GRB OBSERBATION REPORT
  26. GRB040825B: optical observations
  27. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  28. GRB040825B: Correction to GCN 2657
  29. XRF040812: possible afterglow second Chandra observation
  30. GRB 040812: Second epoch CXO Observations
  31. XRF040812: GMRT observations
  32. XRF 040812: optical observation at VLT
  33. GRB 040812: Optical counterparts of CXO sources
  34. XRF040812: possible afterglow
  35. CXO observation of GRB 040812
  36. IPN/HETE localizations of GRB040810 (=H3489)
  37. GRB 040812: Keck and LCO optical observations
  38. GRB 040812: Keck and LCO observations
  39. GRB 040812: radio observations
  40. GRB040812, optical/IR observations
  41. XRF040701: Optical Observations at ESO
  42. IPN/HETE triangulation of GRB040802 (=H3485)
  43. GRB 040730, infrared observations
  44. GRB 040730: Optical observations
  45. Ongoing activity of SGR 1806-20
  46. GRB040624: optical monitoring at TNG
  47. XRF 040701 - optical observations of the decaying Chandra source
  48. XRF040701: Second-Epoch Chandra Observations
  49. XRF040701: VLA Observations
  50. XRF040701: Magellan Spectroscopy of Chandra Source #2 Associated Galaxy
  51. XRF040701: First-Epoch Chandra Observations
  52. GRB040709 J,H-band observations
  53. GRB040624, optical observations
  54. XRF 040701, optical observations
  55. GRB 040624: optical observations
  56. Optical Observations of GRB040624
  57. GRB 040624: optical observations at TNG and VLT
  58. GRB 040624: R-band observations
  59. GRB 040624, optical observations
  60. GRB 030329: Rebrightening of hyperluminal ejecta.
  61. IPN Summary of SGR1806-20 Activity in 2004
  62. GRB040511: Retraction of redshift identification
  63. SGR 1806-20: no IR variability of the proposed counterparts
  64. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  65. Activivty of SGR 1806-20
  66. GRB 040511, very fast decay?
  67. GRB 030324: Detection and Color of Host Galaxy
  68. GRB 040511: NIR observations with REM
  69. GRB040511: Redshift identifcation
  70. GRB 040511: Optical limit
  71. GRB040511: Candidate optical/NIR afterglow
  72. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  73. GRB 040511: Second Epoch Optical Observations
  74. GRB 040511: Optical observations
  75. GRB 040511: Optical Observations
  76. GRB040511: Optical Observations
  77. GRB040511: Optical Observations
  78. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  79. IPN triangulation of GRB040425 (=H3183)
  80. On Line Availability of Archival HETE Fregate Data and Lightcurves
  81. GRB040422, optical observations at Loiano
  82. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  83. GRB040422, BVRcIc field calibration
  84. GRB040422: optical and NIR observations at the VLT
  85. GRB 040403, deep optical observations
  86. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  87. GRB 040403: Optical Observations
  88. GRB 040403 Optical Observations
  89. GRB 040403: Optical observations
  90. GRB 040403: optical observations
  91. GRB 040403: Optical Observations
  92. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  93. GRB040323: NIR Observations and Variable Object
  94. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  95. GRB 040323, a dark GRB ?
  96. GRB040223: Deep NIR NTT data re-analysis
  97. GRB 040223: XMM-Newton results
  98. GRB040223, improved XMM position
  99. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  100. GRB 031203, possible supernova

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