GCN Circulars Archive

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1. The Latest Circulars
2. Older Circulars
3. Tarfile of all Circulars
4. Bursts of Special Interest

This is the archive of the GCN Observation Report Circulars.

To learn more about the GCN Circulars and how to subscribe.

(Listed in reverse serial number order -- newest first)

• 12918 GRB 111228A, the review of the sky area in plate archives
  
• 12917 GRB 120202A: MASTER early optical observations
  
• 12916 LS I +61 303: Swift-BAT refined analysis
  
• 12915 GRB 120202A: D50 optical limits
  
• 12914 Swift detection of a burst from LS I +61 303
  
• 12913 GRB 120202A: GROND observations
  
• 12912 GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  
• 12911 GRB 120202A: Swift/XRT and UVOT observations
  
• 12910 GRB 120202A: TAROT Calern observatory optical observations
  
• 12909 GRB 120202A: A long GRB detected by INTEGRAL
  
• 12908 GRB 111228A: Possible host detected by Swift/UVOT
  
• 12907 GRB 120129A: MASTER optical observations
  
• 12906 GRB 120116A, the review of the sky area in plate archives
  
• 12905 Konus-Wind observation of GRB 120129A
  
• 12904 IPN Triangulation of GRB 120129A (long/intense)
  
• 12903 GRB 120127A / P48 Imaging
  
• 12902 GRB 120127A: MASTER optical observations
  
• 12901 GRB 120127A: MAXI/GSC detection of a probable GRB
  
• 12900 GRB 120118B: optical upper limit
  
• 12899 GRB 120116A: optical upper limit
  
• 12898 GRB 120119A : LOAO Optical Observations
  
• 12897 GRB 120119A : SMA submm follow-up observation
  
• 12896 Fermi GBM trigger 120123.169 is not a GRB
  
• 12895 GRB 120119A: EVLA observations
  
• 12894 GRB 120119A: GRT detection of early afterglow
  
• 12893 GRB 111225A: optical observations
  
• 12892 GRB 120119A: optical upper limit
  
• 12891 GRB 120121A: Swift/UVOT Upper Limits
  
• 12890 GRB 120121A: Swift-XRT refined Analysis
  
• 12889 GRB 120121A: Swift-BAT refined analysis
  
• 12888 GRB 120121A: Enhanced Swift-XRT position
  
• 12887 GRB 120121A: ISON-NM optical observations
  
• 12886 GRB 120121A: Swift-XRT position
  
• 12885 GRB 120121A: Swift detection of a burst
  
• 12884 GRB 120119A: Swift-BAT refined analysis
  
• 12883 GRB 120119A: TAROT La Silla observatory optical observations
  
• 12882 GRB 120119A: REM NIR observations
  
• 12881 GRB 120119A: optical observations
  
• 12880 GRB 120119A: Swift/UVOT Observations
  
• 12879 GRB 120118B: RTT150 optical observations
  
• 12878 GRB 120119A: SMARTS optical/IR afterglow observations
  
• 12877 GRB 120119A: Swift-XRT refined Analysis
  
• 12876 GRB 120119A: Enhanced Swift-XRT position
  
• 12875 GRB 120102A, the review of the sky area in plate archive
  
• 12874 GRB 120119A: Fermi GBM observation
  
• 12873 GRB 120118B, Swift-BAT refined analysis
  
• 12872 Konus-Wind observation of GRB 120119A
  
• 12871 GRB 120119A: optical observations
  
• 12870 GRB 120118B: TNG NIR observations
  
• 12869 GRB 120118B: Swift-XRT refined Analysis
  
• 12868 GRB 120118B: Lulin Optical limit
  
• 12867 GRB 120119A: MMT redshift confirmation
  
• 12866 GRB 120119A: Lick 3m Spectroscopy
  
• 12865 GRB 120119A: Gemini-S redshift
  
• 12864 GRB 120119A: PROMPT optical observation of early afterglow
  
• 12863 GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  
• 12862 GRB 120118B: Swift/UVOT Upper Limits
  
• 12861 GRB 120119A: Liverpool Telescope afterglow detection
  
• 12860 GRB 120119A: PAIRITEL NIR Detection
  
• 12859 GRB 120119A: Swift detection of a burst with an optical counterpart
  
• 12858 GRB 120118B: NOT observations
  
• 12857 GRB 120118B: Enhanced Swift-XRT position
  
• 12856 GRB 120118B: Faulkes Telescope South observations
  
• 12855 XRF 120118A: early optical limit by "Pi of the Sky"
  
• 12854 GRB 120118B: Swift-XRT position
  
• 12853 GRB 120118B: MASTER optical observations
  
• 12852 GRB 120118B: Swift detection of a burst
  
• 12851 XRF 120118A: Optical candidate
  
• 12850 XRF 120118A: further INTEGRAL analysis
  
• 12849 XRF 120118A: an X-Ray Flash detected by INTEGRAL
  
• 12848 GRB 120116A: Swift/UVOT Upper Limits
  
• 12847 GRB 120116A: Swift-XRT refined Analysis
  
• 12846 GRB 120116A: Enhanced Swift-XRT position
  
• 12845 AXP 4U 1042+61: Mondy optical observations
  
• 12844 GRB 120116A: Mondy optical observations
  
• 12843 GRB 120116A: Gemini optical/IR candidate
  
• 12842 GRB 120116A: EVLA observations
  
• 12841 GRB 120116A: WHT optical observations
  
• 12840 GRB 120116A: Optical observations at Crni Vrh
  
• 12839 GRB 120116A: Swift-BAT refined analysis
  
• 12838 GRB 120116A: NOT observations
  
• 12837 GRB 120116A: IAC80 I-band observations
  
• 12836 GRB 120116A: Bassano Bresciano Observatory optical observations
  
• 12835 GRB 120116A: MASTER Early optical limit
  
• 12834 GRB 120116A: Swift detection of a burst
  
• 12833 GRB 120114A found in ground analysis of BAT data
  
• 12832 GRB 111228A: optical observations
  
• 12831 AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  
• 12830 GRB 120106A: optical upper limit
  
