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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"

3779 results found.

  1. GRB040709 J,H-band observations
  2. Optical Observations of GRB040624
  3. IPN Summary of SGR1806-20 Activity in 2004
  4. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  5. SGR 1806-20, potential NIR counterpart
  6. GRB040228 : KISO optical follow-up observation
  7. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  8. GRB 040223: a long GRB detected with INTEGRAL
  9. GRB 031220: Optical observations of Chandra X-ray sources
  10. IPN triangulation of an intermediate burst from SGR1806-20
  11. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  12. GRB 031203: Discovery of a dust echo
  13. GRB 031203: A long GRB detected with INTEGRAL
  14. GRB 031111: Optical observations
  15. XRF031109 (=H2919): A very long XRF localized by HETE
  16. IPN triangulation of GRB031027 (small error box)
  17. Lulin optical follow-up observations of GRB031026
  18. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  19. GRB031026 : KISO optical follow-up observation
  20. IPN triangulation of GRB030926 (short/hard; large error box)
  21. IPN triangulation of GRB030922A (large error box)
  22. IPN triangulation of GRB030919 (large error box)
  23. IPN triangulation of GRB030916 (possible short/hard GRB; large error box)
  24. IBAS detection of bursts from SGR 1806-20
  25. IPN triangulation of GRB030801 (large error box)
  26. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  27. IPN triangulation of GRB030714 (two large error boxes)
  28. GRB030329: second XMM-Newton observation
  29. GRB030329 -- RATAN-600 data in April-May
  30. IPN triangulation of GRB030606 (two alternate error boxes)
  31. GRB 030329: optical observations
  32. GRB 030329/SN 2003dh: Jitter Episode
  33. GRB 030528 Bisei optical observation
  34. GRB030528 (H2724): A long GRB localized by HETE
  35. GRB 030528: Optical observations at RIKEN
  36. GRB 030329: optical photometry at Belesta observatory (France)
  37. GRB030329, Optical observations
  38. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  39. GRB030425: CrAO optical observation
  40. GRB 030329, the review of the sky area in plate archive (1950-1998)
  41. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  42. IPN triangulation of GRB030422 (two large error boxes)
  43. GRB030418: Upper limits from recent and historical observations.
  44. OT GRB 030329: early UBVRcIc spectral evolution
  45. OT GRB 030329: early spectrum
  46. GRB030329: VR Photometry at TNG
  47. GRB030328: R upper limit after 6 hours by MASTER
  48. GRB 030329: SARA Optical Observations
  49. GRB 030329, nearby galaxies
  50. GRB030329: final R-band light curve by MASTER
  51. GRB030329 - more 15 GHz radio data
  52. GRB 030329: SARA Optical Observations
  53. GRB 030329, BRI photometry
  54. GRB 030329: Additional Mt. Laguna Optical Observations
  55. AAVSO V & R observations of GRB030329
  56. GRB 030329: optical observations
  57. GRB 030329: Optical pre-Imaging
  58. GRB030328: R optical observation
  59. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  60. RXTE detection of GRB 030329 afterglow
  61. GRB 030328: Optical observations
  62. GRB 030328: OT photometry
  63. GRB030328: optical spectroscopy at TNG
  64. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  65. GRB 030328: Optical afterglow candidate
  66. GRB030323 optical observations
  67. GRB030131, BVRcIc field photometry
  68. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  69. GRB030323, optical observations
  70. 030228: NOT A GRB
  71. GRB030227:Optical observations
  72. GRB 030131: marginal optical detection
  73. GRB030131: Candidate Optical Afterglow
  74. GRB 030131: afterglow candidate
  75. IPN triangulation of GRB030119 (two large error boxes)
  76. IPN triangulation of GRB030115C (large error box)
  77. IPN triangulation of GRB021219 - CORRECTION
  78. Chandra observation of the IPN error box of GRB021201 (short/hard)
  79. GRB 021201: BOOTES simultaneous optical observations
  80. GRB021125 refined position
  81. Improved IPN error box for GRB021125
  82. IPN BURST POSITION
  83. IPN triangulation of GRB021125 (INTEGRAL BURST)
  84. GRB021112 (=H2448): A Long GRB Localized by HETE
  85. IPN triangulation of GRB021020 (smaller error box)
  86. IPN triangulation of GRB021013 (single error box)
  87. IPN triangulation of GRB021013 (two small error boxes)
  88. GRB021004: BVRc photometry
  89. GRB021004, Optical Observations
  90. GRB 021004: Optical Photometry at 1.5 Days
  91. GRB 021004: Optical Observations
  92. GRB 021004, SPM optical observations
  93. GRB 020812: optical observation at Bisei
  94. IPN triangulation of GRB020813
  95. GRB 020812 optical observation
  96. IPN triangulation of GRB020708
  97. GRB 020625, optical observations
  98. GRB 020531: optical photometry of Chandra sources
  99. GRB020625 (=H2081): A Long Burst Localized by HETE
  100. GRB 020604, optical observations

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