• 12829 Swift detection of an SGR burst from AXP 4U 0142+61
  
• 12828 GRB 120107A: Suzaku WAM observation of the prompt emission
  
• 12827 GRB 110915B, the review of the sky area in plate archives
  
• 12826 GRB 120107A: Fermi GBM observation
  
• 12825 GRB 120106A: MITSuME Okayama Optical Observation (update)
  
• 12824 Konus-Wind observation of GRB 120107A
  
• 12823 IPN Triangulation of GRB 120107A
  
• 12822 GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  
• 12821 GRB 120106A: Swift/UVOT Upper Limits
  
• 12820 GRB 120106A: Bassano Bresciano Observatory optical observations
  
• 12819 GRB 120106A: MITSuME Okayama Ks-band upper limit
  
• 12818 GRB 120106A: MASTER yearly Early OT marginally detection
  
• 12817 GRB 120106A: Swift-XRT refined Analysis
  
• 12816 INTEGRAL Weak trigger #6433: GRT Optical Observation
  
• 12815 GRB 120106A: Swift-BAT refined analysis
  
• 12814 GRB 120106A: MITSuME Okayama Optical upper limits
  
• 12813 GRB 120106A: Enhanced Swift-XRT position
  
• 12812 GRB 120106A: TAROT Calern observatory optical observations
  
• 12811 GRB 120106A: MASTER-Tunka optical observations
  
• 12810 GRB 120106A: Swift detection of a burst
  
• 12809 GRB 111228A :LOAO R-band Observations
  
• 12808 GRB 111225A, the review of the sky area in plate archives
  
• 12807 GRB 111222A, the review of the sky area in plate archives
  
• 12806 GRB 111222A: Fermi GBM observations
  
• 12805 GRB 111222A: Second Swift observation
  
• 12804 GRB 111209A: ATCA detection at 5.5, 9, and 18GHz
  
• 12803 GRB 111225A: RAPTOR Early Detection of the Optical Counterpart
  
• 12802 GRB 111211A: Detection of the SN with the 10.4m GTC
  
• 12801 GRB 120102A: Fermi GBM observation
  
• 12800 Konus-Wind observation of GRB 120102A
  
• 12799 GRB 120102A: Swift-BAT refined analysis
  
• 12798 GRB 111228A: optical observations in CrAO
  
• 12797 GRB 120102A: Swift-XRT refined Analysis
  
• 12796 GRB 120102A: Swift/UVOT Detection
  
• 12795 GRB 120102A: Enhanced Swift-XRT position
  
• 12794 GRB 120102A: Swift detection of a burst with an optical counterpart
  
• 12793 GRB 111225A: optical observations in CrAO
  
• 12792 GRB 111228A, optical observations
  
• 12791 GRB 111228A: LOAO Optical Observation
  
• 12790 Konus-Wind observation of GRB 111228A
  
• 12789 GRB 111228A: MASTER-Net optical photometry
  
• 12788 GRB 111228A: correction for GCN 12787
  
• 12787 GRB 111228A: Optical and NIR observations with Kanata telescope
  
• 12786 GRB 110915A, the review of the sky area in plate archives
  
• 12785 GRB 111228A: correction to GCN 12784
  
• 12784 GRB 111228A: SMARTS optical/IR afterglow observations
  
• 12783 GRB 111229A: Swift/UVOT Detection
  
• 12782 GRB 111229A: Faulkes Telescope South observations
  
• 12781 GRB 111229A: Swift-XRT refined Analysis
  
• 12780 GRB 111229A: Enhanced Swift-XRT position
  
• 12779 GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  
• 12778 GRB 111228A: Further GMG observations
  
• 12777 GRB 111229A: Gemini-South Redshift
  
• 12776 GRB 111229A: Swift-BAT refined analysis
  
• 12775 GRB 111229A: GROND afterglow candidate
  
• 12774 GRB 111229A: Swift detection of a burst
  
• 12773 GRB 111228A: Liverpool Telescope Observations
  
• 12772 GRB 111225A: Lightbuckets Optical Observations
  
• 12771 GRB 111228A: P60 Observations
  
• 12770 GRB 111228A: X-shooter spectroscopy
  
• 12769 GRB 111228A: T100 observations
  
• 12768 GRB 111228A: MITSuME Akeno photometry of the optical afterglow
  
• 12767 GRB 111228A: GMG optical observation
  
• 12766 GRB 111228A: Swift-XRT refined Analysis
  
• 12765 Duplicate removed
  
• 12764 GRB 111228A: NOT redshift
  
• 12763 GRB 111228A: TNG spectroscopy analysis
  
• 12762 FERMI GRB111228.45: MASTER observations
  
• 12761 GRB 111228A: Gemini South Redshift
  
• 12760 GRB 111228A: PAIRITEL NIR Detection
  
• 12759 GRB 111228A: MMT Redshift
  
• 12758 GRB 111228A: TAROT La Silla observatory observations
  
• 12757 GRB 111228A: GROND observations
  
• 12756 GRB 111228A: MASTER OT observations
  
• 12755 GRB 111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  
• 12754 GRB 111228A: GRAS017 optical observations
  
• 12753 GRB 111228A: IAC80 BVI-band observations
  
• 12752 GRB 111228A: Swift/UVOT Detection
  
• 12751 GRB 111228A: Skynet/Dolomiti Optical Observations
  
• 12750 GRB 111228A: NOT optical observation
  
• 12749 GRB 111228A, Swift-BAT refined analysis
  
• 12748 GRB 111228A: optical observations
  
• 12747 GRB 111228A: Enhanced Swift-XRT position
  
• 12746 GRB 111228A: TAROT Calern observatory. OT decay stopped
  
• 12745 GRB 111228A, optical observations
  
• 12744 GRB 111228A: Fermi GBM observation
  
• 12743 GRB 111228A: MITSuME Okayama Optical Observation
  
• 12742 GRB 111228A: TAROT Calern observatory. OT seems still bright
  
• 12741 GRB 111228A: Possible host galaxy in the SDSS arhive
  
• 12740 GRB 111225A, optical observations
  
• 12739 XMM-Newton observation of the short GRB 111020A
  
• 12738 GRB 111228A: Xinglong TNT confirms the optical afterglow
  
• 12737 GRB 111228A: Swift detection of a burst with an optical counterpart
  
• 12736 GRB 111205A: optical observations
  
• 12735 GRB 111225A: Swift/UVOT Observations
  
• 12734 GRB 111215A: Keck/LRIS Imaging
  
• 12733 GRB 111225A: Keck/LRIS Afterglow Photometry
  
• 12732 GRB 111222A: Suzaku WAM observation of the prompt emission
  
• 12731 GRB 111225A: PAIRITEL NIR Upper Limits
  
• 12730 GRB 111225A: MITSuME Okayama optical upper limits
  
• 12729 GRB 111225A: GRT Optical Observation
  
• 12728 GRB 111225A: 1.23m CAHA optical observations
  
• 12727 GRB 111225A: Swift-XRT refined Analysis
  
• 12726 GRB 111225A: Swift-BAT refined analysis
  
• 12725 GRB 111225A: Xinglong TNT optical afterglow
  
• 12724 GRB 111225A: Enhanced Swift-XRT position
  
• 12723 GRB 111225A: Super-LOTIS early detection
  
• 12722 GRB 111225A: TAROT Calern observatory optical detection
  
• 12721 GRB 111225A: TAROT Calern observatory optical observations
  
• 12720 GRB 111225A: Swift detection of a burst with an optical counterpart
  
• 12719 GRB 111222A: GMG optical observation
  
• 12718 GRB 111222A: Xinglong TNT observation
  
• 12717 GRB 111222A: Swift/UVOT Observations
  
• 12716 GRB 111222A: Swift-XRT observations
  
• 12715 Konus-Wind observation of GRB 111222A
  
• 12714 IPN Triangulation of GRB 111222A (short/hard/intense)
  
• 12713 GRB 111210A: optical upper limit of Mt. Terskol observatory
  
• 12712 Trigger 510075 is not a GRB
  
• 12711 GRB 111215A: EVLA observations
  
• 12710 GRB 111215A: CARMA Detection
  
• 12709 XRT GRB Catalogue now live and online
  
• 12708 GRB 111103B: optical upper limit
  
• 12707 GRB 110820A: optical observations in Maidanak observatory
  
• 12706 GRB 111103A: optical upper limit of Mt. Terskol observatory
  
• 12705 GRB 111215B: Suzaku WAM observation of the prompt emission
  
• 12704 GRB 111211A: optical ovservations at Mt. Terskol observatory
  
• 12703 GRB 111215A: optical upper limit
  
• 12702 GRB 111215B: Swift/UVOT Upper Limits
  
• 12701 Konus-Wind observation of GRB 111215B
  
• 12700 GRB 111215B: Swift-XRT observations
  
• 12699 GRB 111205A: Confirmation of X-ray Afterglow
  
• 12698 IPN Triangulation of GRB 111215B (long/intense)
  
• 12697 GRB 111215A: Pre-Outburst Palomar 48 inch Imaging
  
• 12696 GRB 111215A: WHT, LT and NOT imaging
  
• 12695 GRB 111215A: TNG K-band observations
  
• 12694 GRB 111215A: MITSuME Okayama Optical upper limits
  
• 12693 GRB 111215A: Swift/UVOT Upper Limits
  
• 12692 GRB 111215A: Swift-XRT refined Analysis
  
• 12691 Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  
• 12690 GRB 111215A: Enhanced Swift-XRT position
  
• 12689 GRB 111215A: Swift-BAT refined analysis
  
• 12688 GRB 111215A: OSN I-band observations
  
• 12687 GRB 111215A: MASTER-Net optical prompt and follow up observations
  
• 12686 GRB 111215A, Optical Observations
  
• 12685 GRB 111215A: MITSuME Akeno Optical upper limits
  
• 12684 GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  
• 12683 GRB 111215A: GMG optical upper limit
  
• 12682 GRB 111215A : Xinglong TNT upper limit
  
• 12681 GRB 111215A: Swift detection of a burst
  
• 12680 GRB 111201A, the review of the sky area in plate archive
  
• 12679 GRB 111212A: GROND observations
  
• 12678 GRB 111211A: Swift/UVOT Detection
  
• 12677 GRB 111211A: VLT/X-shooter redshift
  
• 12676 Konus-Wind observation of GRB 111211A
  
• 12675 GRB 111211A: NOT afterglow confirmation
  
• 12674 GRB 111212A: Swift-XRT refined Analysis
  
• 12673 GRB 111211A: Swift/XRT target of opportunity observation
  
• 12672 GRB 111212A: Swift/UVOT Upper Limits
  
• 12671 GRB 111212A: Swift-BAT refined analysis
  
• 12670 GRB 111212A: Enhanced Swift-XRT position
  
• 12669 GRB 111212A: Swift-XRT observations
  
• 12668 GRB 111211A: GROND afterglow candidate
  
• 12667 GRB 111212A: Swift detection of a burst
  
• 12666 GRB 111211A: SuperAGILE localization of a long GRB
  
• 12665 GRB 111210A: Xinglong TNT upper limit
  
• 12664 GRB 111209A - ATCA 34GHz upper limit
  
• 12663 Konus-Wind observation of GRB 111209A
  
• 12662 GRB 111210A: GROND observations
  
• 12661 GRB 111210A: SDSS prior imaging
  
• 12660 GRB 111210A: Swift-XRT refined Analysis
  
• 12659 GRB 111210A: MITSuME Okayama Optical upper limits
  
• 12658 GRB 111208A: Swift-XRT refined analysis
  
• 12657 GRB 111210A: Gemini-North candidate counterpart
  
• 12656 GRB 111209A: Rebrightening seen by GROND
  
• 12655 GRB 111210A: MITSuME Okayama J-band upper-limit
  
• 12654 GRB 111210A: Swift/UVOT Upper Limits
  
• 12653 GRB 111210A: Spectral lag analysis
  
• 12652 GRB 111210A: Enhanced Swift-XRT position
  
• 12651 GRB 111210A: Swift-BAT refined analysis
  
• 12650 GRB 111210A: Swift detection of a burst
  
• 12649 GRB 111209A: IRTF NIR Imaging/Spectroscopy
  
• 12648 GRB 111209A: VLT/X-shooter redshift
  
• 12647 GRB 111209A: GROND Afterglow observations
  
• 12646 GRB 111209A optical limit by "Pi of the Sky"
  
• 12645 GRB 111209A: PROMPT optical observations of early afterglow
  
• 12644 GRB 111208A: Lightbuckets Optical Observations
  
• 12643 GRB 111209A: Swift-XRT refined Analysis
  
• 12642 GRB 111209A: Swift UVOT refined analysis
  
• 12641 GRB 111209A: Swift Burst of Interest
  
• 12640 GRB 111209A, Swift-BAT refined analysis
  
• 12639 GRB 111209A: Enhanced Swift-XRT position
  
• 12638 GRB 111209A: planned XMM-Newton observation
  
• 12637 GRB 111209A: TAROT La Silla observatory optical light curve analysis
  
• 12636 GRB 111205A: GROND observations
  
• 12635 GRB 111209A: Faulkes Telescope North observations
  
• 12634 GRB 111209A: REM NIR detection
  
• 12633 GRB 111209A: TAROT La Silla observatory optical detection
  
• 12632 GRB 111209A: Swift detection of a long burst with an optical counterpart
  
• 12631 GRB 111208A: Swift XRT/UVOT observations
  
• 12630 GRB 111205A: Swift XRT Observations
  
• 12629 GRB 111207A found in ground analysis of BAT data
  
• 12628 GRB 111208A found in ground analysis of BAT data
  
• 12627 Konus-Wind observation of GRB 111205A
  
• 12626 IPN Triangulation of GRB 111205A (long/hard/intense)
  
• 12625 GRB 111117A: Refined GMG observation
  
• 12624 GRB 111204A: TNG NIR observations
  
• 12623 GRB 111201A: GMG optical observation
  
• 12622 GRB 111204A: GROND Observations
  
• 12621 GRB 111204A: Swift-XRT refined Analysis
  
• 12620 GRB 111204A, Swift-BAT refined analysis
  
• 12619 GRB 111022B: CrAO optical limit
  
• 12618 GRB 111204A: Swift/UVOT Upper Limits
  
• 12617 GRB 110921A: optical observations in Maidanak observatory
  
• 12616 GRB 111204A: MASTER optical observations
  
• 12615 GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  
• 12614 GRB 111204A: Enhanced Swift-XRT position
  
• 12613 GRB 111123A: optical upper limit in CrAO
  
• 12612 GRB 111204A: Swift detection of a burst
  
• 12611 GRB 111201A: Confirmation of the X-ray afterglow
  
• 12610 GRB 111201A: Swift/UVOT Upper Limits
  
• 12609 GRB 111201A: Swift-XRT observations
  
• 12608 GRB 111201A found in ground analysis of BAT data
  
• 12607 GRB 111121A: Suzaku WAM observation of the prompt emission
  
• 12606 GRB 111129A: Swift/UVOT Detection
  
• 12605 GRB 111129A, GROND afterglow observations
  
• 12604 GRB 111129A: Swift-XRT refined Analysis
  
• 12603 GRB 111126A Circular #12599 erratum
  
• 12602 GRB 111129A: Swift-BAT refined analysis
  
• 12601 GRB 111129A: Enhanced Swift-XRT position
  
• 12600 GRB 111129A: Swift detection of a burst with an optical counterpart
  
• 12599 GRB 111126A found in ground analysis of BAT data
  
• 12598 GRB 111123A, Swift-BAT refined analysis
  
• 12597 GRB 111123A: Swift/UVOT Upper Limits
  
• 12596 GRB 111123A - NOT optical observations
  
• 12595 GRB 111123A, GROND observations
  
• 12594 GRB 111123A: correction to GCN 12593
  
• 12593 GRB 111123A: TNG NIR detection of the afterglow candidate
  
• 12592 GRB 111123A: Swift-XRT refined Analysis
  
• 12591 GRB 111123A: MITSuME Okayama Optical upper limits
  
• 12590 GRB 111123A: Enhanced Swift-XRT position
  
• 12589 GRB 111123A: GMG optical observation
  
• 12588 GRB 111117A: Refined Chandra Astrometry
  
• 12587 GRB 111123A: Swift detection of a burst
  
• 12586 GRB 111117A, the review of the sky area in plate archives
  
• 12585 Konus-Wind observation of GRB 111121A
  
• 12584 GRB 111121A: Swift/UVOT Upper Limits
  
• 12583 GRB 111121A: Magellan/Megacam observations
  
• 12582 GRB 111121A: Swift-XRT refined Analysis
  
• 12581 GRB 111121A: Swift-BAT refined analysis
  
• 12580 GRB 111117A: Chandra detection of the afterglow
  
• 12579 GRB 111121A: Enhanced Swift-XRT position
  
• 12578 GRB 111121A: Swift detection of a short hard burst
  
• 12577 GRB 111117A: Gemini Afterglow Limits
  
• 12576 GRB 111117A: optical upper limit in CrAO
  
• 12575 Duplicate removed
  
• 12574 Duplicate removed
  
• 12573 GRB 111117A: Fermi GBM observation
  
• 12572 GRB 111117A: further NOT observations
  
• 12571 GRB 111117A: EVLA observations
  
• 12570 GRB 111117A: TNG observations
  
• 12569 GRB 111117A: Swift/UVOT Upper Limits
  
• 12568 GRB 111117A: GROND observations
  
• 12567 GRB 111117A: Gemini host observation
  
• 12566 GRB 111117A: Magellan IMACS observations
  
• 12565 GRB 111117A: Swift-XRT refined Analysis
  
• 12564 GRB 111107A: Further ATCA observations - no detection
  
• 12563 GRB 111117A: NOT observations
  
• 12562 GRB 111117A: Chandra ToO observation scheduled
  
• 12561 GRB 111117A: Swift-BAT refined analysis of a short hard burst
  
• 12560 GRB 111117A: GMG upper limit
  
• 12559 GRB 111117A: Swift detection of a short hard burst
  
• 12558 GRB 111107A: ATCA observations - upper limit and a possible detection
  
• 12557 Konus-Wind observation of GRB 111113A
  
• 12556 IPN Triangulation of GRB 111113A (short/hard/intense)
  
• 12555 XRF 111111A/MAXI J0158-744: MAXI GSC refined analysis
  
• 12554 XRF 111111A/MAXI J0158-744: MAXI GSC and SSC detection of a soft X-ray transient near SMC
  
• 12553 GRB 111109A: Swift-XRT refined Analysis
  
• 12552 GRB 111109A: Swift/UVOT Photometry
  
• 12551 GRB 111109A: Swift-BAT refined analysis
  
• 12550 GRB 111109A: Enhanced Swift-XRT position
  
• 12549 GRB 111109A: Swift-XRT observations
  
• 12548 GRB 111109A: Swift detection of a burst
  
• 12547 GRB 111103B: optical upper limit of CrAO
  
• 12546 GRB 111103B: optical upper limit of Mt. Terskol observatory
  
• 12545 GRB 111107A: Fermi GBM observation
  
• 12544 Continued Skynet observations of GRB111107A
  
• 12543 GRB 111107A: Swift-XRT refined Analysis
  
• 12542 GRB 111107A: VLT/X-shooter spectroscopy
  
• 12541 GRB 111107A: APEX submm observation
  
• 12540 GRB 111107A: Swift/UVOT Afterglow Analysis
  
• 12539 GRB 111107A: Swift-BAT refined analysis
  
• 12538 GRB 111107A: Enhanced Swift-XRT position
  
• 12537 GRB 111107A: Gemini-South Redshift
  
• 12536 GRB 111107A: GROND observations
  
• 12535 Skynet observations of GRB 111107A
  
• 12534 GRB 111107A: Swift detection of a burst with an optical counterpart
  
• 12533 GRB 111103B: MITSuME Akeno Optical upper limits
  
• 12532 Konus-Wind observation of GRB 111103B
  
• 12531 GRB 111103B : WIYN 3.5m NIR observations
  
• 12530 GRB 111103B: Swift-XRT refined Analysis
  
• 12529 GRB 111103A: Fermi GBM observation
  
• 12528 GRB 111103B Swift/UVOT Upper Limits
  
• 12527 GRB 111103B: optical observations from TAU, Ka-Dar
  
• 12526 Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  
• 12525 GRB 111103B: Enhanced Swift-XRT position
  
• 12524 GRB 111103B: Swift-BAT refined analysis
  
• 12523 GRB 111103A: Swift-BAT refined analysis
  
• 12522 Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  
• 12521 GRB 111022B: MASTER OT observations
  
• 12520 GRB 111103B: optical observations
  
• 12519 GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  
• 12518 GRB 111103A: Swift detection of a burst
  
• 12517 Swift-BAT trigger 506884 is not a GRB
  
• 12516 GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  
• 12515 GRB 111029A: SAO RAS optical limits
  
• 12514 GRB 111029A: Super-LOTIS early limits
  
• 12513 All GCN Circulars available in a tarfile for data mining
  
• 12512 GRB 111026A: spectral lag value inconclusive for a short burst
  
• 12511 GRB 111029A: MITSuME Ishigakijima Optical Upper Limits
  
• 12510 GRB 111029A: TNT optical upper limit, Correction to GCN 12503
  
• 12509 GRB 111029A: Swift-XRT refined Analysis
  
• 12508 GRB 111029A: PAIRITEL NIR Upper Limits
  
• 12507 GRB 111026A: Swift-BAT refined analysis
  
• 12506 GRB 111029A: Swift/UVOT Upper Limits
  
• 12505 GRB 111029A: KAIT optical limits
  
• 12504 GRB 111029A: Swift-BAT refined analysis
  
• 12503 GRB 110929A: TNT optical upper limit
  
• 12502 GRB 111029A: Enhanced Swift-XRT position
  
• 12501 GRB 111029A: Faulkes Telescope North observations
  
• 12500 GRB 111029A: optical upper limit
  
• 12499 GRB 111029A: ROTSE-III Optical Limits
  
• 12498 GRB 111029A: Swift detection of a burst
  
• 12497 GRB 111026A: Swift detection of a burst
  
• 12496 GRB 111022B: EVLA observations - correction to GCN 12495
  
• 12495 GRB 111022B: EVLA observations
  
• 12494 GRB 111022B: 10.4m GTC z'-band observations
  
• 12493 GRB 111022B: D50 optical limit
  
• 12492 GRB 111020A: Chandra Observation
  
• 12491 GRB 111022B: BTA Optical Observations
  
• 12490 GRB 111022A: MITSuME Akeno Optical upper limits
  
• 12489 GRB 111024A: MAXI/GSC detection of a burst
  
• 12488 GRB 111022B: Swift/UVOT upper limits
  
• 12487 GRB 111022A: Swift/UVOT Upper Limits
  
• 12486 GRB 111016A: optical upper limit
  
• 12485 GRB 111022B, Swift-BAT refined analysis
  
• 12484 GRB 111022B: Swift-XRT refined Analysis
  
• 12483 GRB 111022A: RIzY Observation
  
• 12482 GRB 111022A: Swift-XRT refined Analysis
  
• 12481 GRB 111022B: Gemini infrared observations
  
• 12480 GRB 111022B: MITSuME Akeno Optical upper limits
  
• 12479 GRB 111022B: NOT observations
  
• 12478 GRB 111022B: Enhanced Swift-XRT position
  
• 12477 GRB 111020A: Spectral lag analysis
  
• 12476 GRB 111022A: Swift-BAT refined analysis
  
• 12475 GRB 111022B: MASTER-Net early limit
  
• 12474 GRB 111022A: Preliminary UVOT TDRSS Non-Detection
  
• 12473 GRB 111022A: MASTER-Net early limit
  
• 12472 GRB 111022B: Swift detection of a burst
  
• 12471 GRB 111022A: Swift detection of a burst
  
• 12470 GRB 111020A: Gemini-South additional observations and limit on an optical afterglow
  
• 12469 GRB 111020A: EVLA observations
  
• 12468 GRB 111020A: Swift-XRT refined Analysis
  
• 12467 GRB 111020A: Gemini-South i-band observations
  
• 12466 GRB 111020A: Swift/UVOT Upper Limits
  
• 12465 GRB 111020A: Faulkes Telescope South observations
  
• 12464 GRB 111020A: Swift-BAT refined analysis
  
• 12463 GRB 111020A: Enhanced Swift-XRT position
  
• 12462 GRB 111020A: BOOTES-3 Optical Upper Limit.
  
• 12461 GRB 111020A: Planned XMM-Newton observation
  
• 12460 GRB 111020A: Swift detection of a short burst
  
• 12459 GRB 111018A: Swift/UVOT Upper Limits
  
• 12458 GRB 110918A: Optical light curve for days 1.4 to 16.3
  
• 12457 GRB 111018A: Swift-BAT refined analysis
  
• 12456 Konus-Wind observation of GRB 111016B
  
• 12455 GRB 111018A: Swift-XRT refined Analysis
  
• 12454 GRB 111018A: GROND Upper Limits
  
• 12453 GRB 111018A: Enhanced Swift-XRT position
  
• 12452 IPN Triangulation of GRB 111016B (long duration, intense)
  
• 12451 GRB 111016A: WIYN 3.5m NIR observations
  
• 12450 GRB 111018A: Swift detection of a burst
  
• 12449 GRB 111017A: Fermi GBM Detection
  
• 12448 GRB 111016A: D50 optical limit
  
• 12447 GRB 111016A: Gemini Detection of the NIR Counterpart
  
• 12446 GRB 111016A: Swift/UVOT Detection of a Source
  
• 12445 GRB 111016A: Swift-BAT refined analysis
  
• 12444 GRB 111016A: P60 Afterglow Candidate
  
• 12443 GRB 111016A: MITSuME Akeno Optical upper limits
  
• 12442 GRB 111016A: Swift-XRT refined Analysis
  
• 12441 GRB 111016A: Enhanced Swift-XRT position
  
• 12440 GRB 111016A: Swift-XRT observations
  
• 12439 GRB 111016A: Swift detection of a burst
  
• 12438 GRB 110921A: optical observations
  
• 12437 GRB 111008A : miniTAO/ANIR NIR observations
  
• 12436 EVLA 22 GHz Detection of GRB 111008A
  
• 12435 GRB 111005A: ATCA 18 GHz decay
  
• 12434 GRB 111008A: Swift/UVOT Upper Limits
  
• 12433 Konus-Wind observation of GRB 111008A
  
• 12432 GRB 111008A: IAC80 I-band observations
  
• 12431 GRB 111008A: VLT/X-shooter spectroscopy
  
• 12430 GRB 111008A: Swift-XRT refined Analysis
  
• 12429 GRB 111008A: Gemini spectroscopic redshift
  
• 12428 GRB 111008A: GROND observations
  
• 12427 GRB 111008A: NOT optical observation
  
• 12426 GRB 111008A: Gemini optical counterpart
  
• 12425 GRB 111008A: Enhanced Swift-XRT position
  
• 12424 GRB 111008A: Swift-BAT refined analysis
  
• 12423 GRB 111008A: Swift detection of a burst
  
• 12422 GRB 111005A: ATCA 18 GHz detection
  
• 12421 GRB 111005A: ATCA radio upper limit
  
• 12420 GRB 111005A: miniTAO/ANIR NIR observations
  
• 12419 GRB 111005A: EVLA Observations
  
• 12418 GRB 111005A: VLT optical observations
  
• 12417 GRB 111005A: GROND NIR observations
  
• 12416 GRB 111005A: VLT IR observations
  
• 12415 GRB 111005A: Swift-BAT refined analysis
  
• 12414 GRB 111005A: bright galaxy in error circle
  
• 12413 GRB 111005A: Swift detection of a burst
  
• 12412 GRB 111003A: Fermi GBM detection
  
• 12411 GRB 110905A / MAXI J1836-194: optical monitoring
  
• 12410 GRB 110921A: MITSuME-Akeno Optical photometry
  
• 12409 Skynet/Dolomiti observations of GRB 110928A
  
• 12408 Skynet observations of GRB 110928A
  
• 12407 GRB 110928A: RAPTOR Limits During Gamma-ray Emitting Interval
  
• 12406 GRB 110928A: Swift/UVOT Upper Limits
  
• 12405 Trigger 504307: Swift detection of MAXI J1836-194
  
• 12404 GRB 110928A: Swift-XRT refined Analysis
  
• 12403 GRB 110825A: GROND Observations
  
• 12402 GRB 110928A: Enhanced Swift-XRT position
  
• 12401 GRB 110928A: P60 Observations
  
• 12400 GRB 110928A: Further PAIRITEL NIR Observations
  

After a while the above list gets too large and then the older entries are moved to the following lists.

Current Circulars 11600-present   11-01-25 to present
Circulars 12300-12399   11-08-23 to 11-09-28
Circulars 12200-12299   11-07-26 to 11-08-22
Circulars 12100-12199   11-06-27 to 11-07-26
Circulars 12000-12099   11-05-04 to 11-06-27
Circulars 11900-11999   11-04-07 to 11-05-04
Circulars 11800-11899   11-03-18 to 11-04-07
Circulars 11700-11799   11-02-12 to 11-03-18
Circulars 11600-11699   11-01-25 to 11-02-12
Circulars 11500-11599   10-12-26 to 11-01-24
Circulars 11400-11499   10-11-13 to 10-12-26
Circulars 11300-11399   10-09-25 to 10-11-13
Circulars 11200-11299   10-09-03 to 10-09-25
Circulars 11100-11199   10-08-15 to 10-09-03
Circulars 11000-11099   10-07-27 to 10-08-15
Circulars 10900-10999   10-06-28 to 10-07-27
Circulars 10800-10899   10-05-26 to 10-06-28
Circulars 10700-10799   10-04-28 to 10-05-26
Circulars 10600-10699   10-04-15 to 10-04-28
Circulars 10500-10599   10-03-16 to 10-04-15
Circulars 10400-10499   10-02-11 to 10-03-16
Circulars 10300-10399   09-12-31 to 10-02-10
Circulars 10200-10299   09-11-28 to 09-12-30
Circulars 10100-10199   09-10-29 to 09-11-28
Circulars 10000-10099   09-10-08 to 09-10-29
Circulars 9900-9999   09-09-05 to 09-10-08
Circulars 9800-9899   09-08-14 to 09-09-05
Circulars 9700-9799   09-07-22 to 09-08-14
Circulars 9600-9699   09-07-01 to 09-07-22
Circulars 9500-9599   09-06-09 to 09-06-30
Circulars 9400-9499   09-05-19 to 09-06-09
Circulars 9300-9399   09-04-29 to 09-05-19
Circulars 9200-9299   09-04-23 to 09-04-29
Circulars 9100-9199   09-04-06 to 09-04-23
Circulars 9000-9099   09-03-15 to 09-04-06
Circulars 8900-8999   09-02-11 to 09-03-15
Circulars 8800-8899   09-01-12 to 09-02-10
Circulars 8700-8799   08-12-22 to 09-01-12
Circulars 8600-8699   08-12-03 to 08-12-22
Circulars 8500-8599   08-11-09 to 08-12-03
Circulars 8400-8499   08-10-24 to 08-11-08
Circulars 8300-8399   08-09-29 to 08-10-24
Circulars 8200-8299   08-09-08 to 08-09-29
Circulars 8100-8199   08-08-12 to 08-09-08
Circulars 8000-8099   08-07-23 to 08-08-12
Circulars 7900-7999   08-06-23 to 08-07-23
Circulars 7800-7899   08-06-04 to 08-06-23
Circulars 7700-7799   08-05-08 to 08-06-04
Circulars 7600-7699   08-04-13 to 08-05-08
Circulars 7500-7599   08-03-21 to 08-04-13
Circulars 7400-7499   08-03-10 to 08-03-21
Circulars 7300-7399   08-02-13 to 08-03-10
Circulars 7200-7299   08-01-21 to 08-02-13
Circulars 7100-7199   07-11-17 to 08-01-21
Circulars 7000-7099   07-10-25 to 07-11-17
Circulars 6900-6999   07-10-12 to 07-10-25
Circulars 6800-6899   07-09-19 to 07-10-12
Circulars 6700-6799   07-08-02 to 07-09-18
Circulars 6600-6699   07-07-05 to 07-08-02
Circulars 6500-6599   07-06-11 to 07-07-05
Circulars 6400-6499   07-05-09 to 07-06-11
Circulars 6300-6399   07-04-18 to 07-05-09
Circulars 6200-6299   07-03-12 to 07-04-18
Circulars 6100-6199   07-02-12 to 07-03-12
Circulars 6000-6099   07-01-07 to 07-02-12
Circulars 5900-5999   06-12-05 to 07-01-07
Circulars 5800-5899   06-11-10 to 06-12-05
Circulars 5700-5799   06-10-06 to 06-11-10
Circulars 5600-5699   06-09-23 to 06-10-06
Circulars 5500-5599   06-09-03 to 06-09-23
Circulars 5400-5499   06-08-05 to 06-09-03
Circulars 5300-5399   06-07-11 to 06-08-05
Circulars 5200-5299   06-06-10 to 06-07-11
Circulars 5100-5199   06-05-10 to 06-06-03
Circulars 5000-5099   06-04-24 to 06-05-10
Circulars 4900-4999   06-03-21 to 06-04-24
Circulars 4800-4899   06-02-20 to 06-03-21
Circulars 4700-4799   06-02-06 to 06-02-20
Circulars 4600-4699   06-01-25 to 06-02-06
Circulars 4500-4599   06-01-13 to 06-01-25
Circulars 4400-4499   05-12-27 to 06-01-13
Circulars 4300-4399   05-11-22 to 05-12-27
Circulars 4200-4299   05-11-06 to 05-11-22
Circulars 4100-4199   05-10-16 to 05-11-06
Circulars 4000-4099   05-09-19 to 05-10-16
Circulars 3900-3999   05-08-28 to 05-09-18
Circulars 3800-3899   05-08-14 to 05-08-28
Circulars 3700-3799   05-07-29 to 05-08-14
Circulars 3600-3699   05-07-13 to 05-07-29
Circulars 3500-3599   05-05-28 to 05-07-13
Circulars 3400-3499   05-05-10 to 05-05-28
Circulars 3300-3399   05-04-21 to 05-05-10
Circulars 3200-3299   05-04-09 to 05-04-21
Circulars 3100-3199   05-03-16 to 05-04-09
Circulars 3000-3099   05-01-30 to 05-03-16
Circulars 2900-2999   04-12-23 to 05-01-28
Circulars 2800-2899   04-10-13 to 04-12-23
Circulars 2700-2799   04-09-09 to 04-10-13
Circulars 2600-2699   04-05-14 to 04-09-09
Circulars 2500-2599   03-12-22 to 04-05-14
Circulars 2400-2499   03-09-25 to 03-12-21
Circulars 2300-2399   03-07-15 to 03-09-24
Circulars 2200-2299   03-05-03 to 03-07-15
Circulars 2100-2199   03-04-05 to 03-05-03
Circulars 2000-2099   03-03-27 to 03-04-05
Circulars 1900-1999   03-02-27 to 03-03-29
Circulars 1800-1899   03-01-11 to 03-02-27
Circulars 1700-1799   02-11-20 to 03-01-11
Circulars 1600-1699   02-10-07 to 02-11-19
Circulars 1500-1599   02-08-16 to 02-10-07
Circulars 1400-1499   02-05-31 to 02-08-16
Circulars 1300-1399   02-03-22 to 02-05-31
Circulars 1200-1299   01-12-13 to 02-03-12
Circulars 1100-1199   01-09-22 to 01-12-13
Circulars 1000-1099   01-03-02 to 01-09-22
Circulars 900-999   00-12-14 to 01-03-01
Circulars 800-899   00-09-27 to 00-12-14
Circulars 700-799   00-06-13 to 00-09-27
Circulars 600-699   00-03-08 to 00-06-13
Circulars 500-599   99-12-16 to 00-03-08
Circulars 400-499   99-08-10 to 99-12-16
Circulars 300-399   99-05-08 to 99-08-10
Circulars 199-299   99-01-23 to 99-05-07
Circulars 100-198   98-06-13 to 99-01-22
Circulars neg4-099   97-02-?? to 98-06-13

Tar file of all the circulars (as of a couple minutes after every midnight US EastCoast local time).
This tarfile is a convenient way of getting all the Circulars if you want to 'mine' them for some particular need.
(If you are willing to share, I would appreciate getting a copy (for my own private GCN_Administrater use)
of whatever statistical analyses you derive from your mining.)